Articles | Volume 19, issue 20
https://doi.org/10.5194/bg-19-4965-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-19-4965-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
27 Oct 2022
Research article |
| 27 Oct 2022
| 27 Oct 2022
How biogenic polymers control surfactant dynamics in the surface microlayer: insights from a coastal Baltic Sea study
Theresa Barthelmeß
CORRESPONDING AUTHOR
GEOMAR Helmholtz Centre for Ocean Research Kiel, 24105 Kiel, Germany
Anja Engel
GEOMAR Helmholtz Centre for Ocean Research Kiel, 24105 Kiel, Germany
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Karine Sellegri, Theresa Barthelmeß, Jonathan Trueblood, Antonia Cristi, Evelyn Freney, Clémence Rose, Neill Barr, Mike Harvey, Karl Safi, Stacy Deppeler, Karen Thompson, Wayne Dillon, Anja Engel, and Cliff Law
Atmos. Chem. Phys., 23, 12949–12964, https://doi.org/10.5194/acp-23-12949-2023, https://doi.org/10.5194/acp-23-12949-2023, 2023
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The amount of sea spray emitted to the atmosphere depends on the ocean temperature, but this dependency is not well understood, especially when ocean biology is involved. In this study, we show that sea spray emissions are increased by up to a factor of 4 at low seawater temperatures compared to moderate temperatures, and we quantify the temperature dependence as a function of the ocean biogeochemistry.
Manon Rocco, Erin Dunne, Alexia Saint-Macary, Maija Peltola, Theresa Barthelmeß, Neill Barr, Karl Safi, Andrew Marriner, Stacy Deppeler, James Harnwell, Anja Engel, Aurélie Colomb, Alfonso Saiz-Lopez, Mike Harvey, Cliff S. Law, and Karine Sellegri
EGUsphere, https://doi.org/10.5194/egusphere-2023-516, https://doi.org/10.5194/egusphere-2023-516, 2023
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During the Sea2cloud campaign in the Southern Pacific Ocean, we measured air-sea emissions from phytopankton of two key atmospheric compounds: DMS and MeSH. These compounds are well-known to play a great role in atmospheric chemistry and climate. We see in this paper that these compounds are most emited by the nanophytoplankton population. We provide here parameters for climate models to predict future trends of the emissions of these compounds and their roles and impacts on the global warming.
Alexia D. Saint-Macary, Andrew Marriner, Theresa Barthelmeß, Stacy Deppeler, Karl Safi, Rafael Costa Santana, Mike Harvey, and Cliff S. Law
Ocean Sci., 19, 1–15, https://doi.org/10.5194/os-19-1-2023, https://doi.org/10.5194/os-19-1-2023, 2023
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The uppermost oceanic layer was sampled to determine what can explain a potential dimethyl sulfide (DMS) enrichment in this environment. A novel sampling method was used, and the results showed that DMS was not as enriched as expected. Our results showed that the phytoplanktonic composition influenced the DMS concentration, confirming results from another study in this oceanic region. However, additional factors are required to observe a DMS enrichment in the uppermost oceanic layer.
Karine Sellegri, Theresa Barthelmeß, Jonathan Trueblood, Antonia Cristi, Evelyn Freney, Clémence Rose, Neill Barr, Mike Harvey, Karl Safi, Stacy Deppeler, Karen Thompson, Wayne Dillon, Anja Engel, and Cliff Law
Atmos. Chem. Phys., 23, 12949–12964, https://doi.org/10.5194/acp-23-12949-2023, https://doi.org/10.5194/acp-23-12949-2023, 2023
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The amount of sea spray emitted to the atmosphere depends on the ocean temperature, but this dependency is not well understood, especially when ocean biology is involved. In this study, we show that sea spray emissions are increased by up to a factor of 4 at low seawater temperatures compared to moderate temperatures, and we quantify the temperature dependence as a function of the ocean biogeochemistry.
Manon Rocco, Erin Dunne, Alexia Saint-Macary, Maija Peltola, Theresa Barthelmeß, Neill Barr, Karl Safi, Andrew Marriner, Stacy Deppeler, James Harnwell, Anja Engel, Aurélie Colomb, Alfonso Saiz-Lopez, Mike Harvey, Cliff S. Law, and Karine Sellegri
EGUsphere, https://doi.org/10.5194/egusphere-2023-516, https://doi.org/10.5194/egusphere-2023-516, 2023
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During the Sea2cloud campaign in the Southern Pacific Ocean, we measured air-sea emissions from phytopankton of two key atmospheric compounds: DMS and MeSH. These compounds are well-known to play a great role in atmospheric chemistry and climate. We see in this paper that these compounds are most emited by the nanophytoplankton population. We provide here parameters for climate models to predict future trends of the emissions of these compounds and their roles and impacts on the global warming.
Alexia D. Saint-Macary, Andrew Marriner, Theresa Barthelmeß, Stacy Deppeler, Karl Safi, Rafael Costa Santana, Mike Harvey, and Cliff S. Law
Ocean Sci., 19, 1–15, https://doi.org/10.5194/os-19-1-2023, https://doi.org/10.5194/os-19-1-2023, 2023
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The uppermost oceanic layer was sampled to determine what can explain a potential dimethyl sulfide (DMS) enrichment in this environment. A novel sampling method was used, and the results showed that DMS was not as enriched as expected. Our results showed that the phytoplanktonic composition influenced the DMS concentration, confirming results from another study in this oceanic region. However, additional factors are required to observe a DMS enrichment in the uppermost oceanic layer.
Lin Yang, Jing Zhang, Anja Engel, and Gui-Peng Yang
Biogeosciences, 19, 5251–5268, https://doi.org/10.5194/bg-19-5251-2022, https://doi.org/10.5194/bg-19-5251-2022, 2022
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Enrichment factors of dissolved organic matter (DOM) in the eastern marginal seas of China exhibited a significant spatio-temporal variation. Photochemical and enrichment processes co-regulated DOM enrichment in the sea-surface microlayer (SML). Autochthonous DOM was more frequently enriched in the SML than terrestrial DOM. DOM in the sub-surface water exhibited higher aromaticity than that in the SML.
Quentin Devresse, Kevin W. Becker, Arne Bendinger, Johannes Hahn, and Anja Engel
Biogeosciences, 19, 5199–5219, https://doi.org/10.5194/bg-19-5199-2022, https://doi.org/10.5194/bg-19-5199-2022, 2022
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Eddies are ubiquitous in the ocean and alter physical, chemical, and biological processes. However, how they affect organic carbon production and consumption is largely unknown. Here we show how an eddy triggers a cascade effect on biomass production and metabolic activities of phyto- and bacterioplankton. Our results may contribute to the improvement of biogeochemical models used to estimate carbon fluxes in the ocean.
Manuela van Pinxteren, Tiera-Brandy Robinson, Sebastian Zeppenfeld, Xianda Gong, Enno Bahlmann, Khanneh Wadinga Fomba, Nadja Triesch, Frank Stratmann, Oliver Wurl, Anja Engel, Heike Wex, and Hartmut Herrmann
Atmos. Chem. Phys., 22, 5725–5742, https://doi.org/10.5194/acp-22-5725-2022, https://doi.org/10.5194/acp-22-5725-2022, 2022
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A class of marine particles (transparent exopolymer particles, TEPs) that is ubiquitously found in the world oceans was measured for the first time in ambient marine aerosol particles and marine cloud waters in the tropical Atlantic Ocean. TEPs are likely to have good properties for influencing clouds. We show that TEPs are transferred from the ocean to the marine atmosphere via sea-spray formation and our results suggest that they can also form directly in aerosol particles and in cloud water.
France Van Wambeke, Vincent Taillandier, Karine Desboeufs, Elvira Pulido-Villena, Julie Dinasquet, Anja Engel, Emilio Marañón, Céline Ridame, and Cécile Guieu
Biogeosciences, 18, 5699–5717, https://doi.org/10.5194/bg-18-5699-2021, https://doi.org/10.5194/bg-18-5699-2021, 2021
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Simultaneous in situ measurements of (dry and wet) atmospheric deposition and biogeochemical stocks and fluxes in the sunlit waters of the open Mediterranean Sea revealed complex physical and biological processes occurring within the mixed layer. Nitrogen (N) budgets were computed to compare the sources and sinks of N in the mixed layer. The transitory effect observed after a wet dust deposition impacted the microbial food web down to the deep chlorophyll maximum.
Frédéric Gazeau, France Van Wambeke, Emilio Marañón, Maria Pérez-Lorenzo, Samir Alliouane, Christian Stolpe, Thierry Blasco, Nathalie Leblond, Birthe Zäncker, Anja Engel, Barbara Marie, Julie Dinasquet, and Cécile Guieu
Biogeosciences, 18, 5423–5446, https://doi.org/10.5194/bg-18-5423-2021, https://doi.org/10.5194/bg-18-5423-2021, 2021
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Our study shows that the impact of dust deposition on primary production depends on the initial composition and metabolic state of the tested community and is constrained by the amount of nutrients added, to sustain both the fast response of heterotrophic prokaryotes and the delayed one of phytoplankton. Under future environmental conditions, heterotrophic metabolism will be more impacted than primary production, therefore reducing the capacity of surface waters to sequester anthropogenic CO2.
Evelyn Freney, Karine Sellegri, Alessia Nicosia, Leah R. Williams, Matteo Rinaldi, Jonathan T. Trueblood, André S. H. Prévôt, Melilotus Thyssen, Gérald Grégori, Nils Haëntjens, Julie Dinasquet, Ingrid Obernosterer, France Van Wambeke, Anja Engel, Birthe Zäncker, Karine Desboeufs, Eija Asmi, Hilkka Timonen, and Cécile Guieu
Atmos. Chem. Phys., 21, 10625–10641, https://doi.org/10.5194/acp-21-10625-2021, https://doi.org/10.5194/acp-21-10625-2021, 2021
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In this work, we present observations of the organic aerosol content in primary sea spray aerosols (SSAs) continuously generated along a 5-week cruise in the Mediterranean. This information is combined with seawater biogeochemical properties also measured continuously along the ship track to develop a number of parametrizations that can be used in models to determine SSA organic content in oligotrophic waters that represent 60 % of the oceans from commonly measured seawater variables.
Gerd Krahmann, Damian L. Arévalo-Martínez, Andrew W. Dale, Marcus Dengler, Anja Engel, Nicolaas Glock, Patricia Grasse, Johannes Hahn, Helena Hauss, Mark Hopwood, Rainer Kiko, Alexandra Loginova, Carolin R. Löscher, Marie Maßmig, Alexandra-Sophie Roy, Renato Salvatteci, Stefan Sommer, Toste Tanhua, and Hela Mehrtens
Earth Syst. Sci. Data Discuss., https://doi.org/10.5194/essd-2020-308, https://doi.org/10.5194/essd-2020-308, 2021
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The project "Climate-Biogeochemistry Interactions in the Tropical Ocean" (SFB 754) was a multidisciplinary research project active from 2008 to 2019 aimed at a better understanding of the coupling between the tropical climate and ocean circulation and the ocean's oxygen and nutrient balance. On 34 research cruises, mainly in the Southeast Tropical Pacific and the Northeast Tropical Atlantic, 1071 physical, chemical and biological data sets were collected.
France Van Wambeke, Elvira Pulido, Philippe Catala, Julie Dinasquet, Kahina Djaoudi, Anja Engel, Marc Garel, Sophie Guasco, Barbara Marie, Sandra Nunige, Vincent Taillandier, Birthe Zäncker, and Christian Tamburini
Biogeosciences, 18, 2301–2323, https://doi.org/10.5194/bg-18-2301-2021, https://doi.org/10.5194/bg-18-2301-2021, 2021
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Michaelis–Menten kinetics were determined for alkaline phosphatase, aminopeptidase and β-glucosidase in the Mediterranean Sea. Although the ectoenzymatic-hydrolysis contribution to heterotrophic prokaryotic needs was high in terms of N, it was low in terms of C. This study points out the biases in interpretation of the relative differences in activities among the three tested enzymes in regard to the choice of added concentrations of fluorogenic substrates.
Jonathan V. Trueblood, Alessia Nicosia, Anja Engel, Birthe Zäncker, Matteo Rinaldi, Evelyn Freney, Melilotus Thyssen, Ingrid Obernosterer, Julie Dinasquet, Franco Belosi, Antonio Tovar-Sánchez, Araceli Rodriguez-Romero, Gianni Santachiara, Cécile Guieu, and Karine Sellegri
Atmos. Chem. Phys., 21, 4659–4676, https://doi.org/10.5194/acp-21-4659-2021, https://doi.org/10.5194/acp-21-4659-2021, 2021
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Sea spray aerosols (SSAs) can be an important source of ice-nucleating particles (INPs) that impact cloud properties over the oceans. In the Mediterranean Sea, we found that the INPs in the seawater surface microlayer increased by an order of magnitude after a rain dust event that impacted iron and bacterial abundances. The INP properties of SSA (INPSSA) increased after a 3 d delay. Outside this event, INPSSA could be parameterized as a function of the seawater biogeochemistry.
Birthe Zäncker, Michael Cunliffe, and Anja Engel
Biogeosciences, 18, 2107–2118, https://doi.org/10.5194/bg-18-2107-2021, https://doi.org/10.5194/bg-18-2107-2021, 2021
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Fungi are found in numerous marine environments. Our study found an increased importance of fungi in the Ionian Sea, where bacterial and phytoplankton counts were reduced, but organic matter was still available, suggesting fungi might benefit from the reduced competition from bacteria in low-nutrient, low-chlorophyll (LNLC) regions.
Emilio Marañón, France Van Wambeke, Julia Uitz, Emmanuel S. Boss, Céline Dimier, Julie Dinasquet, Anja Engel, Nils Haëntjens, María Pérez-Lorenzo, Vincent Taillandier, and Birthe Zäncker
Biogeosciences, 18, 1749–1767, https://doi.org/10.5194/bg-18-1749-2021, https://doi.org/10.5194/bg-18-1749-2021, 2021
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The concentration of chlorophyll is commonly used as an indicator of the abundance of photosynthetic plankton (phytoplankton) in lakes and oceans. Our study investigates why a deep chlorophyll maximum, located near the bottom of the upper, illuminated layer develops in the Mediterranean Sea. We find that the acclimation of cells to low light is the main mechanism involved and that this deep maximum represents also a maximum in the biomass and carbon fixation activity of phytoplankton.
Nadja Triesch, Manuela van Pinxteren, Anja Engel, and Hartmut Herrmann
Atmos. Chem. Phys., 21, 163–181, https://doi.org/10.5194/acp-21-163-2021, https://doi.org/10.5194/acp-21-163-2021, 2021
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To investigate the sources of free amino acids (FAAs) in the marine atmosphere, concerted measurements (the simultaneous investigation of seawater, size-segregated aerosol particles and cloud water) were performed at the Cabo Verde islands. This study describes the transfer of FAAs as part of organic matter from the ocean into the atmosphere on a molecular level. In the investigated marine environment, a high enrichment of FAAs in submicron aerosol particles and in cloud droplets was observed.
Alexandra N. Loginova, Andrew W. Dale, Frédéric A. C. Le Moigne, Sören Thomsen, Stefan Sommer, David Clemens, Klaus Wallmann, and Anja Engel
Biogeosciences, 17, 4663–4679, https://doi.org/10.5194/bg-17-4663-2020, https://doi.org/10.5194/bg-17-4663-2020, 2020
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We measured dissolved organic carbon (DOC), nitrogen (DON) and matter (DOM) optical properties in pore waters and near-bottom waters of the eastern tropical South Pacific off Peru. The difference between diffusion-driven and net fluxes of DOC and DON and qualitative changes in DOM optical properties suggested active microbial utilisation of the released DOM at the sediment–water interface. Our results suggest that the sediment release of DOM contributes to microbial processes in the area.
Sebastian Zeppenfeld, Manuela van Pinxteren, Anja Engel, and Hartmut Herrmann
Ocean Sci., 16, 817–830, https://doi.org/10.5194/os-16-817-2020, https://doi.org/10.5194/os-16-817-2020, 2020
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An analytical method combining electro-dialysis with high-performance anionic exchange chromatography coupled to pulsed amperometric detection was developed and optimized for analyzing free and combined carbohydrates in seawater and other saline environmental samples.
Antonio Tovar-Sánchez, Araceli Rodríguez-Romero, Anja Engel, Birthe Zäncker, Franck Fu, Emilio Marañón, María Pérez-Lorenzo, Matthieu Bressac, Thibaut Wagener, Sylvain Triquet, Guillaume Siour, Karine Desboeufs, and Cécile Guieu
Biogeosciences, 17, 2349–2364, https://doi.org/10.5194/bg-17-2349-2020, https://doi.org/10.5194/bg-17-2349-2020, 2020
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Residence times of particulate metals derived from aerosol deposition in the Sea Surface Microlayer of the Mediterranean Sea ranged from a couple of minutes (e.g., for Fe) to a few hours (e.g., for Cu). Microbial activity seems to play an important role in in this process and in the concentration and distribution of metals between diferent water layers.
Marie Maßmig, Jan Lüdke, Gerd Krahmann, and Anja Engel
Biogeosciences, 17, 215–230, https://doi.org/10.5194/bg-17-215-2020, https://doi.org/10.5194/bg-17-215-2020, 2020
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Little is known about the rates of bacterial element cycling in oxygen minimum zones (OMZs). We measured bacterial production and rates of extracellular hydrolytic enzymes at various in situ oxygen concentrations in the OMZ off Peru. Our field data show unhampered bacterial activity at low oxygen concentrations. Meanwhile bacterial degradation of organic matter substantially contributed to the formation of the OMZ.
Alexandra N. Loginova, Sören Thomsen, Marcus Dengler, Jan Lüdke, and Anja Engel
Biogeosciences, 16, 2033–2047, https://doi.org/10.5194/bg-16-2033-2019, https://doi.org/10.5194/bg-16-2033-2019, 2019
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High primary production in the Peruvian upwelling system is followed by rapid heterotrophic utilization of organic matter and supports the formation of one of the most intense oxygen minimum zones (OMZs) in the world. Here, we estimated vertical fluxes of oxygen and dissolved organic matter (DOM) from the surface to the OMZ. Our results suggest that DOM remineralization substantially reduces oxygen concentration in the upper water column and controls the shape of the upper oxycline.
Soeren Thomsen, Johannes Karstensen, Rainer Kiko, Gerd Krahmann, Marcus Dengler, and Anja Engel
Biogeosciences, 16, 979–998, https://doi.org/10.5194/bg-16-979-2019, https://doi.org/10.5194/bg-16-979-2019, 2019
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Physical and biogeochemical observations from an autonomous underwater vehicle in combination with ship-based measurements are used to investigate remote and local drivers of the oxygen and nutrient variability off Mauritania. Beside the transport of oxygen and nutrients characteristics from remote areas towards Mauritania also local remineralization of organic material close to the seabed seems to be important for the distribution of oxygen and nutrients.
Carolina Cisternas-Novoa, Frédéric A. C. Le Moigne, and Anja Engel
Biogeosciences, 16, 927–947, https://doi.org/10.5194/bg-16-927-2019, https://doi.org/10.5194/bg-16-927-2019, 2019
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We investigate the composition and vertical fluxes of POM in two deep basins of the Baltic Sea (GB: Gotland Basin and LD: Landsort Deep). The two basins showed different O2 regimes resulting from the intrusion of oxygen-rich water from the North Sea that ventilated the deep waters in GB, but not in LD.
In GB, O2 intrusions lead to a high abundance of manganese oxides that aggregate with POM, altering its composition and vertical flux and contributing to a higher POC transfer efficiency in GB.
Cui-Ci Sun, Martin Sperling, and Anja Engel
Biogeosciences, 15, 3577–3589, https://doi.org/10.5194/bg-15-3577-2018, https://doi.org/10.5194/bg-15-3577-2018, 2018
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Biogenic gel particles such as transparent exopolymer particles (TEP) and Coomassie stainable particles (CSP) are important components in the sea-surface microlayer (SML). Their potential role in air–sea gas exchange and in primary organic aerosol emission has generated considerable research interest. Our wind wave channel experiment revealed how wind speed controls the accumulation and size distribution of biogenic gel particles in the SML.
Anja Engel, Hannes Wagner, Frédéric A. C. Le Moigne, and Samuel T. Wilson
Biogeosciences, 14, 1825–1838, https://doi.org/10.5194/bg-14-1825-2017, https://doi.org/10.5194/bg-14-1825-2017, 2017
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To better understand the role of oxygen for the biological carbon pump, we studied particle fluxes through hypoxic waters in the eastern tropical North Atlantic. Attenuation of organic carbon fluxes over depth was lower than expected from seawater temperatures, indicating co-effects of oxygen concentration. Differences were observed for individual organic components, suggesting that future carbon export fluxes may depend on changes in surface ocean organic matter quality under global change.
Helmke Hepach, Birgit Quack, Susann Tegtmeier, Anja Engel, Astrid Bracher, Steffen Fuhlbrügge, Luisa Galgani, Elliot L. Atlas, Johannes Lampel, Udo Frieß, and Kirstin Krüger
Atmos. Chem. Phys., 16, 12219–12237, https://doi.org/10.5194/acp-16-12219-2016, https://doi.org/10.5194/acp-16-12219-2016, 2016
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We present surface seawater measurements of bromo- and iodocarbons, which are involved in numerous atmospheric processes such as tropospheric and stratospheric ozone chemistry, from the highly productive Peruvian upwelling. By combining trace gas measurements, characterization of organic matter and phytoplankton species, and tropospheric modelling, we show that large amounts of iodocarbons produced from the pool of organic matter may contribute strongly to local tropospheric iodine loading.
Carolin R. Löscher, Hermann W. Bange, Ruth A. Schmitz, Cameron M. Callbeck, Anja Engel, Helena Hauss, Torsten Kanzow, Rainer Kiko, Gaute Lavik, Alexandra Loginova, Frank Melzner, Judith Meyer, Sven C. Neulinger, Markus Pahlow, Ulf Riebesell, Harald Schunck, Sören Thomsen, and Hannes Wagner
Biogeosciences, 13, 3585–3606, https://doi.org/10.5194/bg-13-3585-2016, https://doi.org/10.5194/bg-13-3585-2016, 2016
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The ocean loses oxygen due to climate change. Addressing this issue in tropical ocean regions (off Peru and Mauritania), we aimed to understand the effects of oxygen depletion on various aspects of marine biogeochemistry, including primary production and export production, the nitrogen cycle, greenhouse gas production, organic matter fluxes and remineralization, and the role of zooplankton and viruses.
Luisa Galgani and Anja Engel
Biogeosciences, 13, 2453–2473, https://doi.org/10.5194/bg-13-2453-2016, https://doi.org/10.5194/bg-13-2453-2016, 2016
Anja Engel and Luisa Galgani
Biogeosciences, 13, 989–1007, https://doi.org/10.5194/bg-13-989-2016, https://doi.org/10.5194/bg-13-989-2016, 2016
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The sea-surface microlayer (SML) is a very thin layer at the interface between the ocean and the atmosphere. Organic compounds in the SML may influence the exchange of gases between seawater and air, as well as primary aerosol emission. Here, we report results from the SOPRAN M91 cruise, a field study to the coastal upwelling regime off Peru's coast in 2012. Our study provides novel insight to the relationship between plankton productivity, wind speed and organic matter accumulation in the SML.
A. N. Loginova, C. Borchard, J. Meyer, H. Hauss, R. Kiko, and A. Engel
Biogeosciences, 12, 6897–6914, https://doi.org/10.5194/bg-12-6897-2015, https://doi.org/10.5194/bg-12-6897-2015, 2015
A. Engel, C. Borchard, A. Loginova, J. Meyer, H. Hauss, and R. Kiko
Biogeosciences, 12, 5647–5665, https://doi.org/10.5194/bg-12-5647-2015, https://doi.org/10.5194/bg-12-5647-2015, 2015
C. Borchard and A. Engel
Biogeosciences, 12, 1271–1284, https://doi.org/10.5194/bg-12-1271-2015, https://doi.org/10.5194/bg-12-1271-2015, 2015
A. Silyakova, R. G. J. Bellerby, K. G. Schulz, J. Czerny, T. Tanaka, G. Nondal, U. Riebesell, A. Engel, T. De Lange, and A. Ludvig
Biogeosciences, 10, 4847–4859, https://doi.org/10.5194/bg-10-4847-2013, https://doi.org/10.5194/bg-10-4847-2013, 2013
J. Czerny, K. G. Schulz, T. Boxhammer, R. G. J. Bellerby, J. Büdenbender, A. Engel, S. A. Krug, A. Ludwig, K. Nachtigall, G. Nondal, B. Niehoff, A. Silyakova, and U. Riebesell
Biogeosciences, 10, 3109–3125, https://doi.org/10.5194/bg-10-3109-2013, https://doi.org/10.5194/bg-10-3109-2013, 2013
S. D. Archer, S. A. Kimmance, J. A. Stephens, F. E. Hopkins, R. G. J. Bellerby, K. G. Schulz, J. Piontek, and A. Engel
Biogeosciences, 10, 1893–1908, https://doi.org/10.5194/bg-10-1893-2013, https://doi.org/10.5194/bg-10-1893-2013, 2013
J. Unger, S. Endres, N. Wannicke, A. Engel, M. Voss, G. Nausch, and M. Nausch
Biogeosciences, 10, 1483–1499, https://doi.org/10.5194/bg-10-1483-2013, https://doi.org/10.5194/bg-10-1483-2013, 2013
A. Engel, C. Borchard, J. Piontek, K. G. Schulz, U. Riebesell, and R. Bellerby
Biogeosciences, 10, 1291–1308, https://doi.org/10.5194/bg-10-1291-2013, https://doi.org/10.5194/bg-10-1291-2013, 2013
J. Piontek, C. Borchard, M. Sperling, K. G. Schulz, U. Riebesell, and A. Engel
Biogeosciences, 10, 297–314, https://doi.org/10.5194/bg-10-297-2013, https://doi.org/10.5194/bg-10-297-2013, 2013
M. Sperling, J. Piontek, G. Gerdts, A. Wichels, H. Schunck, A.-S. Roy, J. La Roche, J. Gilbert, J. I. Nissimov, L. Bittner, S. Romac, U. Riebesell, and A. Engel
Biogeosciences, 10, 181–191, https://doi.org/10.5194/bg-10-181-2013, https://doi.org/10.5194/bg-10-181-2013, 2013
K. G. Schulz, R. G. J. Bellerby, C. P. D. Brussaard, J. Büdenbender, J. Czerny, A. Engel, M. Fischer, S. Koch-Klavsen, S. A. Krug, S. Lischka, A. Ludwig, M. Meyerhöfer, G. Nondal, A. Silyakova, A. Stuhr, and U. Riebesell
Biogeosciences, 10, 161–180, https://doi.org/10.5194/bg-10-161-2013, https://doi.org/10.5194/bg-10-161-2013, 2013
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Identifying the biological control of the annual and multi-year variations in South Atlantic air–sea CO2 flux
The sensitivity of pCO2 reconstructions to sampling scales across a Southern Ocean sub-domain: a semi-idealized ocean sampling simulation approach
Physical mechanisms for biological carbon uptake during the onset of the spring phytoplankton bloom in the northwestern Mediterranean Sea (BOUSSOLE site)
Wintertime process study of the North Brazil Current rings reveals the region as a larger sink for CO2 than expected
New constraints on biological production and mixing processes in the South China Sea from triple isotope composition of dissolved oxygen
Tidal mixing of estuarine and coastal waters in the western English Channel is a control on spatial and temporal variability in seawater CO2
A seamless ensemble-based reconstruction of surface ocean pCO2 and air–sea CO2 fluxes over the global coastal and open oceans
Sea ice concentration impacts dissolved organic gases in the Canadian Arctic
Evaluating the Arabian Sea as a regional source of atmospheric CO2: seasonal variability and drivers
An empirical MLR for estimating surface layer DIC and a comparative assessment to other gap-filling techniques for ocean carbon time series
Derivation of seawater pCO2 from net community production identifies the South Atlantic Ocean as a CO2 source
Eukaryotic community composition in the sea surface microlayer across an east–west transect in the Mediterranean Sea
Enhancement of the North Atlantic CO2 sink by Arctic Waters
Global ocean dimethyl sulfide climatology estimated from observations and an artificial neural network
Atmospheric deposition of organic matter at a remote site in the central Mediterranean Sea: implications for the marine ecosystem
Underway seawater and atmospheric measurements of volatile organic compounds in the Southern Ocean
Dimethylsulfide (DMS), marine biogenic aerosols and the ecophysiology of coral reefs
Spatial variations in CO2 fluxes in the Saguenay Fjord (Quebec, Canada) and results of a water mixing model
Gas exchange estimates in the Peruvian upwelling regime biased by multi-day near-surface stratification
Insights from year-long measurements of air–water CH4 and CO2 exchange in a coastal environment
On the role of climate modes in modulating the air–sea CO2 fluxes in eastern boundary upwelling systems
Reviews and syntheses: the GESAMP atmospheric iron deposition model intercomparison study
Increase of dissolved inorganic carbon and decrease in pH in near-surface waters in the Mediterranean Sea during the past two decades
Utilizing the Drake Passage Time-series to understand variability and change in subpolar Southern Ocean pCO2
Effect of wind speed on the size distribution of gel particles in the sea surface microlayer: insights from a wind–wave channel experiment
The seasonal cycle of pCO2 and CO2 fluxes in the Southern Ocean: diagnosing anomalies in CMIP5 Earth system models
Marine phytoplankton stoichiometry mediates nonlinear interactions between nutrient supply, temperature, and atmospheric CO2
Interannual drivers of the seasonal cycle of CO2 in the Southern Ocean
Constraints on global oceanic emissions of N2O from observations and models
Arctic Ocean CO2 uptake: an improved multiyear estimate of the air–sea CO2 flux incorporating chlorophyll a concentrations
Uncertainty in the global oceanic CO2 uptake induced by wind forcing: quantification and spatial analysis
Phytoplankton growth response to Asian dust addition in the northwest Pacific Ocean versus the Yellow Sea
Global high-resolution monthly pCO2 climatology for the coastal ocean derived from neural network interpolation
Changes in the partial pressure of carbon dioxide in the Mauritanian–Cap Vert upwelling region between 2005 and 2012
Impact of ocean acidification on Arctic phytoplankton blooms and dimethyl sulfide concentration under simulated ice-free and under-ice conditions
Coral reef origins of atmospheric dimethylsulfide at Heron Island, southern Great Barrier Reef, Australia
Bioavailable atmospheric phosphorous supply to the global ocean: a 3-D global modeling study
Coastal-ocean uptake of anthropogenic carbon
Role of zooplankton dynamics for Southern Ocean phytoplankton biomass and global biogeochemical cycles
Juan Yu, Lei Yu, Zhen He, Gui-Peng Yang, Jing-Guang Lai, and Qian Liu
Biogeosciences, 21, 161–176, https://doi.org/10.5194/bg-21-161-2024, https://doi.org/10.5194/bg-21-161-2024, 2024
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The distributions of volatile organic sulfur compounds (VSCs) (DMS, COS, and CS2) in the seawater and atmosphere of the Bohai and Yellow Seas were evaluated. Seasonal variations in VSCs were found and showed summer > spring. The COS concentrations exhibited positive correlation with DOC concentrations in seawater during summer. VSCs concentrations in seawater decreased with the depth. Sea-to-air fluxes of COS, DMS, and CS2 indicated that these marginal seas are sources of atmospheric VSCs.
Patrick J. Duke, Roberta C. Hamme, Debby Ianson, Peter Landschützer, Mohamed M. M. Ahmed, Neil C. Swart, and Paul A. Covert
Biogeosciences, 20, 3919–3941, https://doi.org/10.5194/bg-20-3919-2023, https://doi.org/10.5194/bg-20-3919-2023, 2023
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The ocean is both impacted by climate change and helps mitigate its effects through taking up carbon from the atmosphere. We used a machine learning approach to investigate what controls open-ocean carbon uptake in the northeast Pacific open ocean. Marine heatwaves that lasted 2–3 years increased uptake, while the upwelling strength of the Alaskan Gyre controlled uptake over 10-year time periods. The trend from 1998–2019 suggests carbon uptake in the northeast Pacific open ocean is increasing.
John Prytherch, Sonja Murto, Ian Brown, Adam Ulfsbo, Brett F. Thornton, Volker Brüchert, Michael Tjernström, Anna Lunde Hermansson, Amanda T. Nylund, and Lina A. Holthusen
Biogeosciences Discuss., https://doi.org/10.5194/bg-2023-82, https://doi.org/10.5194/bg-2023-82, 2023
Revised manuscript accepted for BG
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We used chamber-flux systems to directly measure methane and carbon dioxide exchange between the ocean or sea ice and the atmosphere during an icebreaker-based expedition to the Central Arctic Ocean in summer 2021. These measurement-based constraints inform climate modeling and carbon budgets. The methane exchange measurements, the first such made in the CAO, are lower than previous estimates and imply that the CAO is an insignificant contributor to Arctic methane emission.
Judith Vogt, David Risk, Evelise Bourlon, Kumiko Azetsu-Scott, Evan N. Edinger, and Owen A. Sherwood
Biogeosciences, 20, 1773–1787, https://doi.org/10.5194/bg-20-1773-2023, https://doi.org/10.5194/bg-20-1773-2023, 2023
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The release of the greenhouse gas methane from Arctic submarine sources could exacerbate climate change in a positive feedback. Continuous monitoring of atmospheric methane levels over a 5100 km voyage in the western margin of the Labrador Sea and Baffin Bay revealed above-global averages likely affected by both onshore and offshore methane sources. Instantaneous sea–air methane fluxes were near zero at all measured stations, including a persistent cold-seep location.
George Manville, Thomas G. Bell, Jane P. Mulcahy, Rafel Simó, Martí Galí, Anoop S. Mahajan, Shrivardhan Hulswar, and Paul R. Halloran
Biogeosciences, 20, 1813–1828, https://doi.org/10.5194/bg-20-1813-2023, https://doi.org/10.5194/bg-20-1813-2023, 2023
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We present the first global investigation of controls on seawater dimethylsulfide (DMS) spatial variability over scales of up to 100 km. Sea surface height anomalies, density, and chlorophyll a help explain almost 80 % of DMS variability. The results suggest that physical and biogeochemical processes play an equally important role in controlling DMS variability. These data provide independent confirmation that existing parameterisations of seawater DMS concentration use appropriate variables.
Ryo Dobashi and David T. Ho
Biogeosciences, 20, 1075–1087, https://doi.org/10.5194/bg-20-1075-2023, https://doi.org/10.5194/bg-20-1075-2023, 2023
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Seagrass meadows are productive ecosystems and bury much carbon. Understanding their role in the global carbon cycle requires knowledge of air–sea CO2 fluxes and hence the knowledge of gas transfer velocity (k). In this study, k was determined from the dual tracer technique in Florida Bay. The observed gas transfer velocity was lower than previous studies in the coastal and open oceans at the same wind speeds, most likely due to wave attenuation by seagrass and limited wind fetch in this area.
Valérie Gros, Bernard Bonsang, Roland Sarda-Estève, Anna Nikolopoulos, Katja Metfies, Matthias Wietz, and Ilka Peeken
Biogeosciences, 20, 851–867, https://doi.org/10.5194/bg-20-851-2023, https://doi.org/10.5194/bg-20-851-2023, 2023
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The oceans are both sources and sinks for trace gases important for atmospheric chemistry and marine ecology. Here, we quantified selected trace gases (including the biological metabolites dissolved dimethyl sulfide, methanethiol and isoprene) along a 2500 km transect from the North Atlantic to the Arctic Ocean. In the context of phytoplankton and bacterial communities, our study suggests that methanethiol (rarely measured before) might substantially influence ocean–atmosphere cycling.
Tsukasa Dobashi, Yuzo Miyazaki, Eri Tachibana, Kazutaka Takahashi, Sachiko Horii, Fuminori Hashihama, Saori Yasui-Tamura, Yoko Iwamoto, Shu-Kuan Wong, and Koji Hamasaki
Biogeosciences, 20, 439–449, https://doi.org/10.5194/bg-20-439-2023, https://doi.org/10.5194/bg-20-439-2023, 2023
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Water-soluble organic nitrogen (WSON) in marine aerosols is important for biogeochemical cycling of bioelements. Our shipboard measurements suggested that reactive nitrogen produced and exuded by nitrogen-fixing microorganisms in surface seawater likely contributed to the formation of WSON aerosols in the subtropical North Pacific. This study provides new implications for the role of marine microbial activity in the formation of WSON aerosols in the ocean surface.
Lukas Eickhoff, Maddalena Bayer-Giraldi, Naama Reicher, Yinon Rudich, and Thomas Koop
Biogeosciences, 20, 1–14, https://doi.org/10.5194/bg-20-1-2023, https://doi.org/10.5194/bg-20-1-2023, 2023
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The formation of ice is an important process in Earth’s atmosphere, biosphere, and cryosphere, in particular in polar regions. Our research focuses on the influence of the sea ice diatom Fragilariopsis cylindrus and of molecules produced by it upon heterogenous ice nucleation. For that purpose, we studied the freezing of tiny droplets containing the diatoms in a microfluidic device. Together with previous studies, our results suggest a common freezing behaviour of various sea ice diatoms.
Lucía Gutiérrez-Loza, Erik Nilsson, Marcus B. Wallin, Erik Sahlée, and Anna Rutgersson
Biogeosciences, 19, 5645–5665, https://doi.org/10.5194/bg-19-5645-2022, https://doi.org/10.5194/bg-19-5645-2022, 2022
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The exchange of CO2 between the ocean and the atmosphere is an essential aspect of the global carbon cycle and is highly relevant for the Earth's climate. In this study, we used 9 years of in situ measurements to evaluate the temporal variability in the air–sea CO2 fluxes in the Baltic Sea. Furthermore, using this long record, we assessed the effect of atmospheric and water-side mechanisms controlling the efficiency of the air–sea CO2 exchange under different wind-speed conditions.
Li Zhou, Dennis Booge, Miming Zhang, and Christa A. Marandino
Biogeosciences, 19, 5021–5040, https://doi.org/10.5194/bg-19-5021-2022, https://doi.org/10.5194/bg-19-5021-2022, 2022
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Trace gas air–sea exchange exerts an important control on air quality and climate, especially in the Southern Ocean (SO). Almost all of the measurements there are skewed to summer, but it is essential to expand our measurement database over greater temporal and spatial scales. Therefore, we report measured concentrations of dimethylsulfide (DMS, as well as related sulfur compounds) and isoprene in the Atlantic sector of the SO. The observations of isoprene are the first in the winter in the SO.
Daniel J. Ford, Gavin H. Tilstone, Jamie D. Shutler, and Vassilis Kitidis
Biogeosciences, 19, 4287–4304, https://doi.org/10.5194/bg-19-4287-2022, https://doi.org/10.5194/bg-19-4287-2022, 2022
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This study explores the seasonal, inter-annual, and multi-year drivers of the South Atlantic air–sea CO2 flux. Our analysis showed seasonal sea surface temperatures dominate in the subtropics, and the subpolar regions correlated with biological processes. Inter-annually, the El Niño–Southern Oscillation correlated with the CO2 flux by modifying sea surface temperatures and biological activity. Long-term trends indicated an important biological contribution to changes in the air–sea CO2 flux.
Laique M. Djeutchouang, Nicolette Chang, Luke Gregor, Marcello Vichi, and Pedro M. S. Monteiro
Biogeosciences, 19, 4171–4195, https://doi.org/10.5194/bg-19-4171-2022, https://doi.org/10.5194/bg-19-4171-2022, 2022
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Based on observing system simulation experiments using a mesoscale-resolving model, we found that to significantly improve uncertainties and biases in carbon dioxide (CO2) mapping in the Southern Ocean, it is essential to resolve the seasonal cycle (SC) of the meridional gradient of CO2 through high frequency (at least daily) observations that also span the region's meridional axis. We also showed that the estimated SC anomaly and mean annual CO2 are highly sensitive to seasonal sampling biases.
Liliane Merlivat, Michael Hemming, Jacqueline Boutin, David Antoine, Vincenzo Vellucci, Melek Golbol, Gareth A. Lee, and Laurence Beaumont
Biogeosciences, 19, 3911–3920, https://doi.org/10.5194/bg-19-3911-2022, https://doi.org/10.5194/bg-19-3911-2022, 2022
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We use in situ high-temporal-resolution measurements of dissolved inorganic carbon and atmospheric parameters at the air–sea interface to analyse phytoplankton bloom initiation identified as the net rate of biological carbon uptake in the Mediterranean Sea. The shift from wind-driven to buoyancy-driven mixing creates conditions for blooms to begin. Active mixing at the air–sea interface leads to the onset of the surface phytoplankton bloom due to the relaxation of wind speed following storms.
Léa Olivier, Jacqueline Boutin, Gilles Reverdin, Nathalie Lefèvre, Peter Landschützer, Sabrina Speich, Johannes Karstensen, Matthieu Labaste, Christophe Noisel, Markus Ritschel, Tobias Steinhoff, and Rik Wanninkhof
Biogeosciences, 19, 2969–2988, https://doi.org/10.5194/bg-19-2969-2022, https://doi.org/10.5194/bg-19-2969-2022, 2022
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We investigate the impact of the interactions between eddies and the Amazon River plume on the CO2 air–sea fluxes to better characterize the ocean carbon sink in winter 2020. The region is a strong CO2 sink, previously underestimated by a factor of 10 due to a lack of data and understanding of the processes responsible for the variability in ocean carbon parameters. The CO2 absorption is mainly driven by freshwater from the Amazon entrained by eddies and by the winter seasonal cooling.
Hana Jurikova, Osamu Abe, Fuh-Kwo Shiah, and Mao-Chang Liang
Biogeosciences, 19, 2043–2058, https://doi.org/10.5194/bg-19-2043-2022, https://doi.org/10.5194/bg-19-2043-2022, 2022
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We studied the isotopic composition of oxygen dissolved in seawater in the South China Sea. This tells us about the origin of oxygen in the water column, distinguishing between biological oxygen produced by phytoplankton communities and atmospheric oxygen entering seawater through gas exchange. We found that the East Asian Monsoon plays an important role in determining the amount of oxygen produced vs. consumed by the phytoplankton, as well as in inducing vertical water mass mixing.
Richard P. Sims, Michael Bedington, Ute Schuster, Andrew J. Watson, Vassilis Kitidis, Ricardo Torres, Helen S. Findlay, James R. Fishwick, Ian Brown, and Thomas G. Bell
Biogeosciences, 19, 1657–1674, https://doi.org/10.5194/bg-19-1657-2022, https://doi.org/10.5194/bg-19-1657-2022, 2022
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The amount of carbon dioxide (CO2) being absorbed by the ocean is relevant to the earth's climate. CO2 values in the coastal ocean and estuaries are not well known because of the instrumentation used. We used a new approach to measure CO2 across the coastal and estuarine zone. We found that CO2 and salinity were linked to the state of the tide. We used our CO2 measurements and model salinity to predict CO2. Previous studies overestimate how much CO2 the coastal ocean draws down at our site.
Thi Tuyet Trang Chau, Marion Gehlen, and Frédéric Chevallier
Biogeosciences, 19, 1087–1109, https://doi.org/10.5194/bg-19-1087-2022, https://doi.org/10.5194/bg-19-1087-2022, 2022
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Air–sea CO2 fluxes and associated uncertainty over the open ocean to coastal shelves are estimated with a new ensemble-based reconstruction of pCO2 trained on observation-based data. The regional distribution and seasonality of CO2 sources and sinks are consistent with those suggested in previous studies as well as mechanisms discussed therein. The ensemble-based uncertainty field allows identifying critical regions where improvements in pCO2 and air–sea CO2 flux estimates should be a priority.
Charel Wohl, Anna E. Jones, William T. Sturges, Philip D. Nightingale, Brent Else, Brian J. Butterworth, and Mingxi Yang
Biogeosciences, 19, 1021–1045, https://doi.org/10.5194/bg-19-1021-2022, https://doi.org/10.5194/bg-19-1021-2022, 2022
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We measured concentrations of five different organic gases in seawater in the high Arctic during summer. We found higher concentrations near the surface of the water column (top 5–10 m) and in areas of partial ice cover. This suggests that sea ice influences the concentrations of these gases. These gases indirectly exert a slight cooling effect on the climate, and it is therefore important to measure the levels accurately for future climate predictions.
Alain de Verneil, Zouhair Lachkar, Shafer Smith, and Marina Lévy
Biogeosciences, 19, 907–929, https://doi.org/10.5194/bg-19-907-2022, https://doi.org/10.5194/bg-19-907-2022, 2022
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The Arabian Sea is a natural CO2 source to the atmosphere, but previous work highlights discrepancies between data and models in estimating air–sea CO2 flux. In this study, we use a regional ocean model, achieve a flux closer to available data, and break down the seasonal cycles that impact it, with one result being the great importance of monsoon winds. As demonstrated in a meta-analysis, differences from data still remain, highlighting the great need for further regional data collection.
Jesse M. Vance, Kim Currie, John Zeldis, Peter W. Dillingham, and Cliff S. Law
Biogeosciences, 19, 241–269, https://doi.org/10.5194/bg-19-241-2022, https://doi.org/10.5194/bg-19-241-2022, 2022
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Long-term monitoring is needed to detect changes in our environment. Time series of ocean carbon have aided our understanding of seasonal cycles and provided evidence for ocean acidification. Data gaps are inevitable, yet no standard method for filling gaps exists. We present a regression approach here and compare it to seven other common methods to understand the impact of different approaches when assessing seasonal to climatic variability in ocean carbon.
Daniel J. Ford, Gavin H. Tilstone, Jamie D. Shutler, and Vassilis Kitidis
Biogeosciences, 19, 93–115, https://doi.org/10.5194/bg-19-93-2022, https://doi.org/10.5194/bg-19-93-2022, 2022
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This study identifies the most accurate biological proxy for the estimation of seawater pCO2 fields, which are key to assessing the ocean carbon sink. Our analysis shows that the net community production (NCP), the balance between photosynthesis and respiration, was more accurate than chlorophyll a within a neural network scheme. The improved pCO2 estimates, based on NCP, identified the South Atlantic Ocean as a net CO2 source, compared to a CO2 sink using chlorophyll a.
Birthe Zäncker, Michael Cunliffe, and Anja Engel
Biogeosciences, 18, 2107–2118, https://doi.org/10.5194/bg-18-2107-2021, https://doi.org/10.5194/bg-18-2107-2021, 2021
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Fungi are found in numerous marine environments. Our study found an increased importance of fungi in the Ionian Sea, where bacterial and phytoplankton counts were reduced, but organic matter was still available, suggesting fungi might benefit from the reduced competition from bacteria in low-nutrient, low-chlorophyll (LNLC) regions.
Jon Olafsson, Solveig R. Olafsdottir, Taro Takahashi, Magnus Danielsen, and Thorarinn S. Arnarson
Biogeosciences, 18, 1689–1701, https://doi.org/10.5194/bg-18-1689-2021, https://doi.org/10.5194/bg-18-1689-2021, 2021
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The Atlantic north of 50° N is an intense ocean sink area for atmospheric CO2. Observations in the vicinity of Iceland reveal a previously unrecognized Arctic contribution to the North Atlantic CO2 sink. Sustained CO2 influx to waters flowing from the Arctic Ocean is linked to their excess alkalinity derived from sources in the changing Arctic. The results relate to the following question: will the North Atlantic continue to absorb CO2 in the future as it has in the past?
Wei-Lei Wang, Guisheng Song, François Primeau, Eric S. Saltzman, Thomas G. Bell, and J. Keith Moore
Biogeosciences, 17, 5335–5354, https://doi.org/10.5194/bg-17-5335-2020, https://doi.org/10.5194/bg-17-5335-2020, 2020
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Dimethyl sulfide, a volatile compound produced as a byproduct of marine phytoplankton activity, can be emitted to the atmosphere via gas exchange. In the atmosphere, DMS is oxidized to cloud condensation nuclei, thus contributing to cloud formation. Therefore, oceanic DMS plays an important role in regulating the planet's climate by influencing the radiation budget. In this study, we use an artificial neural network model to update the global DMS climatology and estimate the sea-to-air flux.
Yuri Galletti, Silvia Becagli, Alcide di Sarra, Margherita Gonnelli, Elvira Pulido-Villena, Damiano M. Sferlazzo, Rita Traversi, Stefano Vestri, and Chiara Santinelli
Biogeosciences, 17, 3669–3684, https://doi.org/10.5194/bg-17-3669-2020, https://doi.org/10.5194/bg-17-3669-2020, 2020
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This paper reports the first data about atmospheric deposition of dissolved organic matter (DOM) on the island of Lampedusa. It also shows the implications for the surface marine layer by studying the impact of atmospheric organic carbon deposition in the marine ecosystem. It is a preliminary study, but it is pioneering and important for having new data that can be crucial in order to understand the impact of atmospheric deposition on the marine carbon cycle in a global climate change scenario.
Charel Wohl, Ian Brown, Vassilis Kitidis, Anna E. Jones, William T. Sturges, Philip D. Nightingale, and Mingxi Yang
Biogeosciences, 17, 2593–2619, https://doi.org/10.5194/bg-17-2593-2020, https://doi.org/10.5194/bg-17-2593-2020, 2020
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The oceans represent a poorly understood source of organic carbon to the atmosphere. In this paper, we present ship-based measurements of specific compounds in ambient air and seawater of the Southern Ocean. We present fluxes of these gases between air and sea at very high resolution. The data also contain evidence for day and night variations in some of these compounds. These measurements can be used to better understand the role of the Southern Ocean in the cycling of these compounds.
Rebecca L. Jackson, Albert J. Gabric, Roger Cropp, and Matthew T. Woodhouse
Biogeosciences, 17, 2181–2204, https://doi.org/10.5194/bg-17-2181-2020, https://doi.org/10.5194/bg-17-2181-2020, 2020
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Coral reefs are a strong source of atmospheric sulfur through stress-induced emissions of dimethylsulfide (DMS). This biogenic sulfur can influence aerosol and cloud properties and, consequently, the radiative balance over the ocean. DMS emissions may therefore help to mitigate coral physiological stress via increased low-level cloud cover and reduced sea surface temperature. The importance of DMS in coral physiology and climate is reviewed and the implications for coral bleaching are discussed.
Louise Delaigue, Helmuth Thomas, and Alfonso Mucci
Biogeosciences, 17, 547–566, https://doi.org/10.5194/bg-17-547-2020, https://doi.org/10.5194/bg-17-547-2020, 2020
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This paper reports on the first compilation and analysis of the surface water pCO2 distribution in the Saguenay Fjord, the southernmost subarctic fjord in the Northern Hemisphere, and thus fills a significant knowledge gap in current regional estimates of estuarine CO2 emissions.
Tim Fischer, Annette Kock, Damian L. Arévalo-Martínez, Marcus Dengler, Peter Brandt, and Hermann W. Bange
Biogeosciences, 16, 2307–2328, https://doi.org/10.5194/bg-16-2307-2019, https://doi.org/10.5194/bg-16-2307-2019, 2019
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We investigated air–sea gas exchange in oceanic upwelling regions for the case of nitrous oxide off Peru. In this region, routine concentration measurements from ships at 5 m or 10 m depth prove to overestimate surface (bulk) concentration. Thus, standard estimates of gas exchange will show systematic error. This is due to very shallow stratified layers that inhibit exchange between surface water and waters below and can exist for several days. Maximum bias occurs in moderate wind conditions.
Mingxi Yang, Thomas G. Bell, Ian J. Brown, James R. Fishwick, Vassilis Kitidis, Philip D. Nightingale, Andrew P. Rees, and Timothy J. Smyth
Biogeosciences, 16, 961–978, https://doi.org/10.5194/bg-16-961-2019, https://doi.org/10.5194/bg-16-961-2019, 2019
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We quantify the emissions and uptake of the greenhouse gases carbon dioxide and methane from the coastal seas of the UK over 1 year using the state-of-the-art eddy covariance technique. Our measurements show how these air–sea fluxes vary twice a day (tidal), diurnally (circadian) and seasonally. We also estimate the air–sea gas transfer velocity, which is essential for modelling and predicting coastal air-sea exchange.
Riley X. Brady, Nicole S. Lovenduski, Michael A. Alexander, Michael Jacox, and Nicolas Gruber
Biogeosciences, 16, 329–346, https://doi.org/10.5194/bg-16-329-2019, https://doi.org/10.5194/bg-16-329-2019, 2019
Stelios Myriokefalitakis, Akinori Ito, Maria Kanakidou, Athanasios Nenes, Maarten C. Krol, Natalie M. Mahowald, Rachel A. Scanza, Douglas S. Hamilton, Matthew S. Johnson, Nicholas Meskhidze, Jasper F. Kok, Cecile Guieu, Alex R. Baker, Timothy D. Jickells, Manmohan M. Sarin, Srinivas Bikkina, Rachel Shelley, Andrew Bowie, Morgane M. G. Perron, and Robert A. Duce
Biogeosciences, 15, 6659–6684, https://doi.org/10.5194/bg-15-6659-2018, https://doi.org/10.5194/bg-15-6659-2018, 2018
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The first atmospheric iron (Fe) deposition model intercomparison is presented in this study, as a result of the deliberations of the United Nations Joint Group of Experts on the Scientific Aspects of Marine Environmental Protection (GESAMP; http://www.gesamp.org/) Working Group 38. We conclude that model diversity over remote oceans reflects uncertainty in the Fe content parameterizations of dust aerosols, combustion aerosol emissions and the size distribution of transported aerosol Fe.
Liliane Merlivat, Jacqueline Boutin, David Antoine, Laurence Beaumont, Melek Golbol, and Vincenzo Vellucci
Biogeosciences, 15, 5653–5662, https://doi.org/10.5194/bg-15-5653-2018, https://doi.org/10.5194/bg-15-5653-2018, 2018
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The fugacity of carbon dioxide in seawater (fCO2) was measured hourly in the surface waters of the NW Mediterranean Sea during two 3-year sequences separated by 18 years. A decrease of pH of 0.0022 yr−1 was computed. About 85 % of the accumulation of dissolved inorganic carbon (DIC) comes from chemical equilibration with increasing atmospheric CO2; the remaining 15 % accumulation is consistent with estimates of transfer of Atlantic waters through the Gibraltar Strait.
Amanda R. Fay, Nicole S. Lovenduski, Galen A. McKinley, David R. Munro, Colm Sweeney, Alison R. Gray, Peter Landschützer, Britton B. Stephens, Taro Takahashi, and Nancy Williams
Biogeosciences, 15, 3841–3855, https://doi.org/10.5194/bg-15-3841-2018, https://doi.org/10.5194/bg-15-3841-2018, 2018
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The Southern Ocean is highly under-sampled and since this region dominates the ocean sink for CO2, understanding change is critical. Here we utilize available observations to evaluate how the seasonal cycle, variability, and trends in surface ocean carbon in the well-sampled Drake Passage region compare to that of the broader subpolar Southern Ocean. Results indicate that the Drake Passage is representative of the broader region; however, additional winter observations would improve comparisons.
Cui-Ci Sun, Martin Sperling, and Anja Engel
Biogeosciences, 15, 3577–3589, https://doi.org/10.5194/bg-15-3577-2018, https://doi.org/10.5194/bg-15-3577-2018, 2018
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Biogenic gel particles such as transparent exopolymer particles (TEP) and Coomassie stainable particles (CSP) are important components in the sea-surface microlayer (SML). Their potential role in air–sea gas exchange and in primary organic aerosol emission has generated considerable research interest. Our wind wave channel experiment revealed how wind speed controls the accumulation and size distribution of biogenic gel particles in the SML.
N. Precious Mongwe, Marcello Vichi, and Pedro M. S. Monteiro
Biogeosciences, 15, 2851–2872, https://doi.org/10.5194/bg-15-2851-2018, https://doi.org/10.5194/bg-15-2851-2018, 2018
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Here we analyze seasonal cycle of CO2 biases in 10 CMIP5 models in the SO. We find two main model biases; exaggeration of primary production such that biologically driven DIC changes mainly regulates FCO2 variability, and an overestimation of the role of solubility, such that changes in temperature dominantly drive FCO2 seasonal changes to an extent of opposing biological CO2 uptake in spring. CMIP5 models show greater zonal homogeneity in the seasonal cycle of FCO2 than observational products.
Allison R. Moreno, George I. Hagstrom, Francois W. Primeau, Simon A. Levin, and Adam C. Martiny
Biogeosciences, 15, 2761–2779, https://doi.org/10.5194/bg-15-2761-2018, https://doi.org/10.5194/bg-15-2761-2018, 2018
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To bridge the missing links between variable marine elemental stoichiometry, phytoplankton physiology and carbon cycling, we embed four environmentally controlled stoichiometric models into a five-box ocean model. As predicted each model varied in its influence on the biological pump. Surprisingly, we found that variation can lead to nonlinear controls on atmospheric CO2 and carbon export, suggesting the need for further studies of ocean C : P and the impact on ocean carbon cycling.
Luke Gregor, Schalk Kok, and Pedro M. S. Monteiro
Biogeosciences, 15, 2361–2378, https://doi.org/10.5194/bg-15-2361-2018, https://doi.org/10.5194/bg-15-2361-2018, 2018
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The Southern Ocean accounts for a large portion of the variability in oceanic CO2 uptake. However, the drivers of these changes are not understood due to a lack of observations. In this study, we used an ensemble of gap-filling methods to estimate surface CO2. We found that winter was a more important driver of longer-term variability driven by changes in wind stress. Summer variability of CO2 was driven primarily by increases in primary production.
Erik T. Buitenhuis, Parvadha Suntharalingam, and Corinne Le Quéré
Biogeosciences, 15, 2161–2175, https://doi.org/10.5194/bg-15-2161-2018, https://doi.org/10.5194/bg-15-2161-2018, 2018
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Thanks to decreases in CFC concentrations, N2O is now the third-most important greenhouse gas, and the dominant contributor to stratospheric ozone depletion. Here we estimate the ocean–atmosphere N2O flux. We find that an estimate based on observations alone has a large uncertainty. By combining observations and a range of model simulations we find that the uncertainty is much reduced to 2.45 ± 0.8 Tg N yr−1, and better constrained and at the lower end of the estimate in the latest IPCC report.
Sayaka Yasunaka, Eko Siswanto, Are Olsen, Mario Hoppema, Eiji Watanabe, Agneta Fransson, Melissa Chierici, Akihiko Murata, Siv K. Lauvset, Rik Wanninkhof, Taro Takahashi, Naohiro Kosugi, Abdirahman M. Omar, Steven van Heuven, and Jeremy T. Mathis
Biogeosciences, 15, 1643–1661, https://doi.org/10.5194/bg-15-1643-2018, https://doi.org/10.5194/bg-15-1643-2018, 2018
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We estimated monthly air–sea CO2 fluxes in the Arctic Ocean and its adjacent seas north of 60° N from 1997 to 2014, after mapping pCO2 in the surface water using a self-organizing map technique. The addition of Chl a as a parameter enabled us to improve the estimate of pCO2 via better representation of its decline in spring. The uncertainty in the CO2 flux estimate was reduced, and a net annual Arctic Ocean CO2 uptake of 180 ± 130 Tg C y−1 was determined to be significant.
Alizée Roobaert, Goulven G. Laruelle, Peter Landschützer, and Pierre Regnier
Biogeosciences, 15, 1701–1720, https://doi.org/10.5194/bg-15-1701-2018, https://doi.org/10.5194/bg-15-1701-2018, 2018
Chao Zhang, Huiwang Gao, Xiaohong Yao, Zongbo Shi, Jinhui Shi, Yang Yu, Ling Meng, and Xinyu Guo
Biogeosciences, 15, 749–765, https://doi.org/10.5194/bg-15-749-2018, https://doi.org/10.5194/bg-15-749-2018, 2018
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This study compares the response of phytoplankton growth in the northwest Pacific to those in the Yellow Sea. In general, larger positive responses of phytoplankton induced by combined nutrients (in the subtropical gyre of the northwest Pacific) than those induced by a single nutrient (in the Kuroshio Extension and the Yellow Sea) from the dust are observed. We also emphasize the importance of an increase in bioavailable P stock for phytoplankton growth following dust addition.
Goulven G. Laruelle, Peter Landschützer, Nicolas Gruber, Jean-Louis Tison, Bruno Delille, and Pierre Regnier
Biogeosciences, 14, 4545–4561, https://doi.org/10.5194/bg-14-4545-2017, https://doi.org/10.5194/bg-14-4545-2017, 2017
Melchor González-Dávila, J. Magdalena Santana Casiano, and Francisco Machín
Biogeosciences, 14, 3859–3871, https://doi.org/10.5194/bg-14-3859-2017, https://doi.org/10.5194/bg-14-3859-2017, 2017
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The Mauritanian–Cap Vert upwelling is shown to be sensitive to climate change forcing on upwelling processes, which strongly affects the CO2 surface distribution, ocean acidification rates, and air–sea CO2 exchange. We confirmed an upwelling intensification, an increase in the CO2 outgassing, and an important decrease in the pH of the surface waters. Upwelling areas are poorly studied and VOS lines are shown as one of the most significant contributors to our knowledge of the ocean's response.
Rachel Hussherr, Maurice Levasseur, Martine Lizotte, Jean-Éric Tremblay, Jacoba Mol, Helmuth Thomas, Michel Gosselin, Michel Starr, Lisa A. Miller, Tereza Jarniková, Nina Schuback, and Alfonso Mucci
Biogeosciences, 14, 2407–2427, https://doi.org/10.5194/bg-14-2407-2017, https://doi.org/10.5194/bg-14-2407-2017, 2017
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This study assesses the impact of ocean acidification on phytoplankton and its synthesis of the climate-active gas dimethyl sulfide (DMS), as well as its modulation, by two contrasting light regimes in the Arctic. The light regimes tested had no significant impact on either the phytoplankton or DMS concentration, whereas both variables decreased linearly with the decrease in pH. Thus, a rapid decrease in surface water pH could alter the algal biomass and inhibit DMS production in the Arctic.
Hilton B. Swan, Graham B. Jones, Elisabeth S. M. Deschaseaux, and Bradley D. Eyre
Biogeosciences, 14, 229–239, https://doi.org/10.5194/bg-14-229-2017, https://doi.org/10.5194/bg-14-229-2017, 2017
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We measured the sulfur gas dimethylsulfide (DMS) in marine air at a coral cay on the Great Barrier Reef. DMS is well known to be released from the world's oceans, but environmental evidence of coral reefs releasing DMS has not been clearly demonstrated. We showed the coral reef can sometimes release DMS to the air, which was seen as spikes above the DMS released from the ocean. The DMS from the reef supplements the DMS from the ocean to assist formation of clouds that influence local climate.
Stelios Myriokefalitakis, Athanasios Nenes, Alex R. Baker, Nikolaos Mihalopoulos, and Maria Kanakidou
Biogeosciences, 13, 6519–6543, https://doi.org/10.5194/bg-13-6519-2016, https://doi.org/10.5194/bg-13-6519-2016, 2016
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The global atmospheric cycle of P is simulated accounting for natural and anthropogenic sources, acid dissolution of dust aerosol and changes in atmospheric acidity. Simulations show that P-containing dust dissolution flux may have increased in the last 150 years but is expected to decrease in the future, and biological particles are important carriers of bioavailable P to the ocean. These insights to the P cycle have important implications for marine ecosystem responses to climate change.
Timothée Bourgeois, James C. Orr, Laure Resplandy, Jens Terhaar, Christian Ethé, Marion Gehlen, and Laurent Bopp
Biogeosciences, 13, 4167–4185, https://doi.org/10.5194/bg-13-4167-2016, https://doi.org/10.5194/bg-13-4167-2016, 2016
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The global coastal ocean took up 0.1 Pg C yr−1 of anthropogenic carbon during 1993–2012 based on new biogeochemical simulations with an eddying 3-D global model. That is about half of the most recent estimate, an extrapolation based on surface areas. It should not be confused with the continental shelf pump, perhaps 10 times larger, which includes natural as well as anthropogenic carbon. Coastal uptake of anthropogenic carbon is limited by its offshore transport.
Corinne Le Quéré, Erik T. Buitenhuis, Róisín Moriarty, Séverine Alvain, Olivier Aumont, Laurent Bopp, Sophie Chollet, Clare Enright, Daniel J. Franklin, Richard J. Geider, Sandy P. Harrison, Andrew G. Hirst, Stuart Larsen, Louis Legendre, Trevor Platt, I. Colin Prentice, Richard B. Rivkin, Sévrine Sailley, Shubha Sathyendranath, Nick Stephens, Meike Vogt, and Sergio M. Vallina
Biogeosciences, 13, 4111–4133, https://doi.org/10.5194/bg-13-4111-2016, https://doi.org/10.5194/bg-13-4111-2016, 2016
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We present a global biogeochemical model which incorporates ecosystem dynamics based on the representation of ten plankton functional types, and use the model to assess the relative roles of iron vs. grazing in determining phytoplankton biomass in the Southern Ocean. Our results suggest that observed low phytoplankton biomass in the Southern Ocean during summer is primarily explained by the dynamics of the Southern Ocean zooplankton community, despite iron limitation of phytoplankton growth.
Cited articles
Alegria Zufia, J., Farnelid, H., and Legrand, C: Seasonality of Coastal
Picophytoplankton Growth, Nutrient Limitation, and Biomass Contribution,
Front. Microbiol., 12, 1–13,
https://doi.org/10.3389/fmicb.2021.786590, 2021.
Amon, R. M. W. and Benner, R.: Combined neutral sugars as indicators of the
diagenetic state of dissolved organic matter in the Arctic Ocean, Deep-Sea
Res. Pt. I, 50, 151–169,
https://doi.org/10.1016/S0967-0637(02)00130-9, 2003.
Amon, R. M. W., Fitznar, H. P., and Benner, R.: Linkages among the
bioreactivity, chemical composition, and diagenetic state of marine
dissolved organic matter, Limnol. Oceanogr., 46, 287–297,
https://doi.org/10.4319/lo.2001.46.2.0287, 2001.
Apple, J. K., Strom, S. L., Palenik, B., and Brahamsha, B.: Variability in
protist grazing and growth on different marine Synechococcus isolates, Appl.
Environ. Microbiol., 77, 3074–3084,
https://doi.org/10.1128/AEM.02241-10, 2011.
Bange, H. W.: Nitrous oxide and methane in European coastal waters, Estuar.
Coast. Shelf Sci., 70, 361–374,
https://doi.org/10.1016/j.ecss.2006.05.042, 2006.
Barthelmeß, T. and Engel, A.: Biopolymer composition and surface activity in the surface waters in Eckernförde bay in summer 2018, PANGAEA [data set], https://doi.pangaea.de/10.1594/PANGAEA.947802, 2022.
Barthelmeß, T., Schütte, F., and Engel, A.: Variability of the Sea
Surface Microlayer Across a Filament's Edge and Potential Influences on Gas
Exchange, Front. Mar. Sci., 8, 718384, https://doi.org/10.3389/fmars.2021.718384,
2021.
Becker, S., Tebben, J., Coffinet, S., Wiltshire, K., Iversen, M. H., Harder,
T., Hinrichs, K. U., and Hehemann, J. H.: Laminarin is a major molecule in
the marine carbon cycle, P. Natl. Acad. Sci. USA, 117, 6599–6607,
https://doi.org/10.1073/pnas.1917001117, 2020.
Benner, R. and Amon, R. M. W.: The Size-Reactivity Continuum of Major
Bioelements in the Ocean, Ann. Rev. Mar. Sci., 7, 185–205,
https://doi.org/10.1146/annurev-marine-010213-135126, 2015.
Biggs, T. E. G., Huisman, J., and Brussaard, C. P. D.: Viral lysis modifies seasonal phytoplankton dynamics and carbon flow in the Southern Ocean, ISME J., 15, 3615–3622, https://doi.org/10.1038/s41396-021-01033-6, 2021.
Blanchet, F. G., Legendre, P., and Borcard, D.: Modelling directional spatial
processes in ecological data, Ecol. Model., 215, 325–336,
https://doi.org/10.1016/j.ecolmodel.2008.04.001, 2008.
Bock, E. J. and Frew, N. M.: Static and dynamic response of natural
multicomponent oceanic surface films to compression and dilation. Laboratory
and field observations, J. Geophys. Res., 98, 14599–14617,
https://doi.org/10.1029/93jc00428, 1993.
Borchard, C. and Engel, A.: Size-fractionated dissolved primary production and carbohydrate composition of the coccolithophore Emiliania huxleyi, Biogeosciences, 12, 1271–1284, https://doi.org/10.5194/bg-12-1271-2015, 2015.
Bordes, R. and Holmberg, K.: Amino acid-based surfactants – Do they deserve
more attention? Adv. Colloid Interface Sci., 222, 79–91,
https://doi.org/10.1016/j.cis.2014.10.013, 2015.
Bunse, C., Israelsson, S., Baltar, F., Bertos-Fortis, M., Fridolfsson, E.,
Legrand, C., Lindehoff, E., Lindh, M. V., Martínez-García, S., and
Pinhassi, J.: High frequency multi-year variability in baltic sea microbial
plankton stocks and activities, Front. Microbiol., 10, 1–18,
https://doi.org/10.3389/fmicb.2018.03296, 2019.
Calleja, M. Ll., Duarte, C. M., Prairie, Y. T., Agustí, S., and Herndl, G. J.: Evidence for surface organic matter modulation of air-sea CO2 gas exchange, Biogeosciences, 6, 1105–1114, https://doi.org/10.5194/bg-6-1105-2009, 2009.
Carlson, D. J.: The Early Diagenesis of Organic Matter: Reaction at the Air-Sea Interface, in: Organic Geochemistry, edited by: Engel, M. H. and Macko, S. A., Springer, Boston, MA, Topics in Geobiology, Vol. 11, https://doi.org/10.1007/978-1-4615-2890-6_12, 1993.
Carpenter, L. J. and Nightingale, P. D.: Chemistry and Release of Gases
from the Surface Ocean, Chem. Rev., 115, 4015–4034,
https://doi.org/10.1021/cr5007123, 2015.
Connell, P. E., Ribalet, F., Armbrust, E. V., White, A., and Caron, D. A.:
Diel oscillations in the feeding activity of heterotrophic and mixotrophic
nanoplankton in the North Pacific Subtropical Gyre, Aquat. Microb. Ecol.,
85, 167–181, https://doi.org/10.3354/AME01950, 2020.
Ćosović, B. and Vojvodić, V.: The application of ac
polarography to the determination of surface-active substances in seawater,
Limn. Oceanogr., 27, 361–369, https://doi.org/10.4319/lo.1982.27.2.0361,
1982.
Ćosović, B. and Vojvodić, V.: Voltammetric Analysis of
Surface Active Substances in Natural Seawater, Electroanalysis, 10,
429–434, https://doi.org/10.1002/(SICI)1521-4109(199805)10:6<429::AID-ELAN429>3.0.CO;2-7, 1998.
Cowie, G. L., Hedges, J. I., and Calvert, S. E.: Sources and relative
reactivities of amino acids, neutral sugars, and lignin in an intermittently
anoxic marine environment, Geochim. Cosmochim. Ac., 56, 1963–1978,
https://doi.org/10.1016/0016-7037(92)90323-B, 1992.
Croot, P. L., Passow, U., Assmy, P., Jansen, S., and Strass, V. H.: Surface
active substances in the upper water column during a Southern Ocean Iron
Fertilization Experiment (EIFEX), Geophys. Res. Lett., 34, 1–5,
https://doi.org/10.1029/2006GL028080, 2007.
Cunliffe, M. and Murrell, J. C.: The sea-surface microlayer is a gelatinous
biofilm, ISME J., 3, 1001–1003, https://doi.org/10.1038/ismej.2009.69, 2009.
Cunliffe, M. and Wurl, O.: Guide to Best Practices to Study the Ocean's
Surface, Occasional Publication of the Marine Biological Association of
the United Kingdom, https://doi.org/10.25607/OBP-1512, 2014.
Cunliffe, M. and Murrell, J.: The sea-surface microlayer is a gelatinous biofilm, ISME J., 3, 1001–1003, https://doi.org/10.1038/ismej.2009.69, 2009.
Cunliffe, M., Engel, A., Frka, S., Gašparoviæ, B. Ž., Guitart,
C., Murrell, J. C., Salter, M., Stolle, C., Upstill-Goddard, R., and Wurl,
O.: Sea surface microlayers: A unified physicochemical and biological
perspective of the air-ocean interface, Prog. Oceanogr., 109, 104–116,
https://doi.org/10.1016/j.pocean.2012.08.004, 2013.
Cuscov, M. and Muller, F. L. L.: Differentiating humic and algal surface
active substances in coastal waters by their pH-dependent adsorption
behaviour, Mar. Chem. 174, 35–45,
https://doi.org/10.1016/j.marchem.2015.05.002, 2015.
Dauwe, B. and Middelburg, J. J.: Amino acids and hexosamines as
indicators of organic matter degradation state in North Sea sediments,
Limnol. Oceanogr., 43, 782–798,
https://doi.org/10.4319/lo.1998.43.5.0782, 1998.
Dauwe, B., Middelburg, J. J., Herman, P. M. J., and Heip, C. H. R.: Linking
diagenetic alteration of amino acids and bulk organic matter reactivity,
Limnol. Oceanogr., 44, 1809–1814,
https://doi.org/10.4319/lo.1999.44.7.1809, 1999.
Davis, J. and Benner, R.: Quantitative estimates of labile and semi-labile dissolved organic carbon in the western Arctic Ocean: A molecular approach, Limnol. Oceanogr., 52, 2434–2444, https://doi.org/10.4319/lo.2007.52.6.2434, 2007.
Davis, J., Kaiser, K., and Benner, R.: Amino acid and amino sugar yields and
compositions as indicators of dissolved organic matter diagenesis, Org.
Geochem., 40, 343–352, https://doi.org/10.1016/j.orggeochem.2008.12.003,
2009.
Decho, A. W. and Gutierrez, T.: Microbial extracellular polymeric
substances (EPSs) in ocean systems, Front. Microbiol., 8, 1–28,
https://doi.org/10.3389/fmicb.2017.00922, 2017.
Dittmar, T., Paeng, J., and Ludwichowski, K.-U.: The Analysis of Amino Acids
in Seawater, in: Practical Guidelines for the Analysis of
Seawater, edited by: Wurl, O., CRC Press, 67–77, https://doi.org/10.1201/9781420073072.ch4, 2009.
Dreshchinskii, A. and Engel, A.: Seasonal variations of the sea surface
microlayer at the Boknis Eck Times Series Station (Baltic Sea), J. Plankton
Res., 39, 943–961, https://doi.org/10.1093/plankt/fbx055, 2017.
Edwards, K. F.: Mixotrophy in nanoflagellates across environmental gradients
in the ocean, P. Natl. Acad. Sci. USA, 116, 6211–6220,
https://doi.org/10.1073/pnas.1814860116, 2019.
Engel, A. and Galgani, L.: The organic sea-surface microlayer in the upwelling region off the coast of Peru and potential implications for air–sea exchange processes, Biogeosciences, 13, 989–1007, https://doi.org/10.5194/bg-13-989-2016, 2016.
Engel, A. and Händel, N.: A novel protocol for determining the concentration and composition of sugars in particulate and in high molecular weight dissolved organic matter (HMW-DOM) in seawater, Mar. Chem., 127, 180–191, https://doi.org/10.1016/j.marchem.2011.09.004, 2011.
Engel, A., Delille, B., Jacquet, S., Riebesell, U., Rochelle-Newall, E.,
Terbrüggen, A., and Zondervan, I.: Transparent exopolymer particles and
dissolved organic carbon production by Emiliania huxleyi exposed to
different CO2 concentrations: A mesocosm experiment, Aquat. Microb. Ecol.,
34, 93–104, https://doi.org/10.3354/ame034093, 2004.
Engel, A., Harlay, J., Piontek, J., and Chou, L.: Contribution of combined
carbohydrates to dissolved and particulate organic carbon after the spring
bloom in the northern Bay of Biscay (North-Eastern Atlantic Ocean), Cont.
Shelf Res., 45, 42–53, https://doi.org/10.1016/j.csr.2012.05.016, 2012.
Engel, A., Bange, H. W., Cunliffe, M., Burrows, S. M., Friedrichs, G.,
Galgani, L., Herrmann, H., Hertkorn, N., Johnson, M., Liss, P. S., Quinn, P.
K., Schartau, M., Soloviev, A., Stolle, C., Upstill-Goddard, R. C., van
Pinxteren, M., and Zäncker, B.: The ocean's vital skin: Toward an
integrated understanding of the sea surface microlayer, Front. Mar. Sci., 4, 1–14, https://doi.org/10.3389/fmars.2017.00165, 2017a.
Engel, A., Piontek, J., Metfies, K., Endres, S., Sprong, P., Peeken, I.,
Gäbler-Schwarz, S., and Nöthig, E. M.: Inter-annual variability of
transparent exopolymer particles in the Arctic Ocean reveals high
sensitivity to ecosystem changes, Sci. Rep., 7, 1–9,
https://doi.org/10.1038/s41598-017-04106-9, 2017b.
Engel, A., Sperling, M., Sun, C., Grosse, J., and Friedrichs, G.: Organic
matter in the surface microlayer: Insights from a wind wave channel
experiment, Front. Mar. Sci., 5, 182,
https://doi.org/10.3389/fmars.2018.00182, 2018.
Frew, N. M., Goldman, J. C., Dennett, M. R., and Johnson, A. S.: Impact of
phytoplankton-generated surfactants on air-sea gas exchange, J. Geophys.
Res., 95, 3337, https://doi.org/10.1029/jc095ic03p03337, 1990.
Frew, N. M., Nelson, R. K., McGillis, W. R., Edson, J. B., Bock, E. J., and
Hara, T.: Spatial variations in surface microlayer surfactants and their
role in modulating air-sea exchange, Geophys. Monogr. Ser., 127, 153–159,
https://doi.org/10.1029/GM127p0153, 2001.
Frka, S., Pogorzelski, S., Kozarac, Z., and Ćosović, B.:
Physicochemical signatures of natural sea films from middle adriatic
stations, J. Phys. Chem. A, 116, 6552–6559,
https://doi.org/10.1021/jp212430a, 2012.
Galgani, L. and Engel, A.: Changes in optical characteristics of surface microlayers hint to photochemically and microbially mediated DOM turnover in the upwelling region off the coast of Peru, Biogeosciences, 13, 2453–2473, https://doi.org/10.5194/bg-13-2453-2016, 2016.
Gärdes, A., Iversen, M. H., Grossart, H. P., Passow, U., and Ullrich, M.
S.: Diatom-associated bacteria are required for aggregation of Thalassiosira
weissflogii, ISME J., 5, 436–445,
https://doi.org/10.1038/ismej.2010.145, 2011.
Garrett, W. D.: Collection of slick-forming materials from the sea surface
microlayer, Limnol. Oceanogr., 10, 602–605,
https://doi.org/10.4319/lo.1965.10.4.0602, 1965.
Gasol, J. M. and Del Giorgio, P. A.: Using flow cytometry for counting
natural planktonic bacteria and understanding the structure of planktonic
bacterial communities, Sci. Mar., 64, 197–224,
https://doi.org/10.3989/scimar.2000.64n2197, 2000.
Gašparoviæ, B. and Ćosović, B.: Surface-active properties
of organic matter in the North Adriatic Sea, Estuar. Coast. Shelf Sci.,
58, 555–566, https://doi.org/10.1016/S0272-7714(03)00133-1, 2003.
Goldberg, S. J., Carlson, C. A., Brzezinski, M., Nelson, N. B., and Siegel,
D. A.: Systematic removal of neutral sugars within dissolved organic matter
across ocean basins, Geophys. Res. Lett., 38, L17606,
https://doi.org/10.1029/2011GL048620, 2011.
Grosse, J., van Breugel, P., Brussaard, C. P. D., and Boschker, H. T. S.: A biosynthesis view on nutrient stress in coastal phytoplankton, Limnol.
Oceanogr., 62, 490–506, https://doi.org/10.1002/lno.10439, 2017.
Grosse, J., Brussaard, C. P. D., and Boschker, H. T. S.: Nutrient limitation
driven dynamics of amino acids and fatty acids in coastal phytoplankton,
Limnol. Oceanogr., 64, 302–316, https://doi.org/10.1002/lno.11040, 2019.
Grujcic, V., Nuy, J. K., Salcher, M. M., Shabarova, T., Kasalicky, V.,
Boenigk, J., Jensen, M., and Simek, K.: Cryptophyta as major bacterivores in
freshwater summer plankton, ISME J., 12, 1668–1681,
https://doi.org/10.1038/s41396-018-0057-5, 2018.
Gutiérrez-Loza, L., Wallin, M. B., Sahlée, E., Nilsson, E., Bange,
H. W., Kock, A., and Rutgersson, A.: Measurement of air-sea methane fluxes
in the baltic sea using the eddy covariance method, Front. Earth Sci.
7, 1–13, https://doi.org/10.3389/feart.2019.00093, 2019.
Hama, T., Matsunaga, K., Handa, N., and Takahashi, M.: Day-night changes in
production of carbohydrate and protein by natural phytoplankton population
from Lake Biwa, Japan, J. Plankton Res., 10, 941–955,
https://doi.org/10.1093/plankt/10.5.941, 1988.
Hansell, D. A., Carlson, C. A., Repeta, D. J., and Schlitzer, R.: Dissolved organic matter in the ocean: A controversy stimulates new insights, Oceanography, 22, 202–211, https://doi.org/10.5670/oceanog.2009.109, 2009.
Harvey, G. W. and Burzell, L. A.: A simple microlayer method for small samples, Limnol. Oceanogr., 11, 156–157, https://doi.org/10.4319/lo.1972.17.1.0156, 1972.
HELCOM.: State of the Baltic Sea – Second HELCOM holistic assessment,
2011–2016, Baltic Sea Environment Proceedings, 155, 4–57, ISSN 0357-2994,
http://stateofthebalticsea.helcom.fi/pressures-and-their-status/hazardous-substances/ (last access: October 2021), 2018.
Ho, D. T., Wanninkhof, R., Schlosser, P., Ullman, D. S., Hebert, D., and
Sullivan, K. F.: Toward a universal relationship between wind speed and gas
exchange: Gas transfer velocities measured with
Hoppe, H.-G., Giesenhagen, H. C., Koppe, R., Hansen, H.-P., and Gocke, K.: Impact of change in climate and policy from 1988 to 2007 on environmental and microbial variables at the time series station Boknis Eck, Baltic Sea, Biogeosciences, 10, 4529–4546, https://doi.org/10.5194/bg-10-4529-2013, 2013.
Humborg, C., Geibel, M. C., Sun, X., McCrackin, M., Mörth, C. M.,
Stranne, C., Jakobsson, M., Gustafsson, B., Sokolov, A., Norkko, A., and
Norkko, J.: High emissions of carbon dioxide and methane from the coastal
Baltic Sea at the end of a summer heat wave, Front. Mar. Sci., 6,
1–14, https://doi.org/10.3389/fmars.2019.00493, 2019.
Ingalls, A. E., Liu, Z., and Lee, C.: Seasonal trends in the pigment and
amino acid compositions of sinking particles in biogenic CaCO3 and SiO2
dominated regions of the Pacific sector of the Southern Ocean along
170∘ W, Deep-Sea Res. Pt. I, 53, 836–859,
https://doi.org/10.1016/j.dsr.2006.01.004, 2006.
Jenkinson, I. R., Seuront, L., Ding, H., and Elias, F.: Biological
modification of mechanical properties of the sea surface microlayer,
influencing waves, ripples, foam and air-sea fluxes, Elementa Sci. Anthrop.,
6, 26, https://doi.org/10.1525/elementa.283, 2018.
Kharbush, J. J., Close, H. G., Van Mooy, B. A. S., Arnosti, C., Smittenberg,
R. H., Le Moigne, F. A. C., Mollenhauer, G., Scholz-Böttcher, B.,
Obreht, I., Koch, B. P., Becker, K. W., Iversen, M. H., and Mohr, W.:
Particulate Organic Carbon Deconstructed: Molecular and Chemical Composition
of Particulate Organic Carbon in the Ocean, Front. Mar. Sci., 7,
1–10, https://doi.org/10.3389/fmars.2020.00518, 2020.
Klais, R., Norros, V., Lehtinen, S., Tamminen, T., and Olli, K.: Community
assembly and drivers of phytoplankton functional structure, Funct. Ecol.,
31, 760–767, https://doi.org/10.1111/1365-2435.12784, 2017.
Kujawinski, E. B., Farrington, J. W., and Moffett, J. W.: Evidence for
grazing-mediated production of dissolved surface-active material by marine
protists, Mar. Chem., 77, 133–142,
https://doi.org/10.1016/S0304-4203(01)00082-2, 2002.
Kurata, N., Vella, K., Hamilton, B., Shivji, M., Soloviev, A., Matt, S.,
Tartar, A., and Perrie, W.: Surfactant-associated bacteria in the
near-surface layer of the ocean, Sci. Rep., 6, 19123,
https://doi.org/10.1038/srep19123, 2016.
Kuznetsova, M. and Lee, C.: Dissolved free and combined amino acids in
nearshore seawater, sea surface microlayers and foams: Influence of
extracellular hydrolysis, Aquat. Sci., 64, 252–268,
https://doi.org/10.1007/s00027-002-8070-0, 2002.
Laß, K. and Friedrichs, G.: Revealing structural properties of the
marine nanolayer from vibrational sum frequency generation spectra, J.
Geophys. Res.-Oceans, 116, 1–15, https://doi.org/10.1029/2010JC006609,
2011.
Laß, K., Bange, H. W., and Friedrichs, G.: Seasonal signatures in SFG vibrational spectra of the sea surface nanolayer at Boknis Eck Time Series Station (SW Baltic Sea), Biogeosciences, 10, 5325–5334, https://doi.org/10.5194/bg-10-5325-2013, 2013.
Legendre, P., and Legendre, L.: Chapter 11 – Canonical analysis, in: Numerical Ecology, edited by: Legendre, P. and Legendre, L., Elsevier, vol. 24, 625–710, https://doi.org/10.1016/B978-0-444-53868-0.50011-3, 2012.
Lennartz, S. T., Lehmann, A., Herrford, J., Malien, F., Hansen, H.-P., Biester, H., and Bange, H. W.: Long-term trends at the Boknis Eck time series station (Baltic Sea), 1957–2013: does climate change counteract the decline in eutrophication?, Biogeosciences, 11, 6323–6339, https://doi.org/10.5194/bg-11-6323-2014, 2014.
Lindroth, P. and Mopper, K.: High Performance Liquid Chromatographic
Determination of Subpicomole Amounts of Amino Acids by Precolumn
Fluorescence Derivatization with o-Phthaldialdehyde, Anal. Chem., 51,
1667–1674, https://doi.org/10.1021/ac50047a019, 1979.
Lohrberg, A., Schmale, O., Ostrovsky, I., Niemann, H., Held, P., and
Schneider von Deimling, J.: Discovery and quantification of a widespread
methane ebullition event in a coastal inlet (Baltic Sea) using a novel sonar
strategy, Sci. Rep., 10, 1–13,
https://doi.org/10.1038/s41598-020-60283-0, 2020.
Macreadie, P. I., Anton, A., Raven, J. A., Beaumont, N., Connolly, R. M.,
Friess, D. A., Kelleway, J. J., Kennedy, H., Kuwae, T., Lavery, P. S.,
Lovelock, C. E., Smale, D. A., Apostolaki, E. T., Atwood, T. B., Baldock,
J., Bianchi, T. S., Chmura, G. L., Eyre, B. D., Fourqurean, J. W., Hall-Spencer, J. M., Huxham, M., Hendriks, I. E., Krause-Jensen, D., Laffoley, D., Luisetti, T., Marbà, N., Masque, P., McGlathery, K. J., Megonigal, J. P., Murdiyarso, D., Russell, B. D., Santos, R., Serrano, O., Silliman, B. R., Watanabe, K., and Duarte, C. M.: The future of Blue Carbon science, Nat. Commun., 10, 1–13, https://doi.org/10.1038/s41467-019-11693-w, 2019.
Marie, D., Partensky, F., Jacquet, S., and Vaulot, D.: Enumeration and cell
cycle analysis of natural populations of marine picoplankton by flow
cytometry using the nucleic acid stain SYBR Green I, Appl. Environ.
Microbiol., 63, 186–193, https://doi.org/10.1128/aem.63.1.186-193.1997,
1997.
Marie, D., Shi, X. L., Rigaut-Jalabert, F., and Vaulot, D.: Use of flow
cytometric sorting to better assess the diversity of small photosynthetic
eukaryotes in the English Channel, FEMS Microbiol. Ecol., 72, 165–178,
https://doi.org/10.1111/j.1574-6941.2010.00842.x, 2010.
Mari, X., Passow, U., Migon, C., Burd, A. B., and Legendre, L.: Transparent
exopolymer particles: Effects on carbon cycling in the ocean, Prog.
Oceanogr., 151, 13–37, https://doi.org/10.1016/j.pocean.2016.11.002, 2017.
Messner, P.: Bacterial glycoproteins, Glycoconj. J., 14, 3–11,
https://doi.org/10.1023/A:1018551228663, 1997.
Miyazaki, Y., Yamashita, Y., Kawana, K., Tachibana, E., Kagami, S., Mochida,
M., Suzuki, K., and Nishioka, J.: Chemical transfer of dissolved organic
matter from surface seawater to sea spray water-soluble organic aerosol in
the marine atmosphere, Sci. Rep., 8, 1–10,
https://doi.org/10.1038/s41598-018-32864-7, 2018.
Miyazaki, Y., Suzuki, K., Tachibana, E., Yamashita, Y., Müller, A.,
Kawana, K., and Nishioka, J.: New index of organic mass enrichment in sea
spray aerosols linked with senescent status in marine phytoplankton, Sci.
Rep., 10, 1–9, https://doi.org/10.1038/s41598-020-73718-5, 2020.
Mopper, K., Zhou, J., Sri Ramana, K., Passow, U., Dam, H. G., and Drapeau,
D. T.: The role of surface-active carbohydrates in the flocculation of a
diatom bloom in a mesocosm, Deep-Sea Res. Pt. II, 42, 47–73,
https://doi.org/10.1016/0967-0645(95)00004-A, 1995.
Muñoz-Marín, M. C., Gómez-Baena, G., López-Lozano, A.,
Moreno-Cabezuelo, J. A., Díez, J., and García-Fernández, J.
M.: Mixotrophy in marine picocyanobacteria: use of organic compounds by
Prochlorococcus and Synechococcus, ISME J., 14, 1065–1073,
https://doi.org/10.1038/s41396-020-0603-9, 2020.
Mustaffa, N. I. H., Badewien, T. H., Ribas-Ribas, M., and Wurl, O.:
High-resolution observations on enrichment processes in the sea-surface
microlayer, Sci. Rep., 8, 1–12,
https://doi.org/10.1038/s41598-018-31465-8, 2018.
Mustaffa, N. I. H., Ribas-Ribas, M., Banko-Kubis, H. M., and Wurl, O.:
Global reduction of in situ CO2 transfer velocity by natural surfactants in
the sea-surface microlayer, Proc. Math. Phys. Eng. Sci., 476, 20190763,
https://doi.org/10.1098/rspa.2019.0763, 2020.
O'Dowd, C., Ceburnis, D., Ovadnevaite, J., Bialek, J., Stengel, D. B.,
Zacharias, M., Nitschke, U., Connan, S., Rinaldi, M., Fuzzi, S., Decesari,
S., Cristina Facchini, M., Marullo, S., Santoleri, R., Dell'anno, A.,
Corinaldesi, C., Tangherlini, M., and Danovaro, R.: Connecting marine
productivity to sea-spray via nanoscale biological processes: Phytoplankton
Dance or Death Disco?, Sci. Rep., 5, 1–11,
https://doi.org/10.1038/srep14883, 2015.
Ohlendieck, U., Stuhr, A., and Siegmund, H.: Nitrogen fixation by diazotrophic cyanobacteria in the Baltic Sea and transfer of the newly fixed nitrogen to picoplankton organisms, J. Marine Syst., 25, 213–219,
https://doi.org/10.1016/S0924-7963(00)00016-6, 2000.
Ortega-Retuerta, E., Passow, U., Duarte, C. M., and Reche, I.: Effects of ultraviolet B radiation on (not so) transparent exopolymer particles, Biogeosciences, 6, 3071–3080, https://doi.org/10.5194/bg-6-3071-2009, 2009.
Passow, U.: Transparent exopolymer particles (TEP) in aquatic environments,
Prog. Oceanogr., 55, 287–333,
https://doi.org/10.1016/S0079-6611(02)00138-6, 2002.
Pereira, R., Schneider-Zapp, K., and Upstill-Goddard, R. C.: Surfactant control of gas transfer velocity along an offshore coastal transect: results from a laboratory gas exchange tank, Biogeosciences, 13, 3981–3989, https://doi.org/10.5194/bg-13-3981-2016, 2016.
Pereira, R., Ashton, I., Sabbaghzadeh, B., Shutler, J. D., and
Upstill-Goddard, R. C.: Reduced air-sea CO2 exchange in the Atlantic Ocean
due to biological surfactants, Nat. Geosci., 11, 492–496,
https://doi.org/10.1038/s41561-018-0136-2, 2018.
Perinelli, D. R., Cespi, M., Casettari, L., Vllasaliu, D., Cangiotti, M.,
Ottaviani, M. F., Giorgioni, G., Bonacucina, G., and Palmieri, G. F.:
Correlation among chemical structure, surface properties and cytotoxicity of
N-acyl alanine and serine surfactants, Eur. J. Pharm. Biopharm., 109,
93–102, https://doi.org/10.1016/j.ejpb.2016.09.015, 2016.
Pogorzelski, S. J., Kogut, A. D., and Mazurek, A. Z.: Surface rheology
parameters of source-specific surfactant films as indicators of organic
matter dynamics, Hydrobiologia, 554, 67–81,
https://doi.org/10.1007/s10750-005-1007-6, 2006.
Reinthaler, T., Sintes, E., and Herndl, G. J.: Dissolved organic matter and
bacterial production and respiration in the sea-surface microlayer of the
open Atlantic and the western Mediterranean Sea, Limnol. Oceanogr., 53,
122–136, https://doi.org/10.4319/lo.2008.53.1.0122, 2008.
Rich, J. H., Ducklow, H. W., and Kirchman, D. L.: Concentrations and uptake
of neutral monosaccharides along 140∘ W in the equatorial Pacific:
Contribution of glucose to heterotrophic bacterial activity and the DOM
flux, Limnol. Oceanogr., 41, 595–604,
https://doi.org/10.4319/lo.1996.41.4.0595, 1996.
Robinson, T. B., Stolle, C., and Wurl, O.: Depth is relative: The importance
of depth for transparent exopolymer particles in the near-surface
environment, Ocean Sci., 15, 1653–1666,
https://doi.org/10.5194/os-15-1653-2019, 2019.
Románszki, L. and Telegdi, J.: Systematic study of Langmuir films of
different amino acid derivatives on several subphases, MATEC Web Conf., 98,
8–11, https://doi.org/10.1051/matecconf/20179801004, 2017.
Sabbaghzadeh, B., Upstill-Goddard, R. C., Beale, R., Pereira, R., and
Nightingale, P. D.: The Atlantic Ocean surface microlayer from 50∘ N to 50∘ S is ubiquitously enriched in surfactants at wind speeds
up to 13 m s−1, Geophys. Res. Lett., 44, 2852–2858,
https://doi.org/10.1002/2017GL072988, 2017.
Salter, M. E., Upstill-Goddard, R. C., Nightingale, P. D., Archer, S. D.,
Blomquist, B., Ho, D. T., Huebert, B., Schlosser, P., and Yang, M.: Impact
of an artificial surfactant release on air-sea gas fluxes during Deep Ocean
Gas Exchange Experiment II, J. Geophys. Res.-Oceans, 116, 1–9,
https://doi.org/10.1029/2011JC007023, 2011.
Satpute, S. K., Banat, I. M., Dhakephalkar, P. K., Banpurkar, A. G., and
Chopade, B. A.: Biosurfactants, bioemulsifiers and exopolysaccharides from
marine microorganisms, Biotechnol. Adv., 28, 436–450, https://doi.org/10.1016/j.biotechadv.2010.02.006, 2010.
Schmidt, R. and Schneider, B.: The effect of surface films on the air-sea
gas exchange in the Baltic Sea, Mar. Chem., 126, 56–62,
https://doi.org/10.1016/j.marchem.2011.03.007, 2011.
Scholz, F.: Voltammetric techniques of analysis: the essentials, ChemTexts,
1, 1–24, https://doi.org/10.1007/s40828-015-0016-y, 2015.
Seidel, M., Manecki, M., Herlemann, D. P. R., Deutsch, B., Schulz-Bull, D.,
Jürgens, K., and Dittmar, T.: Composition and transformation of
dissolved organic matter in the Baltic sea, Front. Earth Sci., 5,
1–20, https://doi.org/10.3389/feart.2017.00031, 2017.
Sekelsky, A. M. and Shreve, G. S.: Kinetic model of biosurfactant-enhanced
hexadecane biodegradation by Pseudomonas aeruginosa, Biotechnol. Bioeng.,
63, 401–409,
https://doi.org/10.1002/(SICI)1097-0290(19990520)63:4<401::AID-BIT3>3.0.CO;2-S, 1999.
Servais, P., Casamayor, E. O., Courties, C., Catala, P., Parthuisot, N., and
Lebaron, P.: Activity and diversity of bacterial cells with high and low
nucleic acid content, Aquat. Microb. Ecol., 33, 41–51,
https://doi.org/10.3354/ame033041, 2003.
Shaharom, S., Latif, M. T., Khan, M. F., Yusof, S. N. M., Sulong, N. A.,
Wahid, N. B. A., Uning, R., and Suratman, S.: Surfactants in the sea surface
microlayer, subsurface water and fine marine aerosols in different
background coastal areas, Environ. Sci. Pollut. Res., 25, 27074–27089,
https://doi.org/10.1007/s11356-018-2745-0, 2018.
Shammi, M., Pan, X., Mostofa, K. M. G., Zhang, D., and Liu, C. Q.:
Photo-flocculation of microbial mat extracellular polymeric substances and
their transformation into transparent exopolymer particles: Chemical and
spectroscopic evidences, Sci. Rep., 7, 1–12,
https://doi.org/10.1038/s41598-017-09066-8, 2017.
Song, W., Zhao, C., Mu, S., Pan, X., Zhang, D., Al-Misned, F. A., and
Mortuza, M. G.: Effects of irradiation and pH on fluorescence properties and
flocculation of extracellular polymeric substances from the cyanobacterium
Chroococcus minutus, Colloid. Surface. B, 128, 115–118,
https://doi.org/10.1016/j.colsurfb.2015.02.017, 2015.
Sperling, M., Piontek, J., Engel, A., Wiltshire, K. H., Niggemann, J.,
Gerdts, G., and Wichels, A.: Combined carbohydrates support rich communities
of particle-associated marine bacterioplankton, Front. Microbiol., 8,
1–14, https://doi.org/10.3389/fmicb.2017.00065, 2017.
Stefan, R. L. and Szeri, A. J.: Surfactant scavenging and surface
deposition by rising bubbles, J. Colloid Interface Sci., 212, 1–13,
https://doi.org/10.1006/jcis.1998.6037, 1999.
Stolle, C., Nagel, K., Labrenz, M., and Jürgens, K.: Succession of the sea-surface microlayer in the coastal Baltic Sea under natural and experimentally induced low-wind conditions, Biogeosciences, 7, 2975–2988, https://doi.org/10.5194/bg-7-2975-2010, 2010.
Stolle, C., Ribas-Ribas, M., Badewien, T. H., Barnes, J., Carpenter, L. J., Chance, R., Damgaard, L. R., Durán Quesada, A. M., Engel, A., Frka, S., Galgani, L., Gašparović, B., Gerriets, M., Hamizah Mustaffa, N. I., Herrmann, H., Kallajoki, L., Pereira, R., Radach, F., Revsbech, N. P., Rickard, P., Saint, A., Salter, M., Striebel, M., Triesch, N., Uher, G., Upstill-Goddard, R. C., van Pinxteren, M., Zäncker, B., Zieger, P., and Wurl, O.: The MILAN Campaign: Studying Diel Light Effects on the Air–Sea Interface, B. Am. Meteor. Soc., 101, E146–E166, https://doi.org/10.1175/BAMS-D-17-0329.1, 2020.
Sugimura, Y. and Suzuki, Y.: A high-temperature catalytic oxidation method for the determination of non-volatile dissolved organic carbon in seawater by direct injection of a liquid sample, Mar. Chem., 24, 105–131,
https://doi.org/10.1016/0304-4203(88)90043-6, 1988.
Sun, C.-C., Sperling, M., and Engel, A.: Effect of wind speed on the size distribution of gel particles in the sea surface microlayer: insights from a wind–wave channel experiment, Biogeosciences, 15, 3577–3589, https://doi.org/10.5194/bg-15-3577-2018, 2018.
Sun, L., Xu, C., Zhang, S., Lin, P., Schwehr, K. A., Quigg, A., Chiu, M. H.,
Chin, W. C., and Santschi, P. H.: Light-induced aggregation of microbial
exopolymeric substances, Chemosphere, 181, 675–681,
https://doi.org/10.1016/j.chemosphere.2017.04.099, 2017.
Thornton, D. C. O.: Dissolved organic matter (DOM) release by phytoplankton
in the contemporary and future ocean, Eur. J. Phycol., 49, 20–46,
https://doi.org/10.1080/09670262.2013.875596, 2014.
Thornton, D. C. O., Brooks, S. D., and Chen, J.: Protein and carbohydrate
exopolymer particles in the sea surface microlayer (SML), Front. Mar.Sci.,
3, 1–14, https://doi.org/10.3389/fmars.2016.00135, 2016.
van Pinxteren, M., Müller, C., Iinuma, Y., Stolle, C., and Herrmann, H.:
Chemical characterization of dissolved organic compounds from coastal sea
surface microlayers (Baltic Sea, Germany), Environ. Sci. Technol., 46,
10455–10462, https://doi.org/10.1021/es204492b, 2012.
van Pinxteren, M., Barthel, S., Fomba, K. W., Müller, K., Von
Tümpling, W., and Herrmann, H.: The influence of environmental drivers
on the enrichment of organic carbon in the sea surface microlayer and in
submicron aerosol particles – measurements from the Atlantic Ocean,
Elementa, 5, 35, https://doi.org/10.1525/elementa.225, 2017.
van Pinxteren, M., Fomba, K. W., Triesch, N., Stolle, C., Wurl, O., Bahlmann, E., Gong, X., Voigtländer, J., Wex, H., Robinson, T.-B., Barthel, S., Zeppenfeld, S., Hoffmann, E. H., Roveretto, M., Li, C., Grosselin, B., Daële, V., Senf, F., van Pinxteren, D., Manzi, M., Zabalegui, N., Frka, S., Gašparović, B., Pereira, R., Li, T., Wen, L., Li, J., Zhu, C., Chen, H., Chen, J., Fiedler, B., von Tümpling, W., Read, K. A., Punjabi, S., Lewis, A. C., Hopkins, J. R., Carpenter, L. J., Peeken, I., Rixen, T., Schulz-Bull, D., Monge, M. E., Mellouki, A., George, C., Stratmann, F., and Herrmann, H.: Marine organic matter in the remote environment of the Cape Verde islands – an introduction and overview to the MarParCloud campaign, Atmos. Chem. Phys., 20, 6921–6951, https://doi.org/10.5194/acp-20-6921-2020, 2020.
Veuger, B., Van Oevelen, D., Boschker, H. T. S., and Middelburg, J. J.: Fate
of peptidoglycan in an intertidal sediment: An in situ 13C-labeling study,
Limnol. Oceanogr., 51, 1572–1580,
https://doi.org/10.4319/lo.2006.51.4.1572, 2006.
Wasmund, N.:. Occurrence of cyanobacterial blooms in the baltic sea in
relation to environmental conditions, Internat. Rev. Hydrobiol., 82,
169–184, https://doi.org/10.1002/iroh.19970820205, 1997.
Wasmund, N., Göbel, J., and Bodungen, B. v.: 100-years-changes in the
phytoplankton community of Kiel Bight (Baltic Sea), J. Marine
Syst., 73, 300–322, https://doi.org/10.1016/j.jmarsys.2006.09.009,
2008.
Woolf, D. K., Shutler, J. D., Goddijn-Murphy, L., Watson, A. J., Chapron,
B., Nightingale, P. D., Donlon, C. J., Piskozub, J., Yelland, M. J., Ashton,
I., Holding, T., Schuster, U., Girard-Ardhuin, F., Grouazel, A., Piolle, J.
F., Warren, M., Wrobel-Niedzwiecka, I., Land, P. E., Torres, R.,
Prytherch, J., Moat, B., Hanafin, J., Ardhuin, F., and Paul, F.: Key Uncertainties in the Recent Air-Sea Flux of CO2, Global Biogeochem. Cy., 33, 1548–1563, https://doi.org/10.1029/2018GB006041, 2019.
Woźniak, B., Bradtke, K., Darecki, M., Dera, J., Dudziñska-Nowak,
J., Dzierzbicka-Głowacka, L., Ficek, D., Furmañczyk,
K., Kowalewski, M., Krezel, A., Majchrowski, R., Ostrowska, M., Paszkuta,
M., Stoñ-Egiert, J., Stramska, M., and Zapadka, T.:
SatBałtyk – a Baltic environmental satellite remote
sensing system – an ongoing project in Poland. Part 1: Assumptions, scope and
operating range, Oceanologia, 53, 897–924,
https://doi.org/10.5697/oc.53-4.897, 2011.
Wurl, O. and Holmes, M.: The gelatinous nature of the sea-surface
microlayer, Mar. Chem., 110, 89–97,
https://doi.org/10.1016/j.marchem.2008.02.009, 2008.
Wurl, O., Wurl, E., Miller, L., Johnson, K., and Vagle, S.: Formation and global distribution of sea-surface microlayers, Biogeosciences, 8, 121–135, https://doi.org/10.5194/bg-8-121-2011, 2011a.
Wurl, O., Miller, L., and Vagle, S.: Production and fate of transparent
exopolymer particles in the ocean, J. Geophys. Res.-Oceans, 116, 1–16,
https://doi.org/10.1029/2011JC007342, 2011b.
Wurl, O., Ekau, W., Landing, W. M., and Zappa, C. J.: Sea surface microlayer
in a changing ocean – A perspective, Elementa, 5, 31, https://doi.org/10.1525/elementa.228, 2017.
Yang, M., Bell, T. G., Brown, I. J., Fishwick, J. R., Kitidis, V., Nightingale, P. D., Rees, A. P., and Smyth, T. J.: Insights from year-long measurements of air–water CH4 and CO2 exchange in a coastal environment, Biogeosciences, 16, 961–978, https://doi.org/10.5194/bg-16-961-2019, 2019.
Yang, M., Smyth, T. J., Kitidis, V., Brown, I. J., Wohl, C., Yelland, M. J.,
and Bell, T. G.: Natural variability in air–sea gas transfer efficiency of
CO2, Sci. Rep., 11, 1–9, https://doi.org/10.1038/s41598-021-92947-w,
2021.
Zäncker, B., Bracher, A., Röttgers, R., and Engel, A.: Variations of
the Organic Matter Composition in the Sea Surface Microlayer: A Comparison
between Open Ocean, Coastal, and Upwelling Sites Off the Peruvian Coast,
Front. Microbiol., 8, 1–17, https://doi.org/10.3389/fmicb.2017.02369,
2017.
Zeppenfeld, S., Van Pinxteren, M., Hartmann, M., Bracher, A., Stratmann, F.,
and Herrmann, H.: Glucose as a Potential Chemical Marker for Ice Nucleating
Activity in Arctic Seawater and Melt Pond Samples, Environ. Sci. Technol.,
53, 8747–8756, https://doi.org/10.1021/acs.est.9b01469, 2019.
Zhang, Z., Liansheng, L., Zhijian, W., Jun, L., and Haibing, D.:
Physicochemical studies of the sea surface microlayer I. Thickness of the
sea surface microlayer and its experimental determination, J. Colloid
Interf. Sci., 204, 294–299, https://doi.org/10.1006/jcis.1998.5538,
1998.
Zhang, Z., Anhui, Z., Liansheng, L., Chunying, L., Chunyan, R., and Lei, X.:
Viscosity of sea surface microlayer in Jiaozhou Bay and adjacent sea area,
Chin. J. Oceanol. Limnol., 21, 351–357, https://doi.org/10.1007/bf02860431, 2003a.
Zhang, Z., Liu, L., Liu, C., and Cai, W.: Studies on the sea surface
microlayer: II. The layer of sudden change of physical and chemical
properties, J. Colloid Interf. Sci., 264, 148–159, https://doi.org/10.1016/S0021-9797(03)00390-4, 2003b.
Ziegler, S. E. and Fogel, M. L.: Seasonal and diel relationships between
the isotopic compositions of dissolved and particulate organic matter in
freshwater ecosystems, Biogeochemistry, 64, 25–52,
https://doi.org/10.1023/A:1024989915550, 2003.
Ẑutić, V., Ćosović, B., Marčenko, E., Bihari, N., and Kršinić, F.: Surfactant production by marine phytoplankton,
Mar.Chem., 10, 505–520, https://doi.org/10.1016/0304-4203(81)90004-9,
1981.
Short summary
Greenhouse gases released by human activity cause a global rise in mean temperatures. While scientists can predict how much of these gases accumulate in the atmosphere based on not only human-derived sources but also oceanic sinks, it is rather difficult to predict the major influence of coastal ecosystems. We provide a detailed study on the occurrence, composition, and controls of substances that suppress gas exchange. We thus help to determine what controls coastal greenhouse gas fluxes.
Greenhouse gases released by human activity cause a global rise in mean temperatures. While...
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