Articles | Volume 15, issue 10
https://doi.org/10.5194/bg-15-3093-2018
© Author(s) 2018. 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-15-3093-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
18 May 2018
Research article |
| 18 May 2018
| 18 May 2018
Groundwater data improve modelling of headwater stream CO2 outgassing with a stable DIC isotope approach
Department of Geography and Geosciences, GeoZentrum Nordbayern,
Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Schlossgarten 5,
91054 Erlangen, Germany
Marcus Conrad
Department of Mathematics, Friedrich-Alexander-Universität
Erlangen-Nürnberg (FAU), Cauerstr. 11, 91058 Erlangen, Germany
Vadym Aizinger
Computing Center, Alfred Wegener Institute, Helmholtz Centre for Polar
and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany
Department of Mathematics, Friedrich-Alexander-Universität
Erlangen-Nürnberg (FAU), Cauerstr. 11, 91058 Erlangen, Germany
Alexander Prechtel
Department of Mathematics, Friedrich-Alexander-Universität
Erlangen-Nürnberg (FAU), Cauerstr. 11, 91058 Erlangen, Germany
Robert van Geldern
Department of Geography and Geosciences, GeoZentrum Nordbayern,
Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Schlossgarten 5,
91054 Erlangen, Germany
Johannes A. C. Barth
Department of Geography and Geosciences, GeoZentrum Nordbayern,
Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Schlossgarten 5,
91054 Erlangen, Germany
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Aixala Gaillard, Robert van Geldern, Johannes Arthur Christopher Barth, and Christine Stumpp
EGUsphere, https://doi.org/10.5194/egusphere-2024-1968, https://doi.org/10.5194/egusphere-2024-1968, 2024
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We produced a new interpolated map of stable isotopes in groundwater in southern Germany and compared it to local precipitation. Interestingly, discrepancies were found between those two compartments of the hydrological cycle, highlighting different recharge patterns and evaporation processes in the northern and southern part of the study area. This research provides insights to understand the different groundwater recharge patterns on a large scale and eventually for groundwater management.
Marlene Dordoni, Michael Seewald, Karsten Rinke, Kurt Friese, Robert van Geldern, Jakob Schmidmeier, and Johannes A. C. Barth
Biogeosciences, 19, 5343–5355, https://doi.org/10.5194/bg-19-5343-2022, https://doi.org/10.5194/bg-19-5343-2022, 2022
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Organic matter (OM) turnover into dissolved inorganic carbon (DIC) was investigated by means of carbon isotope mass balances in Germany's largest water reservoir. This includes a metalimnetic oxygen minimum (MOM). Autochthonous particulate organic carbon (POC) was the main contributor to DIC, with rates that were highest for the MOM. Generally low turnover rates outline the environmental fragility of this water body in the case that OM loads increase due to storm events or land use changes.
Inga Köhler, Raul E. Martinez, David Piatka, Achim J. Herrmann, Arianna Gallo, Michelle M. Gehringer, and Johannes A. C. Barth
Biogeosciences, 18, 4535–4548, https://doi.org/10.5194/bg-18-4535-2021, https://doi.org/10.5194/bg-18-4535-2021, 2021
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We investigated how high Fe(II) levels influence the O2 budget of a circum-neutral Fe(II)-rich spring and if a combined study of dissolved O (DO) and its isotopic composition can help assess this effect. We showed that dissolved Fe(II) can exert strong effects on the δ18ODO even though a constant supply of atmospheric O2 occurs. In the presence of photosynthesis, direct effects of Fe oxidation become masked. Critical Fe(II) concentrations indirectly control the DO by enhancing photosynthesis.
Tobias R. Juhlke, Jürgen Sültenfuß, Katja Trachte, Frédéric Huneau, Emilie Garel, Sébastien Santoni, Johannes A. C. Barth, and Robert van Geldern
Atmos. Chem. Phys., 20, 3555–3568, https://doi.org/10.5194/acp-20-3555-2020, https://doi.org/10.5194/acp-20-3555-2020, 2020
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Tritium can serve as a useful tracer in the hydrological cycle; however, aspects of the distribution and exchange of tritium in the atmosphere are not completely understood. In particular, the movement of tritium from its natural origin in the upper atmosphere to its deposition onto the land surface by precipitation has to be quantified further. Therefore, this study collected precipitation event samples and used atmospheric models in order to improve knowledge regarding tritium dynamics.
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The Rhodes Gyre, eastern Mediterranean Sea, is the main Levantine Intermediate Water formation site. In this study, we use a 3D physical–biogeochemical model to investigate the seasonal and interannual variability of organic carbon dynamics in the gyre. Our results show its autotrophic nature and its high interannual variability, with enhanced primary production, downward exports, and onward exports to the surrounding regions during years marked by intense heat losses and deep mixed layers.
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Biogeosciences, 20, 1621–1633, https://doi.org/10.5194/bg-20-1621-2023, https://doi.org/10.5194/bg-20-1621-2023, 2023
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Biogeosciences, 20, 869–895, https://doi.org/10.5194/bg-20-869-2023, https://doi.org/10.5194/bg-20-869-2023, 2023
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Gelatinous zooplankton play a key role in the ocean carbon cycle. In particular, pelagic tunicates, which feed on a wide size range of prey, produce rapidly sinking detritus. Thus, they efficiently transfer carbon from the surface to the depths. Consequently, we added these organisms to a marine biogeochemical model (PISCES-v2) and evaluated their impact on the global carbon cycle. We found that they contribute significantly to carbon export and that this contribution increases with depth.
Shuang Gao, Jörg Schwinger, Jerry Tjiputra, Ingo Bethke, Jens Hartmann, Emilio Mayorga, and Christoph Heinze
Biogeosciences, 20, 93–119, https://doi.org/10.5194/bg-20-93-2023, https://doi.org/10.5194/bg-20-93-2023, 2023
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We assess the impact of riverine nutrients and carbon (C) on projected marine primary production (PP) and C uptake using a fully coupled Earth system model. Riverine inputs alleviate nutrient limitation and thus lessen the projected PP decline by up to 0.7 Pg C yr−1 globally. The effect of increased riverine C may be larger than the effect of nutrient inputs in the future on the projected ocean C uptake, while in the historical period increased nutrient inputs are considered the largest driver.
Valeria Di Biagio, Stefano Salon, Laura Feudale, and Gianpiero Cossarini
Biogeosciences, 19, 5553–5574, https://doi.org/10.5194/bg-19-5553-2022, https://doi.org/10.5194/bg-19-5553-2022, 2022
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The amount of dissolved oxygen in the ocean is the result of interacting physical and biological processes. Oxygen vertical profiles show a subsurface maximum in a large part of the ocean. We used a numerical model to map this subsurface maximum in the Mediterranean Sea and to link local differences in its properties to the driving processes. This emerging feature can help the marine ecosystem functioning to be better understood, also under the impacts of climate change.
Michael R. Stukel, Moira Décima, and Michael R. Landry
Biogeosciences, 19, 3595–3624, https://doi.org/10.5194/bg-19-3595-2022, https://doi.org/10.5194/bg-19-3595-2022, 2022
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The biological carbon pump (BCP) transports carbon into the deep ocean, leading to long-term marine carbon sequestration. It is driven by many physical, chemical, and ecological processes. We developed a model of the BCP constrained using data from 11 cruises in 4 different ocean regions. Our results show that sinking particles and vertical mixing are more important than transport mediated by vertically migrating zooplankton. They also highlight the uncertainty in current estimates of the BCP.
Ginevra Rosati, Donata Canu, Paolo Lazzari, and Cosimo Solidoro
Biogeosciences, 19, 3663–3682, https://doi.org/10.5194/bg-19-3663-2022, https://doi.org/10.5194/bg-19-3663-2022, 2022
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Methylmercury (MeHg) is produced and bioaccumulated in marine food webs, posing concerns for human exposure through seafood consumption. We modeled and analyzed the fate of MeHg in the lower food web of the Mediterranean Sea. The modeled spatial–temporal distribution of plankton bioaccumulation differs from the distribution of MeHg in surface water. We also show that MeHg exposure concentrations in temperate waters can be lowered by winter convection, which is declining due to climate change.
Yanda Ou, Bin Li, and Z. George Xue
Biogeosciences, 19, 3575–3593, https://doi.org/10.5194/bg-19-3575-2022, https://doi.org/10.5194/bg-19-3575-2022, 2022
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Over the past decades, the Louisiana–Texas shelf has been suffering recurring hypoxia (dissolved oxygen < 2 mg L−1). We developed a novel prediction model using state-of-the-art statistical techniques based on physical and biogeochemical data provided by a numerical model. The model can capture both the magnitude and onset of the annual hypoxia events. This study also demonstrates that it is possible to use a global model forecast to predict regional ocean water quality.
Eva Ehrnsten, Oleg Pavlovitch Savchuk, and Bo Gustav Gustafsson
Biogeosciences, 19, 3337–3367, https://doi.org/10.5194/bg-19-3337-2022, https://doi.org/10.5194/bg-19-3337-2022, 2022
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We studied the effects of benthic fauna, animals living on or in the seafloor, on the biogeochemical cycles of carbon, nitrogen and phosphorus using a model of the Baltic Sea ecosystem. By eating and excreting, the animals transform a large part of organic matter sinking to the seafloor into inorganic forms, which fuel plankton blooms. Simultaneously, when they move around (bioturbate), phosphorus is bound in the sediments. This reduces nitrogen-fixing plankton blooms and oxygen depletion.
Brandon J. McNabb and Philippe D. Tortell
Biogeosciences, 19, 1705–1721, https://doi.org/10.5194/bg-19-1705-2022, https://doi.org/10.5194/bg-19-1705-2022, 2022
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The trace gas dimethyl sulfide (DMS) plays an important role in the ocean sulfur cycle and can also influence Earth’s climate. Our study used two statistical methods to predict surface ocean concentrations and rates of sea–air exchange of DMS in the northeast subarctic Pacific. Our results show improved predictive power over previous approaches and suggest that nutrient availability, light-dependent processes, and physical mixing may be important controls on DMS in this region.
Xi Wei, Josette Garnier, Vincent Thieu, Paul Passy, Romain Le Gendre, Gilles Billen, Maia Akopian, and Goulven Gildas Laruelle
Biogeosciences, 19, 931–955, https://doi.org/10.5194/bg-19-931-2022, https://doi.org/10.5194/bg-19-931-2022, 2022
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Estuaries are key reactive ecosystems along the land–ocean aquatic continuum and are often strongly impacted by anthropogenic activities. We calculated nutrient in and out fluxes by using a 1-D transient model for seven estuaries along the French Atlantic coast. Among these, large estuaries with high residence times showed higher retention rates than medium and small ones. All reveal coastal eutrophication due to the excess of diffused nitrogen from intensive agricultural river basins.
Krysten Rutherford, Katja Fennel, Dariia Atamanchuk, Douglas Wallace, and Helmuth Thomas
Biogeosciences, 18, 6271–6286, https://doi.org/10.5194/bg-18-6271-2021, https://doi.org/10.5194/bg-18-6271-2021, 2021
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Using a regional model of the northwestern North Atlantic shelves in combination with a surface water time series and repeat transect observations, we investigate surface CO2 variability on the Scotian Shelf. The study highlights a strong seasonal cycle in shelf-wide pCO2 and spatial variability throughout the summer months driven by physical events. The simulated net flux of CO2 on the Scotian Shelf is out of the ocean, deviating from the global air–sea CO2 flux trend in continental shelves.
Frerk Pöppelmeier, David J. Janssen, Samuel L. Jaccard, and Thomas F. Stocker
Biogeosciences, 18, 5447–5463, https://doi.org/10.5194/bg-18-5447-2021, https://doi.org/10.5194/bg-18-5447-2021, 2021
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Chromium (Cr) is a redox-sensitive element that holds promise as a tracer of ocean oxygenation and biological activity. We here implemented the oxidation states Cr(III) and Cr(VI) in the Bern3D model to investigate the processes that shape the global Cr distribution. We find a Cr ocean residence time of 5–8 kyr and that the benthic source dominates the tracer budget. Further, regional model–data mismatches suggest strong Cr removal in oxygen minimum zones and a spatially variable benthic source.
Felipe S. Freitas, Philip A. Pika, Sabine Kasten, Bo B. Jørgensen, Jens Rassmann, Christophe Rabouille, Shaun Thomas, Henrik Sass, Richard D. Pancost, and Sandra Arndt
Biogeosciences, 18, 4651–4679, https://doi.org/10.5194/bg-18-4651-2021, https://doi.org/10.5194/bg-18-4651-2021, 2021
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It remains challenging to fully understand what controls carbon burial in marine sediments globally. Thus, we use a model–data approach to identify patterns of organic matter reactivity at the seafloor across distinct environmental conditions. Our findings support the notion that organic matter reactivity is a dynamic ecosystem property and strongly influences biogeochemical cycling and exchange. Our results are essential to improve predictions of future changes in carbon cycling and climate.
Josué Bock, Martine Michou, Pierre Nabat, Manabu Abe, Jane P. Mulcahy, Dirk J. L. Olivié, Jörg Schwinger, Parvadha Suntharalingam, Jerry Tjiputra, Marco van Hulten, Michio Watanabe, Andrew Yool, and Roland Séférian
Biogeosciences, 18, 3823–3860, https://doi.org/10.5194/bg-18-3823-2021, https://doi.org/10.5194/bg-18-3823-2021, 2021
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In this study we analyse surface ocean dimethylsulfide (DMS) concentration and flux to the atmosphere from four CMIP6 Earth system models over the historical and ssp585 simulations.
Our analysis of contemporary (1980–2009) climatologies shows that models better reproduce observations in mid to high latitudes. The models disagree on the sign of the trend of the global DMS flux from 1980 onwards. The models agree on a positive trend of DMS over polar latitudes following sea-ice retreat dynamics.
Mariana Hill Cruz, Iris Kriest, Yonss Saranga José, Rainer Kiko, Helena Hauss, and Andreas Oschlies
Biogeosciences, 18, 2891–2916, https://doi.org/10.5194/bg-18-2891-2021, https://doi.org/10.5194/bg-18-2891-2021, 2021
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In this study we use a regional biogeochemical model of the eastern tropical South Pacific Ocean to implicitly simulate the effect that fluctuations in populations of small pelagic fish, such as anchovy and sardine, may have on the biogeochemistry of the northern Humboldt Current System. To do so, we vary the zooplankton mortality in the model, under the assumption that these fishes eat zooplankton. We also evaluate the model for the first time against mesozooplankton observations.
Roman Bezhenar, Kyeong Ok Kim, Vladimir Maderich, Govert de With, and Kyung Tae Jung
Biogeosciences, 18, 2591–2607, https://doi.org/10.5194/bg-18-2591-2021, https://doi.org/10.5194/bg-18-2591-2021, 2021
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A new approach to predicting the accumulation of radionuclides in fish was developed by taking into account heterogeneity of distribution of contamination in the organism and dependence of metabolic process rates on the fish mass. Predicted concentrations of radionuclides in fish agreed well with the laboratory and field measurements. The model with the defined generic parameters could be used in marine environments without local calibration, which is important for emergency decision support.
Emil De Borger, Justin Tiano, Ulrike Braeckman, Adriaan D. Rijnsdorp, and Karline Soetaert
Biogeosciences, 18, 2539–2557, https://doi.org/10.5194/bg-18-2539-2021, https://doi.org/10.5194/bg-18-2539-2021, 2021
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Bottom trawling alters benthic mineralization: the recycling of organic material (OM) to free nutrients. To better understand how this occurs, trawling events were added to a model of seafloor OM recycling. Results show that bottom trawling reduces OM and free nutrients in sediments through direct removal thereof and of fauna which transport OM to deeper sediment layers protected from fishing. Our results support temporospatial trawl restrictions to allow key sediment functions to recover.
Britta Munkes, Ulrike Löptien, and Heiner Dietze
Biogeosciences, 18, 2347–2378, https://doi.org/10.5194/bg-18-2347-2021, https://doi.org/10.5194/bg-18-2347-2021, 2021
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Cyanobacteria blooms can strongly aggravate eutrophication problems of water bodies. Their controls are, however, not comprehensively understood, which impedes effective management and protection plans. Here we review the current understanding of cyanobacteria blooms. Juxtaposition of respective field and laboratory studies with state-of-the-art mathematical models reveals substantial uncertainty associated with nutrient demands, grazing, and death of cyanobacteria.
Jens Terhaar, Olivier Torres, Timothée Bourgeois, and Lester Kwiatkowski
Biogeosciences, 18, 2221–2240, https://doi.org/10.5194/bg-18-2221-2021, https://doi.org/10.5194/bg-18-2221-2021, 2021
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The uptake of carbon, emitted as a result of human activities, results in ocean acidification. We analyse 21st-century projections of acidification in the Arctic Ocean, a region of particular vulnerability, using the latest generation of Earth system models. In this new generation of models there is a large decrease in the uncertainty associated with projections of Arctic Ocean acidification, with freshening playing a greater role in driving acidification than previously simulated.
Tobias R. Vonnahme, Martial Leroy, Silke Thoms, Dick van Oevelen, H. Rodger Harvey, Svein Kristiansen, Rolf Gradinger, Ulrike Dietrich, and Christoph Völker
Biogeosciences, 18, 1719–1747, https://doi.org/10.5194/bg-18-1719-2021, https://doi.org/10.5194/bg-18-1719-2021, 2021
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Diatoms are crucial for Arctic coastal spring blooms, and their growth is controlled by nutrients and light. At the end of the bloom, inorganic nitrogen or silicon can be limiting, but nitrogen can be regenerated by bacteria, extending the algal growth phase. Modeling these multi-nutrient dynamics and the role of bacteria is challenging yet crucial for accurate modeling. We recreated spring bloom dynamics in a cultivation experiment and developed a representative dynamic model.
Rebecca M. Wright, Corinne Le Quéré, Erik Buitenhuis, Sophie Pitois, and Mark J. Gibbons
Biogeosciences, 18, 1291–1320, https://doi.org/10.5194/bg-18-1291-2021, https://doi.org/10.5194/bg-18-1291-2021, 2021
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Jellyfish have been included in a global ocean biogeochemical model for the first time. The global mean jellyfish biomass in the model is within the observational range. Jellyfish are found to play an important role in the plankton ecosystem, influencing community structure, spatiotemporal dynamics and biomass. The model raises questions about the sensitivity of the zooplankton community to jellyfish mortality and the interactions between macrozooplankton and jellyfish.
Valeria Di Biagio, Gianpiero Cossarini, Stefano Salon, and Cosimo Solidoro
Biogeosciences, 17, 5967–5988, https://doi.org/10.5194/bg-17-5967-2020, https://doi.org/10.5194/bg-17-5967-2020, 2020
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Events that influence the functioning of the Earth’s ecosystems are of interest in relation to a changing climate. We propose a method to identify and characterise
wavesof extreme events affecting marine ecosystems for multi-week periods over wide areas. Our method can be applied to suitable ecosystem variables and has been used to describe different kinds of extreme event waves of phytoplankton chlorophyll in the Mediterranean Sea, by analysing the output from a high-resolution model.
Maria Paula da Silva, Lino A. Sander de Carvalho, Evlyn Novo, Daniel S. F. Jorge, and Claudio C. F. Barbosa
Biogeosciences, 17, 5355–5364, https://doi.org/10.5194/bg-17-5355-2020, https://doi.org/10.5194/bg-17-5355-2020, 2020
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In this study, we analyze the seasonal changes in the dissolved organic matter (DOM) quality (based on its optical properties) in four Amazon floodplain lakes. DOM plays a fundamental role in surface water chemistry, controlling metal bioavailability and mobility, and nutrient cycling. The model proposed in our paper highlights the potential to study DOM quality at a wider spatial scale, which may help to better understand the persistence and fate of DOM in the ecosystem.
Zhengchen Zang, Z. George Xue, Kehui Xu, Samuel J. Bentley, Qin Chen, Eurico J. D'Sa, Le Zhang, and Yanda Ou
Biogeosciences, 17, 5043–5055, https://doi.org/10.5194/bg-17-5043-2020, https://doi.org/10.5194/bg-17-5043-2020, 2020
Taylor A. Shropshire, Steven L. Morey, Eric P. Chassignet, Alexandra Bozec, Victoria J. Coles, Michael R. Landry, Rasmus Swalethorp, Glenn Zapfe, and Michael R. Stukel
Biogeosciences, 17, 3385–3407, https://doi.org/10.5194/bg-17-3385-2020, https://doi.org/10.5194/bg-17-3385-2020, 2020
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Zooplankton are the smallest animals in the ocean and important food for fish. Despite their importance, zooplankton have been relatively undersampled. To better understand the zooplankton community in the Gulf of Mexico (GoM), we developed a model to simulate their dynamics. We found that heterotrophic protists are important for supporting mesozooplankton, which are the primary prey of larval fish. The model developed in this study has the potential to improve fisheries management in the GoM.
Iris Kriest, Paul Kähler, Wolfgang Koeve, Karin Kvale, Volkmar Sauerland, and Andreas Oschlies
Biogeosciences, 17, 3057–3082, https://doi.org/10.5194/bg-17-3057-2020, https://doi.org/10.5194/bg-17-3057-2020, 2020
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Constants of global biogeochemical ocean models are often tuned
by handto match observations of nutrients or oxygen. We investigate the effect of this tuning by optimising six constants of a global biogeochemical model, simulated in five different offline circulations. Optimal values for three constants adjust to distinct features of the circulation applied and can afterwards be swapped among the circulations, without losing too much of the model's fit to observed quantities.
Laura Haffert, Matthias Haeckel, Henko de Stigter, and Felix Janssen
Biogeosciences, 17, 2767–2789, https://doi.org/10.5194/bg-17-2767-2020, https://doi.org/10.5194/bg-17-2767-2020, 2020
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Deep-sea mining for polymetallic nodules is expected to have severe environmental impacts. Through prognostic modelling, this study aims to provide a holistic assessment of the biogeochemical recovery after a disturbance event. It was found that the recovery strongly depends on the impact type; e.g. complete removal of the surface sediment reduces seafloor nutrient fluxes over centuries.
Fabian A. Gomez, Rik Wanninkhof, Leticia Barbero, Sang-Ki Lee, and Frank J. Hernandez Jr.
Biogeosciences, 17, 1685–1700, https://doi.org/10.5194/bg-17-1685-2020, https://doi.org/10.5194/bg-17-1685-2020, 2020
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We use a numerical model to infer annual changes of surface carbon chemistry in the Gulf of Mexico (GoM). The main seasonality drivers of partial pressure of carbon dioxide and aragonite saturation state from the model are temperature and river runoff. The GoM basin is a carbon sink in winter–spring and carbon source in summer–fall, but uptake prevails near the Mississippi Delta year-round due to high biological production. Our model results show good correspondence with observational studies.
Simon J. Parker
Biogeosciences, 17, 305–315, https://doi.org/10.5194/bg-17-305-2020, https://doi.org/10.5194/bg-17-305-2020, 2020
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Dissolved oxygen (DO) models typically assume constant ecosystem respiration over the course of a single day. Using a data-driven approach, this research examines this assumption in four streams across two (hydro-)geological types (Chalk and Greensand). Despite hydrogeological equivalence in terms of baseflow index for each hydrogeological pairing, model suitability differed within, rather than across, geology types. This corresponded with associated differences in timings of DO minima.
Fabrice Lacroix, Tatiana Ilyina, and Jens Hartmann
Biogeosciences, 17, 55–88, https://doi.org/10.5194/bg-17-55-2020, https://doi.org/10.5194/bg-17-55-2020, 2020
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Contributions of rivers to the oceanic cycling of carbon have been poorly represented in global models until now. Here, we assess the long–term implications of preindustrial riverine loads in the ocean in a novel framework which estimates the loads through a hierarchy of weathering and land–ocean export models. We investigate their impacts for the oceanic biological production and air–sea carbon flux. Finally, we assess the potential incorporation of the framework in an Earth system model.
Patrick A. Rafter, Aaron Bagnell, Dario Marconi, and Timothy DeVries
Biogeosciences, 16, 2617–2633, https://doi.org/10.5194/bg-16-2617-2019, https://doi.org/10.5194/bg-16-2617-2019, 2019
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The N isotopic composition of nitrate (
nitrate δ15N) is a useful tracer of ocean N cycling and many other ocean processes. Here, we use a global compilation of marine nitrate δ15N as an input, training, and validating dataset for an artificial neural network (a.k.a.,
machine learning) and examine basin-scale trends in marine nitrate δ15N from the surface to the seafloor.
Elena Terzić, Paolo Lazzari, Emanuele Organelli, Cosimo Solidoro, Stefano Salon, Fabrizio D'Ortenzio, and Pascal Conan
Biogeosciences, 16, 2527–2542, https://doi.org/10.5194/bg-16-2527-2019, https://doi.org/10.5194/bg-16-2527-2019, 2019
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Measuring ecosystem properties in the ocean is a hard business. Recent availability of data from Biogeochemical-Argo floats can help make this task easier. Numerical models can integrate these new data in a coherent picture and can be used to investigate the functioning of ecosystem processes. Our new approach merges experimental information and model capabilities to quantitatively demonstrate the importance of light and water vertical mixing for algae dynamics in the Mediterranean Sea.
Jens Terhaar, James C. Orr, Marion Gehlen, Christian Ethé, and Laurent Bopp
Biogeosciences, 16, 2343–2367, https://doi.org/10.5194/bg-16-2343-2019, https://doi.org/10.5194/bg-16-2343-2019, 2019
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A budget of anthropogenic carbon in the Arctic Ocean, the main driver of open-ocean acidification, was constructed for the first time using a high-resolution ocean model. The budget reveals that anthropogenic carbon enters the Arctic Ocean mainly by lateral transport; the air–sea flux plays a minor role. Coarser-resolution versions of the same model, typical of earth system models, store less anthropogenic carbon in the Arctic Ocean and thus underestimate ocean acidification in the Arctic Ocean.
Taylor S. Martin, François Primeau, and Karen L. Casciotti
Biogeosciences, 16, 347–367, https://doi.org/10.5194/bg-16-347-2019, https://doi.org/10.5194/bg-16-347-2019, 2019
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Nitrite is a key intermediate in many nitrogen (N) cycling processes in the ocean, particularly in areas with low oxygen that are hotspots for N loss. We have created a 3-D global N cycle model with nitrite as a tracer. Stable isotopes of N are also included in the model and we are able to model the isotope fractionation associated with each N cycling process. Our model accurately represents N concentrations and isotope distributions in the ocean.
Camille Richon, Jean-Claude Dutay, Laurent Bopp, Briac Le Vu, James C. Orr, Samuel Somot, and François Dulac
Biogeosciences, 16, 135–165, https://doi.org/10.5194/bg-16-135-2019, https://doi.org/10.5194/bg-16-135-2019, 2019
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We evaluate the effects of climate change and biogeochemical forcing evolution on the nutrient and plankton cycles of the Mediterranean Sea for the first time. We use a high-resolution coupled physical and biogeochemical model and perform 120-year transient simulations. The results indicate that changes in external nutrient fluxes and climate change may have synergistic or antagonistic effects on nutrient concentrations, depending on the region and the scenario.
Angela M. Kuhn, Katja Fennel, and Ilana Berman-Frank
Biogeosciences, 15, 7379–7401, https://doi.org/10.5194/bg-15-7379-2018, https://doi.org/10.5194/bg-15-7379-2018, 2018
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Recent studies demonstrate that marine N2 fixation can be carried out without light. However, direct measurements of N2 fixation in dark environments are relatively scarce. This study uses a model that represents biogeochemical cycles at a deep-ocean location in the Gulf of Aqaba (Red Sea). Different model versions are used to test assumptions about N2 fixers. Relaxing light limitation for marine N2 fixers improved the similarity between model results and observations of deep nitrate and oxygen.
Prima Anugerahanti, Shovonlal Roy, and Keith Haines
Biogeosciences, 15, 6685–6711, https://doi.org/10.5194/bg-15-6685-2018, https://doi.org/10.5194/bg-15-6685-2018, 2018
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Minor changes in the biogeochemical model equations lead to major dynamical changes. We assessed this structural sensitivity for the MEDUSA biogeochemical model on chlorophyll and nitrogen concentrations at five oceanographic stations over 10 years, using 1-D ensembles generated by combining different process equations. The ensemble performed better than the default model in most of the stations, suggesting that our approach is useful for generating a probabilistic biogeochemical ensemble model.
Audrey Gimenez, Melika Baklouti, Thibaut Wagener, and Thierry Moutin
Biogeosciences, 15, 6573–6589, https://doi.org/10.5194/bg-15-6573-2018, https://doi.org/10.5194/bg-15-6573-2018, 2018
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During the OUTPACE cruise conducted in the oligotrophic to ultra-oligotrophic region of the western tropical South Pacific, two contrasted regions were sampled in terms of N2 fixation rates, primary production rates and nutrient availability. The aim of this work was to investigate the role of N2 fixation in the differences observed between the two contrasted areas by comparing two simulations only differing by the presence or not of N2 fixers using a 1-D biogeochemical–physical coupled model.
Jenny Hieronymus, Kari Eilola, Magnus Hieronymus, H. E. Markus Meier, Sofia Saraiva, and Bengt Karlson
Biogeosciences, 15, 5113–5129, https://doi.org/10.5194/bg-15-5113-2018, https://doi.org/10.5194/bg-15-5113-2018, 2018
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This paper investigates how phytoplankton concentrations in the Baltic Sea co-vary with nutrient concentrations and other key variables on inter-annual timescales in a model integration over the years 1850–2008. The study area is not only affected by climate change; it has also been subjected to greatly increased nutrient loads due to extensive use of agricultural fertilizers. The results indicate the largest inter-annual coherence of phytoplankton with the limiting nutrient.
Cyril Dutheil, Olivier Aumont, Thomas Gorguès, Anne Lorrain, Sophie Bonnet, Martine Rodier, Cécile Dupouy, Takuhei Shiozaki, and Christophe Menkes
Biogeosciences, 15, 4333–4352, https://doi.org/10.5194/bg-15-4333-2018, https://doi.org/10.5194/bg-15-4333-2018, 2018
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N2 fixation is recognized as one of the major sources of nitrogen in the ocean. Thus, N2 fixation sustains a significant part of the primary production (PP) by supplying the most common limiting nutrient for phytoplankton growth. From numerical simulations, the local maximums of Trichodesmium biomass in the Pacific are found around islands, explained by the iron fluxes from island sediments. We assessed that 15 % of the PP may be due to Trichodesmium in the low-nutrient, low-chlorophyll areas.
Akitomo Yamamoto, Ayako Abe-Ouchi, and Yasuhiro Yamanaka
Biogeosciences, 15, 4163–4180, https://doi.org/10.5194/bg-15-4163-2018, https://doi.org/10.5194/bg-15-4163-2018, 2018
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Millennial-scale changes in oceanic CO2 uptake due to global warming are simulated by a GCM and offline biogeochemical model. Sensitivity studies show that decreases in oceanic CO2 uptake are mainly caused by a weaker biological pump and seawater warming. Enhanced CO2 uptake due to weaker equatorial upwelling cancels out reduced CO2 uptake due to weaker AMOC and AABW formation. Thus, circulation change plays only a small direct role in reduction of CO2 uptake due to global warming.
Cited articles
Amiotte-Suchet, P., Aubert, D., Probst, J. L., Gauthier-Lafaye, F., Probst,
A., Andreux, F., and Viville, D.: δ13C pattern of dissolved
inorganic carbon in a small granitic catchment: the Strengbach case study
(Vosges mountains, France), Chem. Geol., 159, 129–145,
https://doi.org/10.1016/S0009-2541(99)00037-6, 1999.
Amundson, R. G. and Davidson, E. A.: Carbon-Dioxide and Nitrogenous Gases in
the Soil Atmosphere, J. Geochem. Explor., 38, 13–41,
https://doi.org/10.1016/0375-6742(90)90091-N, 1990.
Aufdenkampe, A. K., Mayorga, E., Raymond, P. A., Melack, J. M., Doney, S. C.,
Alin, S. R., Aalto, R. E., and Yoo, K.: Riverine coupling of biogeochemical
cycles between land, oceans, and atmosphere, Front. Ecol. Environ., 9,
53–60, https://doi.org/10.1890/100014, 2011.
Barth, J. A. C., Mader, M., Nenning, F., van Geldern, R., and Friese, K.:
Stable isotope mass balances versus concentration differences of dissolved
inorganic carbon – implications for tracing carbon turnover in reservoirs,
Isot. Environ. Healt. S., 13, 1–14, https://doi.org/10.1080/10256016.2017.1282478, 2017.
Bastviken, D., Sundgren, I., Natchimuthu, S., Reyier, H., and Galfalk, M.:
Technical Note: Cost-efficient approaches to measure carbon dioxide
(CO2) fluxes and concentrations in terrestrial and aquatic environments
using mini loggers, Biogeosciences, 12, 3849–3859,
https://doi.org/10.5194/bg-12-3849-2015, 2015.
Billett, M. F., Palmer, S. M., Hope, D., Deacon, C., Storeton-West, R.,
Hargreaves, K. J., Flechard, C., and Fowler, D.: Linking
land-atmosphere-stream carbon fluxes in a lowland peatland system, Global
Biogeochem. Cy., 18, 1–12, 2004.
Bishop, K., Buffam, I., Erlandsson, M., Folster, J., Laudon, H., Seibert, J.,
and Temnerud, J.: Aqua Incognita: the unknown headwaters, Hydrol. Process.,
22, 1239–1242, https://doi.org/10.1002/Hyp.7049, 2008.
Boodoo, K. S., Trauth, N., Schmidt, C., Schelker, J., and Battin, T. J.:
Gravel bars are sites of increased CO2 outgassing in stream corridors,
Sci. Rep., 7, 1–9, https://doi.org/10.1038/s41598-017-14439-0, 2017.
Butman, D. and Raymond, P. A.: Significant efflux of carbon dioxide from
streams and rivers in the United States, Nat. Geosci., 4, 839–842,
https://doi.org/10.1038/Ngeo1294, 2011.
Campeau, A., Lapierre, J. F., Vachon, D., and del Giorgio, P. A.: Regional
contribution of CO2 and CH4 fluxes from the fluvial network in a
lowland boreal landscape of Quebec, Global Biogeochem. Cy., 28, 57–69,
https://doi.org/10.1002/2013gb004685, 2014.
Catalan, N., Marce, R., Kothawala, D. N., and Tranvik, L. J.: Organic carbon
decomposition rates controlled by water retention time across inland waters,
Nat. Geosci., 9, 501–504, https://doi.org/10.1038/Ngeo2720, 2016.
Cole, J. J., Prairie, Y. T., Caraco, N. F., McDowell, W. H., Tranvik, L. J.,
Striegl, R. G., Duarte, C. M., Kortelainen, P., Downing, J. A., Middelburg,
J. J., and Melack, J.: Plumbing the global carbon cycle: Integrating inland
waters into the terrestrial carbon budget, Ecosystems, 10, 171–184,
https://doi.org/10.1007/S10021-006-9013-8, 2007.
Coplen, T. B.: Guidelines and recommended terms for expression of
stable-isotope-ratio and gas-ratio measurement results, Rapid Commun. Mass
Spectrom., 25, 2538–2560, https://doi.org/10.1002/rcm.5129, 2011.
Crawford, J. T., Striegl, R. G., Wickland, K. P., Dornblaser, M. M., and
Stanley, E. H.: Emissions of carbon dioxide and methane from a headwater
stream network of interior Alaska, J. Geophys. Res.-Biogeo., 118, 482–494,
https://doi.org/10.1002/Jgrg.20034, 2013.
Davidson, E. A., Figueiredo, R. O., Markewitz, D., and Aufdenkampe, A. K.:
Dissolved CO2 in small catchment streams of eastern Amazonia: A minor
pathway of terrestrial carbon loss, J. Geophys. Res.-Biogeo., 115, 1–6,
https://doi.org/10.1029/2009jg001202, 2010.
Demars, B. O. L., Manson, J. R., Olafsson, J. S., Gislason, G. M.,
Gudmundsdottir, R., Woodward, G., Reiss, J., Pichler, D. E., Rasmussen, J.
J., and Friberg, N.: Temperature and the metabolic balance of streams,
Freshwater Biol., 56, 1106–1121, https://doi.org/10.1111/j.1365-2427.2010.02554.x, 2011.
Dickson, A. G., Sabine, C. L., and Christian, J. R. (Eds.): Guide to best
practices for ocean CO2 measurements, PICES Special Publication 3, 191
pp., available at:
https://www.nodc.noaa.gov/ocads/oceans/Handbook_2007.html (last access:
25 December 2018), 2007.
Dinsmore, K. J. and Billett, M. F.: Continuous measurement and modeling of
CO2 losses from a peatland stream during stormflow events, Water Resour.
Res., 44, W12417, https://doi.org/10.1029/2008wr007284, 2008.
Dusek, J., Vogel, T., and Sanda, M.: Hillslope hydrograph analysis using
synthetic and natural oxygen-18 signatures, J. Hydrol., 475, 415–427, 2012.
Earth System Research Laboratory: National Oceanic and Atmospheric
Administration/Earth System Research Laboratory-Global Monitoring Division
(ESRL/GMD), Global average marine surface annual mean CO2 data,
ESRL/GMD, Boulder, Colorado, available at:
http://www.esrl.noaa.gov/gmd/index.html, last access: 10 July 2017.
Ehleringer, J. R. and Cerling, T. E.: C3 and C4 Photosynthesis, in:
Encyclopedia of Global Environmental Change, Volume 2, The Earth System:
Biological and Ecological Dimensions of Global Environmental Change, edited
by: Mooney, H. A. and Canadell, J. G., John Wiley & Sons, 186–190, 2002.
Gonzalez-Valencia, R., Magana-Rodriguez, F., Gerardo-Nieto, O.,
Sepulveda-Jauregui, A., Martinez-Cruz, K., Anthony, K. W., Baer, D., and
Thalasso, F.: In Situ Measurement of Dissolved Methane and Carbon Dioxide in
Freshwater Ecosystems by Off-Axis Integrated Cavity Output Spectroscopy,
Environ. Sci. Technol., 48, 11421–11428, https://doi.org/10.1021/Es500987j, 2014.
Halbedel, S. and Koschorreck, M.: Regulation of CO2 emissions from
temperate streams and reservoirs, Biogeosciences, 10, 7539–7551,
https://doi.org/10.5194/Bg-10-7539-2013, 2013.
Hotchkiss, E. R., Hall, R. O., Sponseller, R. A., Butman, D., Klaminder, J.,
Laudon, H., Rosvall, M., and Karlsson, J.: Sources of and processes
controlling CO2 emissions change with the size of streams and rivers,
Nat. Geosci., 8, 696–699, https://doi.org/10.1038/NGEO2507, 2015.
Hrncir, M., Sanda, M., Kulasova, A., and Cislerova, M.: Runoff formation in a
small catchment at hillslope and catchment scales, Hydrol. Process., 24,
2248–2256, 2010.
Humborg, C., Morth, C. M., Sundbom, M., Borg, H., Blenckner, T., Giesler, R.,
and Ittekkot, V.: CO2 supersaturation along the aquatic conduit in
Swedish watersheds as constrained by terrestrial respiration, aquatic
respiration and weathering, Glob. Change Biol., 16, 1966–1978,
https://doi.org/10.1111/J.1365-2486.2009.02092.X, 2010.
Huotari, J., Haapanala, S., Pumpanen, J., Vesala, T., and Ojala, A.:
Efficient gas exchange between a boreal river and the atmosphere, Geophys.
Res. Lett., 40, 5683–5686, https://doi.org/10.1002/2013GL057705, 2013.
Johnson, M. S., Lehmann, J., Riha, S. J., Krusche, A. V., Richey, J. E.,
Ometto, J. P. H. B., and Couto, E. G.: CO2 efflux from Amazonian
headwater streams represents a significant fate for deep soil respiration,
Geophys. Res. Lett., 35, 1–5, https://doi.org/10.1029/2008gl034619, 2008.
Johnson, M. S., Billett, M. F., Dinsmore, K. J., Wallin, M., Dyson, K. E.,
and Jassal, R. S.: Direct and continuous measurement of dissolved carbon
dioxide in freshwater aquatic systems-method and applications, Ecohydrology,
3, 68–78, https://doi.org/10.1002/Eco.95, 2010.
Jones, J. B. and Mulholland, P. J.: Influence of drainage basin topography
and elevation on carbon dioxide and methane supersaturation of stream water,
Biogeochemistry, 40, 57–72, https://doi.org/10.1023/A:1005914121280, 1998.
Lauerwald, R., Laruelle, G. G., Hartmann, J., Ciais, P., and Regnier, P. A.
G.: Spatial patterns in CO2 evasion from the global river network,
Global Biogeochem. Cy., 29, 534–554, https://doi.org/10.1002/2014GB004941, 2015.
Lee, K. Y., van Geldern, R., and Barth, J. A. C.: A high-resolution carbon
balance in a small temperate catchment: Insights from the Schwabach River,
Germany, Appl. Geochem., 85, 86–96, https://doi.org/10.1016/j.apgeochem.2017.08.007,
2017.
Lorke, A., Bodmer, P., Noss, C., Alshboul, Z., Koschorreck, M., Somlai-Haase,
C., Bastviken, D., Flury, S., McGinnis, D. F., Maeck, A., Muller, D., and
Premke, K.: Technical note: drifting versus anchored flux chambers for
measuring greenhouse gas emissions from running waters, Biogeosciences, 12,
7013–7024, https://doi.org/10.5194/bg-12-7013-2015, 2015.
Marx, A., Dusek, J., Jankovec, J., Sanda, M., Vogel, T., van Geldern, R.,
Hartmann, J., and Barth, J. A. C.: A review of CO2 and associated carbon
dynamics in headwater streams: A global perspective, Rev. Geophys., 55,
560–585, https://doi.org/10.1002/2016RG000547, 2017a.
Marx, A., Hintze, S., Sanda, M., Jankovec, J., Oulehle, F., Dusek, J., Vogel,
T., Vitvar, T., van Geldern, R., and Barth, J. A. C.: Acid rain footprint
three decades after peak deposition: Long-term recovery from pollutant
sulphate in the Uhlirska catchment (Czech Republic), Sci. Total. Env., 598,
1037–1049, https://doi.org/10.1016/j.scitotenv.2017.04.109, 2017b.
Marx, A., Conrad, M., Aizinger, V., Prechtel, A., van Geldern, R., and Barth,
J. A. C.: Stream and groundwater chemistry of the Uhlirska catchment, Czech
Republic, PANGAEA, https://doi.org/10.1594/PANGAEA.889689, 2018.
Mook, W. G., Bommerso, J. C., and Staverma, W. H.: Carbon Isotope
Fractionation between Dissolved Bicarbonate and Gaseous Carbon-Dioxide, Earth
Plan. Sc. Lett., 22, 169–176, https://doi.org/10.1016/0012-821x(74)90078-8, 1974.
Mook, W. G., Koopmans, M., Carter, A. F., and Keeling, C. D.: Seasonal,
Latitudinal, and Secular Variations in the Abundance and Isotopic-Ratios of
Atmospheric Carbon-Dioxide.1. Results from Land Stations, J. Geophys.
Res.-Oc. Atm., 88, 915–933, https://doi.org/10.1029/Jc088ic15p10915, 1983.
Moran, M. A. and Zepp, R. G.: Role of photoreactions in the formation of
biologically labile compounds from dissolved organic matter, Limnol.
Oceanogr., 42, 1307–1316, 1997.
Myrttinen, A., Becker, V., and Barth, J. A. C.: A review of methods used for
equilibrium isotope fractionation investigations between dissolved inorganic
carbon and CO2, Earth-Sci. Rev., 115, 192–199,
https://doi.org/10.1016/j.earscirev.2012.08.004, 2012.
Myrttinen, A., Becker, V., and Barth, J. A. C.: Corrigendum to “A review of
methods used for equilibrium isotope fractionation investigations between
dissolved inorganic carbon and CO2” (Earth Sci. Rev., 115, 192–199),
Earth-Sci. Rev., 141, 178–178, https://doi.org/10.1016/j.earscirev.2014.11.009, 2015.
O'Leary, M. H.: Measurement of the isotope fractionation associated with
diffusion of carbon dioxide in aqueous solution, J. Phys. Chem.-US, 88,
823–825, 1984.
Pacific, V. J., McGlynn, B. L., Riveros-Iregui, D. A., Welsch, D. L., and
Epstein, H. E.: Variability in soil respiration across riparian-hillslope
transitions, Biogeochemistry, 91, 51–70, https://doi.org/10.1007/s10533-008-9258-8,
2008.
Plummer, L. N. and Busenberg, E.: The Solubilities of Calcite, Aragonite and
Vaterite in CO2-H2O Solutions between 0 and 90 ∘C, and an
Evaluation of the Aqueous Model for the System CaCO3-CO2-H2O,
Geochim. Cosmochim. Ac., 46, 1011–1040, https://doi.org/10.1016/0016-7037(82)90056-4,
1982.
Polsenaere, P. and Abril, G.: Modelling CO2 degassing from small acidic
rivers using water pCO2, DIC and δ13C-DIC data, Geochim.
Cosmochim. Ac., 91, 220–239, https://doi.org/10.1016/J.Gca.2012.05.030, 2012.
Polsenaere, P., Savoye, N., Etcheber, H., Canton, M., Poirier, D., Bouillon,
S., and Abril, G.: Export and degassing of terrestrial carbon through
watercourses draining a temperate podzolized catchment, Aquat. Sci., 75,
299–319, https://doi.org/10.1007/S00027-012-0275-2, 2013.
Raymond, P. A., Zappa, C. J., Butman, D., Bott, T. L., Potter, J.,
Mulholland, P., Laursen, A. E., McDowell, W. H., and Newbold, D.: Scaling the
gas transfer velocity and hydraulic geometry in streams and small rivers,
Limnol. Oceanogr.-Fluids Environ., 2, 41–53, https://doi.org/10.1215/21573689-1597669,
2012.
Raymond, P. A., Hartmann, J., Lauerwald, R., Sobek, S., McDonald, C., Hoover,
M., Butman, D., Striegl, R., Mayorga, E., Humborg, C., Kortelainen, P., Durr,
H., Meybeck, M., Ciais, P., and Guth, P.: Global carbon dioxide emissions
from inland waters, Nature, 503, 355–359, https://doi.org/10.1038/Nature12760, 2013.
Raymond, P. A., Saiers, J. E., and Sobczak, W. V.: Hydrological and
biogeochemical controls on watershed dissolved organic matter transport:
pulse-shunt concept, Ecology, 97, 5–16, https://doi.org/10.1890/14-1684.1, 2016.
Regnier, P., Friedlingstein, P., Ciais, P., Mackenzie, F. T., Gruber, N.,
Janssens, I. A., Laruelle, G. G., Lauerwald, R., Luyssaert, S., Andersson, A.
J., Arndt, S., Arnosti, C., Borges, A. V., Dale, A. W., Gallego-Sala, A.,
Godderis, Y., Goossens, N., Hartmann, J., Heinze, C., Ilyina, T., Joos, F.,
LaRowe, D. E., Leifeld, J., Meysman, F. J. R., Munhoven, G., Raymond, P. A.,
Spahni, R., Suntharalingam, P., and Thullner, M.: Anthropogenic perturbation
of the carbon fluxes from land to ocean, Nat. Geosci., 6, 597–607,
https://doi.org/10.1038/ngeo1830, 2013.
Reichert, P., Uehlinger, U., and Acuna, V.: Estimating stream metabolism from
oxygen concentrations: Effect of spatial heterogeneity, J. Geophys.
Res.-Biogeo., 114, G03016, https://doi.org/10.1029/2008jg000917, 2009.
Sanda, M. and Cislerova, M.: Transforming Hydrographs in the Hillslope
Subsurface, J. Hydrol. Hydromech., 57, 264–275,
https://doi.org/10.2478/V10098-009-0023-Z, 2009.
Sanda, M., Vitvar, T., Kulasova, A., Jankovec, J., and Cislerova, M.: Run-off
formation in a humid, temperate headwater catchment using a combined
hydrological, hydrochemical and isotopic approach (Jizera Mountains, Czech
Republic), Hydrol. Process., 28, 3217–3229, https://doi.org/10.1002/hyp.9847, 2014.
Sawakuchi, H. O., Neu, V., Ward, N. D., Barros, M. d. L. C., Valerio, A. M.,
Gagne-Maynard, W., Cunha, A. C., Less, D. F. S., Diniz, J. E. M., Brito, D.
C., Krusche, A. V., and Richey, J. E.: Carbon Dioxide Emissions along the
Lower Amazon River, Front. Mar. Sci., 4, 1–12,
https://doi.org/10.3389/fmars.2017.00076, 2017.
Schelker, J., Singer, G. A., Ulseth, A. J., Hengsberger, S., and Battin, T.
J.: CO2 evasion from a steep, high gradient stream network: importance
of seasonal and diurnal variation in aquatic pCO2 and gas transfer,
Limnol. Oceanogr., 61, 1826–1838, https://doi.org/10.1002/lno.10339, 2016.
St-Jean, G.: Automated quantitative and isotopic (13C) analysis of
dissolved inorganic carbon and dissolved organic carbon in continuous-flow
using a total organic carbon analyser, Rapid Commun. Mass Spectrom., 17,
419–428, https://doi.org/10.1002/rcm.926, 2003.
Stets, E. G., Butman, D., McDonald, C. P., Stackpoole, S. M., DeGrandpre, M.
D., and Striegl, R. G.: Carbonate buffering and metabolic controls on carbon
dioxide in rivers, Global Biogeochem. Cy., 31, 663–677,
https://doi.org/10.1002/2016gb005578, 2017.
Teodoru, C. R., Del Giorgio, P. A., Prairie, Y. T., and Camire, M.: Patterns
in pCO2 in boreal streams and rivers of northern Quebec, Canada,
Global Biogeochem. Cy., 23, 1–11, https://doi.org/10.1029/2008gb003404, 2009.
van Geldern, R., Schulte, P., Mader, M., Baier, A., and Barth, J. A. C.:
Spatial and temporal variations of pCO2, dissolved inorganic carbon,
and stable isotopes along a temperate karstic watercourse, Hydrol. Process.,
29, 3423–3440, https://doi.org/10.1002/hyp.10457, 2015.
Venkiteswaran, J. J., Schiff, S. L., and Wallin, M. B.: Large Carbon Dioxide
Fluxes from Headwater Boreal and Sub-Boreal Streams, Plos One, 9, 1–9,
https://doi.org/10.1371/journal.pone.0101756, 2014.
Vitvar, T., Sanda, M., Marx, A., Hubert, E., Jankovec, J., and Barth, J. A.
C.: Hydrochemical and isotopic tracing of runoff generation in the small
mountainous catchment Uhlirska (Czech Republic), using the NETPATH approach,
Acta Hydrologica Slovaca, 17, 190–198, 2016.
Vogel, J. C.: Variability of Carbon Isotope Fractionation during
Photosynthesis, in: Stable Isotopes and Plant Carbon-water Relations, edited
by: Ehleringer, J. R., Hall, A. E., and Farquhar, G. D., Academic Press, San
Diego, 29–46, ISBN 9780122333804, https://doi.org/10.1016/B978-0-08-091801-3.50010-6,
1993,
Wallin, M. B., Oquist, M. G., Buffam, I., Billett, M. F., Nisell, J., and
Bishop, K. H.: Spatiotemporal variability of the gas transfer coefficient
(
Wehrli, B.: Biogeochemistry Conduits of the Carbon Cycle, Nature, 503,
346–347, 2013.
Short summary
CO2 outgassing from small streams causes one of the main uncertainties in global carbon budgets. These are caused by variable flow conditions, changing stream surface areas, and groundwater seeps. Here we used groundwater data to improve a novel stable carbon isotope modelling approach. We found that CO2 outgassing contributed more than three-fourths of annual stream inorganic carbon loss in a small, silicate catchment. We underline the potential of this approach for global applications.
CO2 outgassing from small streams causes one of the main uncertainties in global carbon budgets....
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