Articles | Volume 19, issue 20
https://doi.org/10.5194/bg-19-4993-2022
© 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-19-4993-2022
© 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
Seasonal study of the small-scale variability in dissolved methane in the western Kiel Bight (Baltic Sea) during the European heatwave in 2018
Marine Biogeochemistry, GEOMAR Helmholtz Centre for Ocean Research
Kiel, Kiel, Germany
now at: Department of Environmental Science, University of Stockholm,
Stockholm, Sweden
Hermann W. Bange
Marine Biogeochemistry, GEOMAR Helmholtz Centre for Ocean Research
Kiel, Kiel, Germany
Dennis Booge
Marine Biogeochemistry, GEOMAR Helmholtz Centre for Ocean Research
Kiel, Kiel, Germany
Annette Kock
Marine Biogeochemistry, GEOMAR Helmholtz Centre for Ocean Research
Kiel, Kiel, Germany
now at: Landesamt für Landwirtschaft, Umwelt und ländliche
Räume, Flintbek, Germany
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Joachim Schönfeld, Hermann W. Bange, Helmke Hepach, and Svenja Reents
EGUsphere, https://doi.org/10.5194/egusphere-2025-2672, https://doi.org/10.5194/egusphere-2025-2672, 2025
This preprint is open for discussion and under review for Biogeosciences (BG).
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The current state of intertidal waters at Bottsand lagoon on the Baltic Sea coast, and on the mudflats off Schobüll on the North Sea coast of Schleswig-Holstein, Germany was assessed with a 36-month time series of water level, temperature, and salinity measurements. Periods of strong precipitation, high Elbe river discharge, and high solar radiation caused a higher data variability as compared to the off shore monitoring stations Boknis Eck in the Baltic and Sylt Roads in the North Sea.
Pratirupa Bardhan, Claudia Frey, Gregor Rehder, and Hermann W. Bange
EGUsphere, https://doi.org/10.5194/egusphere-2025-2518, https://doi.org/10.5194/egusphere-2025-2518, 2025
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Nitrous oxide (N2O), a potent greenhouse gas, is released from coastal seas & estuaries, yet we don't fully understand how it is formed and consumed. In this study we collected water from several sites in the central Baltic Sea. N2O came from ammonia in oxic waters. Deep waters with low to no oxygen noted more active N2O cycling. The seafloor was a source in some areas. Typically N2O is produced by bacteria, but our results indicate possibility of other players like fungi or chemical reactions.
Gesa Schulz, Kirstin Dähnke, Tina Sanders, Jan Penopp, Hermann W. Bange, Rena Czeschel, and Birgit Gaye
EGUsphere, https://doi.org/10.5194/egusphere-2025-1660, https://doi.org/10.5194/egusphere-2025-1660, 2025
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Oxygen minimum zones (OMZs) are low-oxygen ocean areas that deplete nitrogen, a key marine nutrient. Understanding nitrogen cycling in OMZs is crucial for the global nitrogen cycle. This study examined nitrogen cycling in the OMZ of the Bay of Bengal and East Equatorial Indian Ocean, revealing limited mixing between both regions. Surface phytoplankton consumes nitrate, while deeper nitrification recycles nitrogen. In the BoB’s OMZ (100–300 m), nitrogen loss likely occurs via anammox.
Johnathan Daniel Maxey, Neil D. Hartstein, Hermann W. Bange, and Moritz Müller
Biogeosciences, 21, 5613–5637, https://doi.org/10.5194/bg-21-5613-2024, https://doi.org/10.5194/bg-21-5613-2024, 2024
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The distribution of N2O in fjord-like estuaries is poorly described in the Southern Hemisphere. Our study describes N2O distribution and its drivers in one such system in Macquarie Harbour, Tasmania. Water samples were collected seasonally in 2022 and 2023. Results show the system removes atmospheric N2O when river flow is high, whereas the system emits N2O when the river flow is low. N2O generated in basins is intercepted by the surface water and exported to the ocean during high river flow.
Riel Carlo O. Ingeniero, Gesa Schulz, and Hermann W. Bange
Biogeosciences, 21, 3425–3440, https://doi.org/10.5194/bg-21-3425-2024, https://doi.org/10.5194/bg-21-3425-2024, 2024
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Our research is the first to measure dissolved NO concentrations in temperate estuarine waters, providing insights into its distribution under varying conditions and enhancing our understanding of its production processes. Dissolved NO was supersaturated in the Elbe Estuary, indicating that it is a source of atmospheric NO. The observed distribution of dissolved NO most likely resulted from nitrification.
Dennis Booge, Jerry F. Tjiputra, Dirk J. L. Olivié, Birgit Quack, and Kirstin Krüger
Earth Syst. Dynam., 15, 801–816, https://doi.org/10.5194/esd-15-801-2024, https://doi.org/10.5194/esd-15-801-2024, 2024
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Oceanic bromoform, produced by algae, is an important precursor of atmospheric bromine, highlighting the importance of implementing these emissions in climate models. The simulated mean oceanic concentrations align well with observations, while the mean atmospheric values are lower than the observed ones. Modelled annual mean emissions mostly occur from the sea to the air and are driven by oceanic concentrations, sea surface temperature, and wind speed, which depend on season and location.
Hanqin Tian, Naiqing Pan, Rona L. Thompson, Josep G. Canadell, Parvadha Suntharalingam, Pierre Regnier, Eric A. Davidson, Michael Prather, Philippe Ciais, Marilena Muntean, Shufen Pan, Wilfried Winiwarter, Sönke Zaehle, Feng Zhou, Robert B. Jackson, Hermann W. Bange, Sarah Berthet, Zihao Bian, Daniele Bianchi, Alexander F. Bouwman, Erik T. Buitenhuis, Geoffrey Dutton, Minpeng Hu, Akihiko Ito, Atul K. Jain, Aurich Jeltsch-Thömmes, Fortunat Joos, Sian Kou-Giesbrecht, Paul B. Krummel, Xin Lan, Angela Landolfi, Ronny Lauerwald, Ya Li, Chaoqun Lu, Taylor Maavara, Manfredi Manizza, Dylan B. Millet, Jens Mühle, Prabir K. Patra, Glen P. Peters, Xiaoyu Qin, Peter Raymond, Laure Resplandy, Judith A. Rosentreter, Hao Shi, Qing Sun, Daniele Tonina, Francesco N. Tubiello, Guido R. van der Werf, Nicolas Vuichard, Junjie Wang, Kelley C. Wells, Luke M. Western, Chris Wilson, Jia Yang, Yuanzhi Yao, Yongfa You, and Qing Zhu
Earth Syst. Sci. Data, 16, 2543–2604, https://doi.org/10.5194/essd-16-2543-2024, https://doi.org/10.5194/essd-16-2543-2024, 2024
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Atmospheric concentrations of nitrous oxide (N2O), a greenhouse gas 273 times more potent than carbon dioxide, have increased by 25 % since the preindustrial period, with the highest observed growth rate in 2020 and 2021. This rapid growth rate has primarily been due to a 40 % increase in anthropogenic emissions since 1980. Observed atmospheric N2O concentrations in recent years have exceeded the worst-case climate scenario, underscoring the importance of reducing anthropogenic N2O emissions.
Gesa Schulz, Tina Sanders, Yoana G. Voynova, Hermann W. Bange, and Kirstin Dähnke
Biogeosciences, 20, 3229–3247, https://doi.org/10.5194/bg-20-3229-2023, https://doi.org/10.5194/bg-20-3229-2023, 2023
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Nitrous oxide (N2O) is an important greenhouse gas. However, N2O emissions from estuaries underlie significant uncertainties due to limited data availability and high spatiotemporal variability. We found the Elbe Estuary (Germany) to be a year-round source of N2O, with the highest emissions in winter along with high nitrogen loads. However, in spring and summer, N2O emissions did not decrease alongside lower nitrogen loads because organic matter fueled in situ N2O production along the estuary.
Guanlin Li, Damian L. Arévalo-Martínez, Riel Carlo O. Ingeniero, and Hermann W. Bange
EGUsphere, https://doi.org/10.5194/egusphere-2023-771, https://doi.org/10.5194/egusphere-2023-771, 2023
Preprint archived
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Dissolved carbon monoxide (CO) surface concentrations were first measured at 14 stations in the Ria Formosa Lagoon system in May 2021. Ria Formosa was a source of atmospheric CO. Microbial consumption accounted for 83 % of the CO production. The results of a 48-hour irradiation experiment with aquaculture effluent water indicated that aquaculture facilities in the Ria Formosa Lagoon seem to be a negligible source of atmospheric CO.
Hanna I. Campen, Damian L. Arévalo-Martínez, and Hermann W. Bange
Biogeosciences, 20, 1371–1379, https://doi.org/10.5194/bg-20-1371-2023, https://doi.org/10.5194/bg-20-1371-2023, 2023
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Carbon monoxide (CO) is a climate-relevant trace gas emitted from the ocean. However, oceanic CO cycling is understudied. Results from incubation experiments conducted in the Fram Strait (Arctic Ocean) indicated that (i) pH did not affect CO cycling and (ii) enhanced CO production and consumption were positively correlated with coloured dissolved organic matter and nitrate concentrations. This suggests microbial CO uptake to be the driving factor for CO cycling in the Arctic Ocean.
Damian L. Arévalo-Martínez, Amir Haroon, Hermann W. Bange, Ercan Erkul, Marion Jegen, Nils Moosdorf, Jens Schneider von Deimling, Christian Berndt, Michael Ernst Böttcher, Jasper Hoffmann, Volker Liebetrau, Ulf Mallast, Gudrun Massmann, Aaron Micallef, Holly A. Michael, Hendrik Paasche, Wolfgang Rabbel, Isaac Santos, Jan Scholten, Katrin Schwalenberg, Beata Szymczycha, Ariel T. Thomas, Joonas J. Virtasalo, Hannelore Waska, and Bradley A. Weymer
Biogeosciences, 20, 647–662, https://doi.org/10.5194/bg-20-647-2023, https://doi.org/10.5194/bg-20-647-2023, 2023
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Groundwater flows at the land–ocean transition and the extent of freshened groundwater below the seafloor are increasingly relevant in marine sciences, both because they are a highly uncertain term of biogeochemical budgets and due to the emerging interest in the latter as a resource. Here, we discuss our perspectives on future research directions to better understand land–ocean connectivity through groundwater and its potential responses to natural and human-induced environmental changes.
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.
Yanan Zhao, Dennis Booge, Christa A. Marandino, Cathleen Schlundt, Astrid Bracher, Elliot L. Atlas, Jonathan Williams, and Hermann W. Bange
Biogeosciences, 19, 701–714, https://doi.org/10.5194/bg-19-701-2022, https://doi.org/10.5194/bg-19-701-2022, 2022
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We present here, for the first time, simultaneously measured dimethylsulfide (DMS) seawater concentrations and DMS atmospheric mole fractions from the Peruvian upwelling region during two cruises in December 2012 and October 2015. Our results indicate low oceanic DMS concentrations and atmospheric DMS molar fractions in surface waters and the atmosphere, respectively. In addition, the Peruvian upwelling region was identified as an insignificant source of DMS emissions during both periods.
Wangwang Ye, Hermann W. Bange, Damian L. Arévalo-Martínez, Hailun He, Yuhong Li, Jianwen Wen, Jiexia Zhang, Jian Liu, Man Wu, and Liyang Zhan
Biogeosciences Discuss., https://doi.org/10.5194/bg-2021-334, https://doi.org/10.5194/bg-2021-334, 2022
Manuscript not accepted for further review
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CH4 is the second important greenhouse gas after CO2. We show that CH4 consumption and sea-ice melting influence the CH4 distribution in the Ross Sea (Southern Ocean), causing undersaturation and net uptake of CH4 during summertime. This study confirms the capability of surface water in the high-latitude Southern Ocean regions to take up atmospheric CH4 which, in turn, will help to improve predictions of how CH4 release/uptake from the ocean will develop when sea-ice retreats in the future.
Yanan Zhao, Cathleen Schlundt, Dennis Booge, and Hermann W. Bange
Biogeosciences, 18, 2161–2179, https://doi.org/10.5194/bg-18-2161-2021, https://doi.org/10.5194/bg-18-2161-2021, 2021
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We present a unique and comprehensive time-series study of biogenic sulfur compounds in the southwestern Baltic Sea, from 2009 to 2018. Dimethyl sulfide is one of the key players regulating global climate change, as well as dimethylsulfoniopropionate and dimethyl sulfoxide. Their decadal trends did not follow increasing temperature but followed some algae group abundances at the Boknis Eck Time Series Station.
Samuel T. Wilson, Alia N. Al-Haj, Annie Bourbonnais, Claudia Frey, Robinson W. Fulweiler, John D. Kessler, Hannah K. Marchant, Jana Milucka, Nicholas E. Ray, Parvadha Suntharalingam, Brett F. Thornton, Robert C. Upstill-Goddard, Thomas S. Weber, Damian L. Arévalo-Martínez, Hermann W. Bange, Heather M. Benway, Daniele Bianchi, Alberto V. Borges, Bonnie X. Chang, Patrick M. Crill, Daniela A. del Valle, Laura Farías, Samantha B. Joye, Annette Kock, Jabrane Labidi, Cara C. Manning, John W. Pohlman, Gregor Rehder, Katy J. Sparrow, Philippe D. Tortell, Tina Treude, David L. Valentine, Bess B. Ward, Simon Yang, and Leonid N. Yurganov
Biogeosciences, 17, 5809–5828, https://doi.org/10.5194/bg-17-5809-2020, https://doi.org/10.5194/bg-17-5809-2020, 2020
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The oceans are a net source of the major greenhouse gases; however there has been little coordination of oceanic methane and nitrous oxide measurements. The scientific community has recently embarked on a series of capacity-building exercises to improve the interoperability of dissolved methane and nitrous oxide measurements. This paper derives from a workshop which discussed the challenges and opportunities for oceanic methane and nitrous oxide research in the near future.
Cited articles
Bakker, D. C. E., Bange, H. W., Gruber, N., Johannessen, T.,
Upstill-Goddard, R. C., Borges, A. V., Delille, B., Löscher, C. R.,
Naqvi, S. W. A., Omar, A. M., and Santana-Casiano, J. M.: Air-sea
interactions of natural long-lived greenhouse gases (CO2, N2O, CH4) in a
changing climate, in: Ocean-Atmosphere Interactions of Gases and Particles,
edited by: Liss, P. S. and Johnson, M. T., Springer, Heidelberg, Germany,
113–169, https://doi.org/10.1007/978-3-642-25643-1, 2014.
Bange, H. W. and Malien, F.: Boknis Eck Time-series Database, Kiel Datamanagement Team [data set], https://www.bokniseck.de//database-access, last access: 21 October 2022.
Bange, H. W., Bergmann, K., Hansen, H. P., Kock, A., Koppe, R., Malien, F., and Ostrau, C.: Dissolved methane during hypoxic events at the Boknis Eck time series station (Eckernförde Bay, SW Baltic Sea), Biogeosciences, 7, 1279–1284, https://doi.org/10.5194/bg-7-1279-2010, 2010.
Bange, H. W., Hansen, H. P., Malien, F., Laß, K., Karstensen, J.,
Petereit, C., Friedrichs, G., and Dale, A.: Boknis Eck Time Series Station (SW Baltic Sea): Measurements from 1957 to 2010, LOICZ-Affiliated Act.,
Inprint, 20, 16–22, 2011.
Becker, M.: Autonomous 13C measurements in the North Atlantic – a novel approach for identifying patterns and driving factors of the upper ocean carbon cycle. Open Access (PhD/ Doctoral thesis), Christian-Albrechts-Universität Kiel, Kiel, Germany, 151 pp., 2016.
Booge, D.: Cruise Report AL510, 1–23,
https://doi.org/10.3289/CR_AL510, 2018a.
Booge, D.: Cruise Report AL516, 1–25,
https://doi.org/10.3289/CR_AL516, 2018b.
Borges, A. V., Royer, C., Martin, J. L., Champenois, W., and Gypens, N.:
Response of marine methane dissolved concentrations and emissions in the
Southern North Sea to the European 2018 heatwave, Cont. Shelf Res., 190,
104004, https://doi.org/10.1016/j.csr.2019.104004, 2019.
Calleja, M. L., Duarte, C. M., Álvarez, M., Vaquer-Sunyer, R.,
Agustí, S., and Herndl, G. J.: Prevalence of strong vertical CO2 and O2
variability in the top meters of the ocean, Global Biogeochem. Cy., 27,
941–949, https://doi.org/10.1002/gbc.20081, 2013.
Capelle, D. W., Dacey, J. W., and Tortell, P. D.: An automated, high
through-put method for accurate and precise measurements of dissolved
nitrous-oxide and methane concentrations in natural waters, Limnol.
Oceanogr. Method., 13, 345–355, https://doi.org/10.1002/lom3.10029, 2015.
Chiriaco, M., Bastin, S., Yiou, P., Haeffelin, M., Dupont, J. C., and
Stéfanon, M.: European heatwave in July 2006: Observations and modeling
showing how local processes amplify conducive large-scale conditions,
Geophys. Res. Lett., 41, 5644–5652, https://doi.org/10.1002/2014GL060205,
2014.
Dale, A. W., Sommer, S., Bohlen, L., Treude, T., Bertics, V. J., Bange, H.
W., Pfannkuche, O., Schorp, T., Mattsdotter, M., and Wallmann, K.: Rates and
regulation of nitrogen cycling in seasonally hypoxic sediments during winter
(Boknis Eck, SW Baltic Sea): Sensitivity to environmental variables, Estuar.
Coast. Shelf Sci., 95, 14–28, https://doi.org/10.1016/j.ecss.2011.05.016,
2011.
David, H. A.: Further Applications of Range to the Analysis of Variance,
Oxford Univ. Press behalf Biometrika Trust, 38, 393–409, https://doi.org/10.2307/2332585, 1951.
Dlugokencky, E.: Monthly Averages of CH4 at Mace Head, County Galway, Ireland (MHD), NOAA Earth Syst. Res. Lab. Glob. Monit. Lab., ftp://aftp.cmdl.noaa.gov/data/trace_gases/ch4/flask/surface/ch4_mhd_surface-flask_1_ccgg_month.txt, last access: 6 July 2020.
Donis, D., Janssen, F., Liu, B., Wenzhöfer, F., Dellwig, O., Escher, P.,
Spitzy, A., and Böttcher, M. E.: Biogeochemical impact of submarine
ground water discharge on coastal surface sands of the southern Baltic Sea,
Estuar. Coast. Shelf Sci., 189, 131–142,
https://doi.org/10.1016/j.ecss.2017.03.003, 2017.
Duan, Z., Møller, N., Greenberg, J., and Weare, J. H.: The prediction of
methane solubility in natural waters to high ionic strength from 0 to
250 ∘C and from 0 to 1600 bar, Geochim. Cosmochim. Ac., 56,
1451–1460, https://doi.org/10.1016/0016-7037(92)90215-5, 1992.
Fischer, T., Kock, A., Arévalo-Martínez, D. L., Dengler, M., Brandt, P., and Bange, H. W.: Gas exchange estimates in the Peruvian upwelling regime biased by multi-day near-surface stratification, Biogeosciences, 16, 2307–2328, https://doi.org/10.5194/bg-16-2307-2019, 2019.
Gindorf, S.: Development of a Purge + Trap System for the Quantification
of Methane Variability in the Baltic Sea, Open Access (Master thesis), Christian-Albrechts-Universität zu Kiel, Kiel, Germany, 81 pp., 2020.
Gindorf, S., Booge, D., Kock, A., Bange, H. W., and Marandino, C. A.: Surface and water column methane (CH4) distribution and sea-to-air flux during ALKOR cruise AL510, PANGAEA [data set], https://doi.org/10.1594/PANGAEA.923992, 2020a.
Gindorf, S., Booge, D., Kock, A., Bange, H. W., and Marandino, C. A.: Surface and water column methane (CH4) distribution and sea-to-air flux during ALKOR cruise AL516, PANGAEA [data set], https://doi.org/10.1594/PANGAEA.924372, 2020b.
Gülzow, W., Rehder, G., Schneider v. Deimling, J., Seifert, T., and Tóth, Z.: One year of continuous measurements constraining methane emissions from the Baltic Sea to the atmosphere using a ship of opportunity, Biogeosciences, 10, 81–99, https://doi.org/10.5194/bg-10-81-2013, 2013.
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.
Ho, D. T., Marandino, C. A., Friedrichs, G., Engel, A., Bange, H.,
Barthelmess, T., Fischer, T., Koffman, T., Lange, F., Quack, B., Paulsen,
M., Schlosser, P., and Zhou, L.: Baltic Sea Gas Exchange Experiment (Baltic GasEx). Open Access [Poster], in: SOLAS Open Science Conference 2019, 21–25 April 2019, Sapporo, Japan, 2019.
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.
Karlson, B., Andersson, L. S., Kaitala, S., Kronsell, J., Mohlin, M.,
Seppälä, J., and Willstrand Wranne, A.: A comparison of FerryBox
data vs. monitoring data from research vessels for near surface waters of
the Baltic Sea and the Kattegat, J. Mar. Syst., 162, 98–111,
https://doi.org/10.1016/j.jmarsys.2016.05.002, 2016.
Kitidis, V., Upstill-Goddard, R. C., and Anderson, L. G.: Methane and
nitrous oxide in surface water along the North-West Passage, Arctic Ocean,
Mar. Chem., 121, 80–86, https://doi.org/10.1016/j.marchem.2010.03.006,
2010.
Kock, A. and Bange, H. W.: Counting the ocean's greenhouse gas emissions, Eos, 96, 10–13, https://doi.org/10.1029/2015EO023665, 2015 (data will be available at: https://memento.geomar.de, last access: 25 October 2022).
Kueh, M. T. and Lin, C. Y.: The 2018 summer heatwaves over northwestern
Europe and its extended-range prediction, Sci. Rep., 10, 1–18,
https://doi.org/10.1038/s41598-020-76181-4, 2020.
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.
Li, Y., Fichot, C. G., Geng, L., Scarratt, M. G., and Xie, H.: The
Contribution of Methane Photoproduction to the Oceanic Methane Paradox,
Geophys. Res. Lett., 47, 1–10, https://doi.org/10.1029/2020GL088362, 2020.
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.
Ma, X., Lennartz, S. T., and Bange, H. W.: A multi-year observation of nitrous oxide at the Boknis Eck Time Series Station in the Eckernförde Bay (southwestern Baltic Sea), Biogeosciences, 16, 4097–4111, https://doi.org/10.5194/bg-16-4097-2019, 2019.
Ma, X., Sun, M., Lennartz, S. T., and Bange, H. W.: A decade of methane measurements at the Boknis Eck Time Series Station in Eckernförde Bay (southwestern Baltic Sea), Biogeosciences, 17, 3427–3438, https://doi.org/10.5194/bg-17-3427-2020, 2020.
Maltby, J., Steinle, L., Löscher, C. R., Bange, H. W., Fischer, M. A., Schmidt, M., and Treude, T.: Microbial methanogenesis in the sulfate-reducing zone of sediments in the Eckernförde Bay, SW Baltic Sea, Biogeosciences, 15, 137–157, https://doi.org/10.5194/bg-15-137-2018, 2018.
Pawlowicz, R.: M_Map: A mapping package for MATLAB, version 1.4m, [Computer software], https://www.eoas.ubc.ca/~rich/map.html (last access: 22 September 2021), 2020.
Reeburgh, W. S.: Oceanic methane biogeochemistry, Chem. Rev., 107, 486–513,
https://doi.org/10.1021/cr050362v, 2007.
Reindl, A. R. and Bolałek, J.: Methane flux from sediment into near-bottom
water and its variability along the Hel Peninsula-Southern Baltic Sea, Cont.
Shelf Res., 74, 88–93, https://doi.org/10.1016/j.csr.2013.12.006, 2014.
Rhee, T. S., Kettle, A. J., and Andreae, M. O.: Methane and nitrous oxide
emissions from the ocean: A reassessment using basin-wide observations in
the Atlantic, J. Geophys. Res.-Atmos., 114, D12304,
https://doi.org/10.1029/2008JD011662, 2009.
Roth, F., Sun, X., Geibel, M. C., Prytherch, J., Brüchert, V., Bonaglia,
S., Broman, E., Nascimento, F., Norkko, A., and Humborg, C.: High
spatiotemporal variability of methane concentrations challenges estimates of
emissions across vegetated coastal ecosystems, Glob. Change Biol., 28,
4308–4322, https://doi.org/10.1111/gcb.16177, 2022.
Steinle, L., Maltby, J., Treude, T., Kock, A., Bange, H. W., Engbersen, N., Zopfi, J., Lehmann, M. F., and Niemann, H.: Effects of low oxygen concentrations on aerobic methane oxidation in seasonally hypoxic coastal waters, Biogeosciences, 14, 1631–1645, https://doi.org/10.5194/bg-14-1631-2017, 2017.
Treude, T., Krüger, M., Boetius, A., and Jørgensen, B. B.:
Environmental control on anaerobic oxidation of methane in the gassy
sediments of Eckernförde Bay (German Baltic), Limnol. Oceanogr., 50,
1771–1786, https://doi.org/10.4319/lo.2005.50.6.1771, 2005.
Weber, T., Wiseman, N. A., and Kock, A.: Global ocean methane emissions
dominated by shallow coastal waters, Nat. Commun., 10, 1–10,
https://doi.org/10.1038/s41467-019-12541-7, 2019.
Wiesenburg, D. A. and Guinasso, N. L.: Equilibrium Solubilities of Methane,
Carbon Monoxide, and Hydrogen in Water and Sea Water, J. Chem. Eng. Data,
24, 356–360, https://doi.org/10.1021/je60083a006, 1979.
Wilson, S. T., Bange, H. W., Arévalo-Martínez, D. L., Barnes, J., Borges, A. V., Brown, I., Bullister, J. L., Burgos, M., Capelle, D. W., Casso, M., de la Paz, M., Farías, L., Fenwick, L., Ferrón, S., Garcia, G., Glockzin, M., Karl, D. M., Kock, A., Laperriere, S., Law, C. S., Manning, C. C., Marriner, A., Myllykangas, J.-P., Pohlman, J. W., Rees, A. P., Santoro, A. E., Tortell, P. D., Upstill-Goddard, R. C., Wisegarver, D. P., Zhang, G.-L., and Rehder, G.: An intercomparison of oceanic methane and nitrous oxide measurements, Biogeosciences, 15, 5891–5907, https://doi.org/10.5194/bg-15-5891-2018, 2018.
Wilson, S. T., Al-Haj, A. N., Bourbonnais, A., Frey, C., Fulweiler, R. W., Kessler, J. D., Marchant, H. K., Milucka, J., Ray, N. E., Suntharalingam, P., Thornton, B. F., Upstill-Goddard, R. C., Weber, T. S., Arévalo-Martínez, D. L., Bange, H. W., Benway, H. M., Bianchi, D., Borges, A. V., Chang, B. X., Crill, P. M., del Valle, D. A., Farías, L., Joye, S. B., Kock, A., Labidi, J., Manning, C. C., Pohlman, J. W., Rehder, G., Sparrow, K. J., Tortell, P. D., Treude, T., Valentine, D. L., Ward, B. B., Yang, S., and Yurganov, L. N.: Ideas and perspectives: A strategic assessment of methane and nitrous oxide measurements in the marine environment, Biogeosciences, 17, 5809–5828, https://doi.org/10.5194/bg-17-5809-2020, 2020.
Zhang, Y., Zhao, H., Zhai, W., Zang, K., and Wang, J.:
Enhanced methane emissions from oil and gas exploration areas to the
atmosphere – The central Bohai Sea, Mar. Pollut. Bull., 81, 157–165,
https://doi.org/10.1016/j.marpolbul.2014.02.002, 2014.
Short summary
Methane is a climate-relevant greenhouse gas which is emitted to the atmosphere from coastal areas such as the Baltic Sea. We measured the methane concentration in the water column of the western Kiel Bight. Methane concentrations were higher in September than in June. We found no relationship between the 2018 European heatwave and methane concentrations. Our results show that the methane distribution in the water column is strongly affected by temporal and spatial variabilities.
Methane is a climate-relevant greenhouse gas which is emitted to the atmosphere from coastal...
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