Articles | Volume 17, issue 18
https://doi.org/10.5194/bg-17-4571-2020
© Author(s) 2020. 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-17-4571-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
18 Sep 2020
Research article |
| 18 Sep 2020
| 18 Sep 2020
Mineralization of organic matter in boreal lake sediments: rates, pathways, and nature of the fermenting substrates
INRS-ETE, Université du Québec, 490 rue de la Couronne,
Québec (QC), Canada G1K 9A9
Geotop, Interuniversity research and training centre in geosciences, 201 Président-Kennedy Ave., Montréal (QC), Canada H2X 3Y7
Norwegian Institute for Water Research (NIVA),
Gaustadalléen 21, 0349 Oslo, Norway
Yves Gélinas
Geotop, Interuniversity research and training centre in geosciences, 201 Président-Kennedy Ave., Montréal (QC), Canada H2X 3Y7
Department of Chemistry and Biochemistry, Concordia University, 7141 Sherbrooke Street West, Montreal (QC), Canada H4B 1R6
André Tessier
INRS-ETE, Université du Québec, 490 rue de la Couronne,
Québec (QC), Canada G1K 9A9
Charles Gobeil
INRS-ETE, Université du Québec, 490 rue de la Couronne,
Québec (QC), Canada G1K 9A9
Geotop, Interuniversity research and training centre in geosciences, 201 Président-Kennedy Ave., Montréal (QC), Canada H2X 3Y7
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Wael Al Hamwi, Maren Dubbert, Jörg Schaller, Matthias Lück, Marten Schmidt, and Mathias Hoffmann
Biogeosciences, 21, 5639–5651, https://doi.org/10.5194/bg-21-5639-2024, https://doi.org/10.5194/bg-21-5639-2024, 2024
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We present a fully automatic, low-cost soil–plant enclosure system to monitor CO2 and evapotranspiration fluxes within greenhouse experiments. It operates in two modes: independent, using low-cost sensors, and dependent, where multiple chambers connect to a single gas analyzer via a low-cost multiplexer. This system provides precise, accurate measurements and high temporal resolution, enabling comprehensive monitoring of plant–soil responses to various treatments and conditions.
Zhao-Jun Yong, Wei-Jen Lin, Chiao-Wen Lin, and Hsing-Juh Lin
Biogeosciences, 21, 5247–5260, https://doi.org/10.5194/bg-21-5247-2024, https://doi.org/10.5194/bg-21-5247-2024, 2024
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We measured CO2 and CH4 fluxes from mangrove stems and soils of Avicennia marina and Kandelia obovata during tidal cycles. Both stem types served as CO2 and CH4 sources, emitting less CH4 than soils, with no difference in CO2 flux. While A. marina stems showed increased CO2 fluxes from low to high tides, they acted as a CH4 sink before flooding and as a source after ebbing. However, K. obovata stems showed no flux pattern. This study highlights the need to consider tidal influence and species.
Ihab Alfadhel, Ignacio Peralta-Maraver, Isabel Reche, Enrique P. Sánchez-Cañete, Sergio Aranda-Barranco, Eva Rodríguez-Velasco, Andrew S. Kowalski, and Penélope Serrano-Ortiz
Biogeosciences, 21, 5117–5129, https://doi.org/10.5194/bg-21-5117-2024, https://doi.org/10.5194/bg-21-5117-2024, 2024
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Inland saline lakes are crucial in the global carbon cycle, but increased droughts may alter their carbon exchange capacity. We measured CO2 and CH4 fluxes in a Mediterranean saline lake using the eddy covariance method under dry and wet conditions. We found the lake acts as a carbon sink during wet periods but not during droughts. These results highlight the importance of saline lakes in carbon sequestration and their vulnerability to climate-change-induced droughts.
Nathaniel B. Weston, Cynthia Troy, Patrick J. Kearns, Jennifer L. Bowen, William Porubsky, Christelle Hyacinthe, Christof Meile, Philippe Van Cappellen, and Samantha B. Joye
Biogeosciences, 21, 4837–4851, https://doi.org/10.5194/bg-21-4837-2024, https://doi.org/10.5194/bg-21-4837-2024, 2024
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Nitrous oxide (N2O) is a potent greenhouse and ozone-depleting gas produced largely from microbial nitrogen cycling processes, and human activities have resulted in increases in atmospheric N2O. We investigate the role of physical and chemical disturbances to soils and sediments in N2O production. We demonstrate that physicochemical perturbation increases N2O production, microbial community adapts over time, and initial perturbation appears to confer resilience to subsequent disturbance.
Sigrid Trier Kjær, Sebastian Westermann, Nora Nedkvitne, and Peter Dörsch
Biogeosciences, 21, 4723–4737, https://doi.org/10.5194/bg-21-4723-2024, https://doi.org/10.5194/bg-21-4723-2024, 2024
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Permafrost peatlands are thawing due to climate change, releasing large quantities of carbon that degrades upon thawing and is released as CO2, CH4 or dissolved organic carbon (DOC). We incubated thawed Norwegian permafrost peat plateaus and thermokarst pond sediment found next to permafrost for up to 350 d to measure carbon loss. CO2 production was initially the highest, whereas CH4 production increased over time. The largest carbon loss was measured at the top of the peat plateau core as DOC.
Silvie Lainela, Erik Jacobs, Stella-Theresa Luik, Gregor Rehder, and Urmas Lips
Biogeosciences, 21, 4495–4519, https://doi.org/10.5194/bg-21-4495-2024, https://doi.org/10.5194/bg-21-4495-2024, 2024
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We evaluate the variability of carbon dioxide and methane in the surface layer of the north-eastern basins of the Baltic Sea in 2018. We show that the shallower coastal areas have considerably higher spatial variability and seasonal amplitude of surface layer pCO2 and cCH4 than measured in the offshore areas of the Baltic Sea. Despite this high variability, caused mostly by coastal physical processes, the average annual air–sea CO2 fluxes differed only marginally between the sub-basins.
Maren Jenrich, Juliane Wolter, Susanne Liebner, Christian Knoblauch, Guido Grosse, Fiona Giebeler, Dustin Whalen, and Jens Strauss
EGUsphere, https://doi.org/10.5194/egusphere-2024-2891, https://doi.org/10.5194/egusphere-2024-2891, 2024
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Climate warming in the Arctic is causing the erosion of permafrost coasts and the transformation of permafrost lakes into lagoons. To understand how this affects greenhouse gas (GHG) emissions, we studied carbon dioxide (CO₂) and methane (CH₄) production in lagoons with varying sea connections. Younger lagoons produce more CH₄, while CO₂ increases in more marine conditions. Flooding of permafrost lowlands due to rising sea levels may lead to higher GHG emissions from Arctic coasts in the future.
Martti Honkanen, Mika Aurela, Juha Hatakka, Lumi Haraguchi, Sami Kielosto, Timo Mäkelä, Jukka Seppälä, Simo-Matti Siiriä, Ken Stenbäck, Juha-Pekka Tuovinen, Pasi Ylöstalo, and Lauri Laakso
Biogeosciences, 21, 4341–4359, https://doi.org/10.5194/bg-21-4341-2024, https://doi.org/10.5194/bg-21-4341-2024, 2024
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The exchange of CO2 between the sea and the atmosphere was studied in the Archipelago Sea, Baltic Sea, in 2017–2021, using an eddy covariance technique. The sea acted as a net source of CO2 with an average yearly emission of 27.1 gC m-2 yr-1, indicating that the marine ecosystem respired carbon that originated elsewhere. The yearly CO2 emission varied between 18.2–39.2 gC m-2 yr-1, mostly due to the yearly variation of ecosystem carbon uptake.
Tea Thum, Tuuli Miinalainen, Outi Seppälä, Holly Croft, Cheryl Rogers, Ralf Staebler, Silvia Caldararu, and Sönke Zaehle
EGUsphere, https://doi.org/10.5194/egusphere-2024-2802, https://doi.org/10.5194/egusphere-2024-2802, 2024
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Climate change has potential to influence the carbon sequestration potential of terrestrial ecosystems and here also nitrogen cycle is important. We used a terrestrial biosphere model QUINCY at mixed deciduous forest in Canada. We investigated the usefulness of using leaf area index and leaf chlorophyll content to improve the parameterization of the model. This work paves way for using spaceborn observations in the model parameterization, also including information on the nitrogen cycle.
Ralf C. H. Aben, Daniël van de Craats, Jim Boonman, Stijn H. Peeters, Bart Vriend, Coline C. F. Boonman, Ype van der Velde, Gilles Erkens, and Merit van den Berg
Biogeosciences, 21, 4099–4118, https://doi.org/10.5194/bg-21-4099-2024, https://doi.org/10.5194/bg-21-4099-2024, 2024
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Drained peatlands cause high CO2 emissions. We assessed the effectiveness of subsurface water infiltration systems (WISs) in reducing CO2 emissions related to increases in water table depth (WTD) on 12 sites for up to 4 years. Results show WISs markedly reduced emissions by 2.1 t CO2-C ha-1 yr-1. The relationship between the amount of carbon above the WTD and CO2 emission was stronger than the relationship between WTD and emission. Long-term monitoring is crucial for accurate emission estimates.
Stavros Stagakis, Dominik Brunner, Junwei Li, Leif Backman, Anni Karvonen, Lionel Constantin, Leena Järvi, Minttu Havu, Jia Chen, Sophie Emberger, and Liisa Kulmala
EGUsphere, https://doi.org/10.5194/egusphere-2024-2475, https://doi.org/10.5194/egusphere-2024-2475, 2024
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The balance between CO2 uptake and emissions from urban green areas is still not well understood. This study evaluated for the first time the urban park CO2 exchange simulations by four different types of biosphere models by comparing them with observations. Even though some advantages and disadvantages of the different model types were identified, there was no strong evidence that more complex models performed better than simple ones.
Ingeborg Bussmann, Eric P. Achterberg, Holger Brix, Nicolas Brüggemann, Götz Flöser, Claudia Schütze, and Philipp Fischer
Biogeosciences, 21, 3819–3838, https://doi.org/10.5194/bg-21-3819-2024, https://doi.org/10.5194/bg-21-3819-2024, 2024
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Methane (CH4) is an important greenhouse gas and contributes to climate warming. However, the input of CH4 from coastal areas to the atmosphere is not well defined. Dissolved and atmospheric CH4 was determined at high spatial resolution in or above the North Sea. The atmospheric CH4 concentration was mainly influenced by wind direction. With our detailed study on the spatial distribution of CH4 fluxes we were able to provide a detailed and more realistic estimation of coastal CH4 fluxes.
Patrick Aurich, Uwe Spank, and Matthias Koschorreck
EGUsphere, https://doi.org/10.5194/egusphere-2024-2550, https://doi.org/10.5194/egusphere-2024-2550, 2024
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Lakes can be sources and sinks for the greenhouse gas carbon dioxide. The gas exchange between the atmosphere and the water can be measured by taking gas samples in both. However, the depth of water samples is not well defined, which may cause errors. We hypothesized that gradients of CO2 concentrations develop under the surface when wind speeds are very low. Our measurements show that such a gradient can occur in calm nights, potentially shifting a lake from a CO2 sink to a source.
Niu Zhu, Jinniu Wang, Dongliang Luo, Xufeng Wang, Cheng Shen, and Ning Wu
Biogeosciences, 21, 3509–3522, https://doi.org/10.5194/bg-21-3509-2024, https://doi.org/10.5194/bg-21-3509-2024, 2024
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Our study delves into the vital role of subalpine forests in the Qinghai–Tibet Plateau as carbon sinks in the context of climate change. Utilizing advanced eddy covariance systems, we uncover their significant carbon sequestration potential, observing distinct seasonal patterns influenced by temperature, humidity, and radiation. Notably, these forests exhibit robust carbon absorption, with potential implications for global carbon balance.
Colette L. Kelly, Nicole M. Travis, Pascale Anabelle Baya, Claudia Frey, Xin Sun, Bess B. Ward, and Karen L. Casciotti
Biogeosciences, 21, 3215–3238, https://doi.org/10.5194/bg-21-3215-2024, https://doi.org/10.5194/bg-21-3215-2024, 2024
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Nitrous oxide, a potent greenhouse gas, accumulates in regions of the ocean that are low in dissolved oxygen. We used a novel combination of chemical tracers to determine how nitrous oxide is produced in one of these regions, the eastern tropical North Pacific Ocean. Our experiments showed that the two most important sources of nitrous oxide under low-oxygen conditions are denitrification, an anaerobic process, and a novel “hybrid” process performed by ammonia-oxidizing archaea.
Hella van Asperen, Thorsten Warneke, Alessandro Carioca de Araújo, Bruce Forsberg, Sávio José Filgueiras Ferreira, Thomas Röckmann, Carina van der Veen, Sipko Bulthuis, Leonardo Ramos de Oliveira, Thiago de Lima Xavier, Jailson da Mata, Marta de Oliveira Sá, Paulo Ricardo Teixeira, Julie Andrews de França e Silva, Susan Trumbore, and Justus Notholt
Biogeosciences, 21, 3183–3199, https://doi.org/10.5194/bg-21-3183-2024, https://doi.org/10.5194/bg-21-3183-2024, 2024
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Carbon monoxide (CO) is regarded as an important indirect greenhouse gas. Soils can emit and take up CO, but, until now, uncertainty remains as to which process dominates in tropical rainforests. We present the first soil CO flux measurements from a tropical rainforest. Based on our observations, we report that tropical rainforest soils are a net source of CO. In addition, we show that valley streams and inundated areas are likely additional hot spots of CO in the ecosystem.
Chaolei Yang, Yufeng Tian, Jingqi Cui, Guangxiong He, Jingyuan Li, Canfeng Li, Haichuang Duan, Zong Wei, Liu Yan, Xin Xia, Yong Huang, and Aihua Jiang
EGUsphere, https://doi.org/10.5194/egusphere-2024-1226, https://doi.org/10.5194/egusphere-2024-1226, 2024
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The environmental factors and CO2 flux of the grassland ecosystem in the dry-hot valley of the Jinsha River exhibited highly seasonal characteristics. During the rainy season, the grassland showed a carbon sink feature, while during the dry season, it exhibited carbon emission status. Throughout the entire year, the grassland ecosystem acted as a weak carbon source, exhibiting a carbon-neutral. The CO2 flux was most influenced by vapor pressure deficit, relative humidity, and soil water content.
Yélognissè Agbohessou, Claire Delon, Manuela Grippa, Eric Mougin, Daouda Ngom, Espoir Koudjo Gaglo, Ousmane Ndiaye, Paulo Salgado, and Olivier Roupsard
Biogeosciences, 21, 2811–2837, https://doi.org/10.5194/bg-21-2811-2024, https://doi.org/10.5194/bg-21-2811-2024, 2024
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Emissions of greenhouse gases in the Sahel are not well represented because they are considered weak compared to the rest of the world. However, natural areas in the Sahel emit carbon dioxide and nitrous oxides, which need to be assessed because of extended surfaces. We propose an assessment of such emissions in Sahelian silvopastoral systems and of how they are influenced by environmental characteristics. These results are essential to inform climate change strategies in the region.
Merit van den Berg, Thomas M. Gremmen, Renske J. E. Vroom, Jacobus van Huissteden, Jim Boonman, Corine J. A. van Huissteden, Ype van der Velde, Alfons J. P. Smolders, and Bas P. van de Riet
Biogeosciences, 21, 2669–2690, https://doi.org/10.5194/bg-21-2669-2024, https://doi.org/10.5194/bg-21-2669-2024, 2024
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Drained peatlands emit 3 % of the global greenhouse gas emissions. Paludiculture is a way to reduce CO2 emissions while at the same time generating an income for landowners. The side effect is the potentially high methane emissions. We found very high methane emissions for broadleaf cattail compared with narrowleaf cattail and water fern. The rewetting was, however, effective to stop CO2 emissions for all species. The highest potential to reduce greenhouse gas emissions had narrowleaf cattail.
Antonio Donateo, Daniela Famulari, Donato Giovannelli, Arturo Mariani, Mauro Mazzola, Stefano Decesari, and Gianluca Pappaccogli
EGUsphere, https://doi.org/10.5194/egusphere-2024-1440, https://doi.org/10.5194/egusphere-2024-1440, 2024
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This study focuses on direct measurements of CO2 and CH4 turbulent eddy covariance fluxes in tundra ecosystems in the Svalbard Islands over a two-year period. Our results reveal dynamic interactions between climatic conditions and ecosystem activities such as photosynthesis and microbial activity. The observed net summertime methane uptake is correlated with the activation and aeration of soil microorganisms. High temperature anomalies increase CO2 and CH4 emissions.
Thea H. Heimdal, Galen A. McKinley, Adrienne J. Sutton, Amanda R. Fay, and Lucas Gloege
Biogeosciences, 21, 2159–2176, https://doi.org/10.5194/bg-21-2159-2024, https://doi.org/10.5194/bg-21-2159-2024, 2024
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Measurements of ocean carbon are limited in time and space. Machine learning algorithms are therefore used to reconstruct ocean carbon where observations do not exist. Improving these reconstructions is important in order to accurately estimate how much carbon the ocean absorbs from the atmosphere. In this study, we find that a small addition of observations from the Southern Ocean, obtained by autonomous sampling platforms, could significantly improve the reconstructions.
Guilherme L. Torres Mendonça, Julia Pongratz, and Christian H. Reick
Biogeosciences, 21, 1923–1960, https://doi.org/10.5194/bg-21-1923-2024, https://doi.org/10.5194/bg-21-1923-2024, 2024
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We study the timescale dependence of airborne fraction and underlying feedbacks by a theory of the climate–carbon system. Using simulations we show the predictive power of this theory and find that (1) this fraction generally decreases for increasing timescales and (2) at all timescales the total feedback is negative and the model spread in a single feedback causes the spread in the airborne fraction. Our study indicates that those are properties of the system, independently of the scenario.
François Clayer, Jan Erik Thrane, Kuria Ndungu, Andrew King, Peter Dörsch, and Thomas Rohrlack
Biogeosciences, 21, 1903–1921, https://doi.org/10.5194/bg-21-1903-2024, https://doi.org/10.5194/bg-21-1903-2024, 2024
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Determination of dissolved greenhouse gas (GHG) in freshwater allows us to estimate GHG fluxes. Mercuric chloride (HgCl2) is used to preserve water samples prior to GHG analysis despite its environmental and health impacts and interferences with water chemistry in freshwater. Here, we tested the effects of HgCl2, two substitutes and storage time on GHG in water from two boreal lakes. Preservation with HgCl2 caused overestimation of CO2 concentration with consequences for GHG flux estimation.
Helena Rautakoski, Mika Korkiakoski, Jarmo Mäkelä, Markku Koskinen, Kari Minkkinen, Mika Aurela, Paavo Ojanen, and Annalea Lohila
Biogeosciences, 21, 1867–1886, https://doi.org/10.5194/bg-21-1867-2024, https://doi.org/10.5194/bg-21-1867-2024, 2024
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Current and future nitrous oxide (N2O) emissions are difficult to estimate due to their high variability in space and time. Several years of N2O fluxes from drained boreal peatland forest indicate high importance of summer precipitation, winter temperature, and snow conditions in controlling annual N2O emissions. The results indicate increasing year-to-year variation in N2O emissions in changing climate with more extreme seasonal weather conditions.
Matthias Koschorreck, Norbert Kamjunke, Uta Koedel, Michael Rode, Claudia Schuetze, and Ingeborg Bussmann
Biogeosciences, 21, 1613–1628, https://doi.org/10.5194/bg-21-1613-2024, https://doi.org/10.5194/bg-21-1613-2024, 2024
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We measured the emission of carbon dioxide (CO2) and methane (CH4) from different sites at the river Elbe in Germany over 3 days to find out what is more important for quantification: small-scale spatial variability or diurnal temporal variability. We found that CO2 emissions were very different between day and night, while CH4 emissions were more different between sites. Dried out river sediments contributed to CO2 emissions, while the side areas of the river were important CH4 sources.
Odysseas Sifounakis, Edwin Haas, Klaus Butterbach-Bahl, and Maria P. Papadopoulou
Biogeosciences, 21, 1563–1581, https://doi.org/10.5194/bg-21-1563-2024, https://doi.org/10.5194/bg-21-1563-2024, 2024
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We performed a full assessment of the carbon and nitrogen cycles of a cropland ecosystem. An uncertainty analysis and quantification of all carbon and nitrogen fluxes were deployed. The inventory simulations include greenhouse gas emissions of N2O, NH3 volatilization and NO3 leaching from arable land cultivation in Greece. The inventory also reports changes in soil organic carbon and nitrogen stocks in arable soils.
Sarah M. Ludwig, Luke Schiferl, Jacqueline Hung, Susan M. Natali, and Roisin Commane
Biogeosciences, 21, 1301–1321, https://doi.org/10.5194/bg-21-1301-2024, https://doi.org/10.5194/bg-21-1301-2024, 2024
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Landscapes are often assumed to be homogeneous when using eddy covariance fluxes, which can lead to biases when calculating carbon budgets. In this study we report eddy covariance carbon fluxes from heterogeneous tundra. We used the footprints of each flux observation to unmix the fluxes coming from components of the landscape. We identified and quantified hot spots of carbon emissions in the landscape. Accurately scaling with landscape heterogeneity yielded half as much regional carbon uptake.
Justine Trémeau, Beñat Olascoaga, Leif Backman, Esko Karvinen, Henriikka Vekuri, and Liisa Kulmala
Biogeosciences, 21, 949–972, https://doi.org/10.5194/bg-21-949-2024, https://doi.org/10.5194/bg-21-949-2024, 2024
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We studied urban lawns and meadows in the Helsinki metropolitan area, Finland. We found that meadows are more resistant to drought events but that they do not increase carbon sequestration compared with lawns. Moreover, the transformation from lawns to meadows did not demonstrate any negative climate effects in terms of greenhouse gas emissions. Even though social and economic aspects also steer urban development, these results can guide planning to consider carbon-smart options.
Guantao Chen, Edzo Veldkamp, Muhammad Damris, Bambang Irawan, Aiyen Tjoa, and Marife D. Corre
Biogeosciences, 21, 513–529, https://doi.org/10.5194/bg-21-513-2024, https://doi.org/10.5194/bg-21-513-2024, 2024
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We established an oil palm management experiment in a large-scale oil palm plantation in Jambi, Indonesia. We recorded oil palm fruit yield and measured soil CO2, N2O, and CH4 fluxes. After 4 years of treatment, compared with conventional fertilization with herbicide weeding, reduced fertilization with mechanical weeding did not reduce yield and soil greenhouse gas emissions, which highlights the legacy effects of over a decade of conventional management prior to the start of the experiment.
Elizabeth Gachibu Wangari, Ricky Mwangada Mwanake, Tobias Houska, David Kraus, Gretchen Maria Gettel, Ralf Kiese, Lutz Breuer, and Klaus Butterbach-Bahl
Biogeosciences, 20, 5029–5067, https://doi.org/10.5194/bg-20-5029-2023, https://doi.org/10.5194/bg-20-5029-2023, 2023
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Agricultural landscapes act as sinks or sources of the greenhouse gases (GHGs) CO2, CH4, or N2O. Various physicochemical and biological processes control the fluxes of these GHGs between ecosystems and the atmosphere. Therefore, fluxes depend on environmental conditions such as soil moisture, soil temperature, or soil parameters, which result in large spatial and temporal variations of GHG fluxes. Here, we describe an example of how this variation may be studied and analyzed.
Laurie C. Menviel, Paul Spence, Andrew E. Kiss, Matthew A. Chamberlain, Hakase Hayashida, Matthew H. England, and Darryn Waugh
Biogeosciences, 20, 4413–4431, https://doi.org/10.5194/bg-20-4413-2023, https://doi.org/10.5194/bg-20-4413-2023, 2023
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As the ocean absorbs 25% of the anthropogenic emissions of carbon, it is important to understand the impact of climate change on the flux of carbon between the ocean and the atmosphere. Here, we use a very high-resolution ocean, sea-ice, carbon cycle model to show that the capability of the Southern Ocean to uptake CO2 has decreased over the last 40 years due to a strengthening and poleward shift of the southern hemispheric westerlies. This trend is expected to continue over the coming century.
Petr Znachor, Jiří Nedoma, Vojtech Kolar, and Anna Matoušů
Biogeosciences, 20, 4273–4288, https://doi.org/10.5194/bg-20-4273-2023, https://doi.org/10.5194/bg-20-4273-2023, 2023
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We conducted intensive spatial sampling of the hypertrophic fishpond to better understand the spatial dynamics of methane fluxes and environmental heterogeneity in fishponds. The diffusive fluxes of methane accounted for only a minor fraction of the total fluxes and both varied pronouncedly within the pond and over the studied summer season. This could be explained only by the water depth. Wind substantially affected temperature, oxygen and chlorophyll a distribution in the pond.
Sofie Sjögersten, Martha Ledger, Matthias Siewert, Betsabé de la Barreda-Bautista, Andrew Sowter, David Gee, Giles Foody, and Doreen S. Boyd
Biogeosciences, 20, 4221–4239, https://doi.org/10.5194/bg-20-4221-2023, https://doi.org/10.5194/bg-20-4221-2023, 2023
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Permafrost thaw in Arctic regions is increasing methane emissions, but quantification is difficult given the large and remote areas impacted. We show that UAV data together with satellite data can be used to extrapolate emissions across the wider landscape as well as detect areas at risk of higher emissions. A transition of currently degrading areas to fen type vegetation can increase emission by several orders of magnitude, highlighting the importance of quantifying areas at risk.
Cole G. Brachmann, Tage Vowles, Riikka Rinnan, Mats P. Björkman, Anna Ekberg, and Robert G. Björk
Biogeosciences, 20, 4069–4086, https://doi.org/10.5194/bg-20-4069-2023, https://doi.org/10.5194/bg-20-4069-2023, 2023
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Herbivores change plant communities through grazing, altering the amount of CO2 and plant-specific chemicals (termed VOCs) emitted. We tested this effect by excluding herbivores and studying the CO2 and VOC emissions. Herbivores reduced CO2 emissions from a meadow community and altered VOC composition; however, community type had the strongest effect on the amount of CO2 and VOCs released. Herbivores can mediate greenhouse gas emissions, but the effect is marginal and community dependent.
Ole Lessmann, Jorge Encinas Fernández, Karla Martínez-Cruz, and Frank Peeters
Biogeosciences, 20, 4057–4068, https://doi.org/10.5194/bg-20-4057-2023, https://doi.org/10.5194/bg-20-4057-2023, 2023
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Based on a large dataset of seasonally resolved methane (CH4) pore water concentrations in a reservoir's sediment, we assess the significance of CH4 emissions due to reservoir flushing. In the studied reservoir, CH4 emissions caused by one flushing operation can represent 7 %–14 % of the annual CH4 emissions and depend on the timing of the flushing operation. In reservoirs with high sediment loadings, regular flushing may substantially contribute to the overall CH4 emissions.
Matti Räsänen, Risto Vesala, Petri Rönnholm, Laura Arppe, Petra Manninen, Markus Jylhä, Jouko Rikkinen, Petri Pellikka, and Janne Rinne
Biogeosciences, 20, 4029–4042, https://doi.org/10.5194/bg-20-4029-2023, https://doi.org/10.5194/bg-20-4029-2023, 2023
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Fungus-growing termites recycle large parts of dead plant material in African savannas and are significant sources of greenhouse gases. We measured CO2 and CH4 fluxes from their mounds and surrounding soils in open and closed habitats. The fluxes scale with mound volume. The results show that emissions from mounds of fungus-growing termites are more stable than those from other termites. The soil fluxes around the mound are affected by the termite colonies at up to 2 m distance from the mound.
Tim René de Groot, Anne Margriet Mol, Katherine Mesdag, Pierre Ramond, Rachel Ndhlovu, Julia Catherine Engelmann, Thomas Röckmann, and Helge Niemann
Biogeosciences, 20, 3857–3872, https://doi.org/10.5194/bg-20-3857-2023, https://doi.org/10.5194/bg-20-3857-2023, 2023
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This study investigates methane dynamics in the Wadden Sea. Our measurements revealed distinct variations triggered by seasonality and tidal forcing. The methane budget was higher in warmer seasons but surprisingly high in colder seasons. Methane dynamics were amplified during low tides, flushing the majority of methane into the North Sea or releasing it to the atmosphere. Methanotrophic activity was also elevated during low tide but mitigated only a small fraction of the methane efflux.
Cited articles
Alperin, M. J., Albert, D. B., and Martens, C. S.: Seasonal variations in
production and consumption rates of dissolved organic carbon in an
organic-rich coastal sediment, Geochim. Cosmochim. Ac., 58,
4909–4930, https://doi.org/10.1016/0016-7037(94)90221-6, 1994.
Arndt, S., Jørgensen, B. B., LaRowe, D. E., Middelburg, J. J., Pancost,
R. D., and Regnier, P.: Quantifying the degradation of organic matter in
marine sediments: A review and synthesis, Earth-Sci. Rev., 123,
53–86, https://doi.org/10.1016/j.earscirev.2013.02.008, 2013.
Arning, E. T., van Berk, W., and Schulz, H.-M.: Fate and behaviour of marine
organic matter during burial of anoxic sediments: Testing CH2O as
generalized input parameter in reaction transport models, Mar. Chem.,
178, 8–21, https://doi.org/10.1016/j.marchem.2015.12.002, 2016.
Bastviken, D., Cole, J., Pace, M., and Tranvik, L.: Methane emissions from
lakes: Dependence of lake characteristics, two regional assessments, and a
global estimate: LAKE METHANE EMISSIONS, Global Biogeochem. Cy.,
18, GB4009, https://doi.org/10.1029/2004GB002238, 2004.
Bastviken, D., Cole, J. J., Pace, M. L., and Van de Bogert, M. C.: Fates of
methane from different lake habitats: Connecting whole-lake budgets and CH4 emissions: FATES OF LAKE METHANE, J. Geophys. Res.-Biogeo., 113, G02024, https://doi.org/10.1029/2007JG000608, 2008.
Beal, E. J., House, C. H., and Orphan, V. J.: Manganese- and iron-dependent
marine methane oxidation, Science, 325, 184–187,
https://doi.org/10.1126/science.1169984, 2009.
Berg, P., Risgaard-Petersen, N., and Rysgaard, S.: Interpretation of measured
concentration profiles in sediment pore water, Limnol. Oceanogr.,
43, 1500–1510, https://doi.org/10.4319/lo.1998.43.7.1500, 1998.
Borowski, W. S., Paull, C. K., and Ussler, W.: Carbon cycling within the
upper methanogenic zone of continental rise sediments; An example from the
methane-rich sediments overlying the Blake Ridge gas hydrate deposits,
Mar. Chem., 57, 299–311, https://doi.org/10.1016/S0304-4203(97)00019-4, 1997.
Botrel, M., Gregory-Eaves, I., and Maranger, R.: Defining drivers of nitrogen
stable isotopes (δ15N) of surface sediments in temperate lakes, J.
Paleolimnol., 52, 419–433, https://doi.org/10.1007/s10933-014-9802-6, 2014.
Boudreau, B. P.: On the equivalence of nonlocal and radial-diffusion models
for porewater irrigation, J. Mar. Res., 42, 731–735,
https://doi.org/10.1357/002224084788505924, 1984.
Boudreau, B. P.: Diagenetic models and their implementation: modelling
transport and reactions in aquatic sediments, Springer, Berlin, Germany, 1997.
Boudreau, B. P. and Marinelli, R. L.: A modelling study of discontinuous biological irrigation, J. Mar. Res., 52, 947–968, https://doi.org/10.1357/0022240943076902, 1994.
Buffle, J.: Complexation reactions in aquatic systems: An analytical
approach, Ellis Horwood Limited, Cambridge, UK, 1988.
Burdige, D. J.: Microbial processes affecting alanine and glutamic acid in anoxic marine sediments, FEMS Microbiol. Ecol., 85, 211–232, 1991.
Burdige, D. J.: Preservation of Organic Matter in Marine Sediments:
Controls, Mechanisms, and an Imbalance in Sediment Organic Carbon Budgets?,
Chem. Rev., 107, 467–485, https://doi.org/10.1021/cr050347q, 2007.
Burdige, D. J. and Komada, T.: Anaerobic oxidation of methane and the
stoichiometry of remineralization processes in continental margin sediments,
Limnol. Oceanogr., 56, 1781–1796,
https://doi.org/10.4319/lo.2011.56.5.1781, 2011.
Burdige, D. J., Komada, T., Magen, C., and Chanton, J. P.: Methane dynamics in
Santa Barbara Basin (USA) sediments as examined with a reaction-transport
model, J. Mar. Res., 74, 277–313, 2017.
Carignan, R. and Lean, D. R. S.: Regeneration of dissolved substances in a
seasonally anoxic lake: The relative importance of processes occurring in
the water column and in the sediments, Limnol. Oceanogr., 36,
683–707, https://doi.org/10.4319/lo.1991.36.4.0683, 1991.
Carignan, R., Rapin, F., and Tessier, A.: Sediment porewater sampling for
metal analysis: A comparison of techniques, Geochim. Cosmochim. Ac.,
49, 2493–2497, https://doi.org/10.1016/0016-7037(85)90248-0, 1985.
Chanton, J. P., Martens, C. S., and Kelley, C. A.: Gas transport from
methane-saturated, tidal freshwater and wetland sediments, Limnol. Oceanogr., 34, 807–819, https://doi.org/10.4319/lo.1989.34.5.0807, 1989.
Chanton, J. P., Whiting, G. J., Blair, N. E., Lindau, C. W., and Bollich, P.
K.: Methane emission from rice: Stable isotopes, diurnal variations, and CO2
exchange, Global Biogeochem. Cy., 11, 15–27,
https://doi.org/10.1029/96GB03761, 1997.
Chasar, L. S., Chanton, J. P., Glaser, P. H., Siegel, D. I., and Rivers, J.
S.: Radiocarbon and stable carbon isotopic evidence for transport and
transformation of dissolved organic carbon, dissolved inorganic carbon, and
CH4 in a northern Minnesota peatland, Global Biogeochem. Cy., 14,
1095–1108, https://doi.org/10.1029/1999GB001221, 2000.
Clayer, F., Gobeil, C., and Tessier, A.: Rates and pathways of sedimentary
organic matter mineralization in two basins of a boreal lake: Emphasis on
methanogenesis and methanotrophy: Methane cycling in boreal lake sediments,
Limnol. Oceanogr., 61, S131–S149, https://doi.org/10.1002/lno.10323, 2016.
Clayer, F., Moritz, A., Gélinas, Y., Tessier, A., and Gobeil, C.:
Modeling the carbon isotope signatures of methane and dissolved inorganic
carbon to unravel mineralization pathways in boreal lake sediments,
Geochim. Cosmochim. Ac., 229, 36–52, https://doi.org/10.1016/j.gca.2018.02.012,
2018.
Clayer, F., Tessier, A., Gobeil, C., and Gélinas, Y.: Dataset for “Mineralization of organic matter in boreal lake sediments: Rates, pathways and nature of the fermenting substrates”, HydroShare, https://doi.org/10.4211/hs.38e069761d7b4cf4abe3cbcaaac06016, 2020.
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, 172–185,
https://doi.org/10.1007/s10021-006-9013-8, 2007.
Conrad, R.: Contribution of hydrogen to methane production and control of
hydrogen concentrations in methanogenic soils and sediments, FEMS
Microbiol. Ecol., 28, 193–202,
https://doi.org/10.1111/j.1574-6941.1999.tb00575.x, 1999.
Conrad, R.: Quantification of methanogenic pathways using stable carbon
isotopic signatures: a review and a proposal, Org. Geochem., 36,
739–752, https://doi.org/10.1016/j.orggeochem.2004.09.006, 2005.
Conrad, R., Claus, P., and Casper, P.: Characterization of stable isotope
fractionation during methane production in the sediment of a eutrophic lake,
Lake Dagow, Germany, Limnol. Oceanogr., 54, 457–471,
https://doi.org/10.4319/lo.2009.54.2.0457, 2009.
Corbett, J. E., Tfaily, M. M., Burdige, D. J., Cooper, W. T., Glaser, P. H., and Chanton, J. P.: Partitioning pathways of CO2 production in peatlands
with stable carbon isotopes, Biogeochemistry, 114, 327–340, 2013.
Corbett, J. E., Tfaily, M. M., Burdige, D. J., Glaser, P. H., and Chanton, J.
P.: The relative importance of methanogenesis in the decomposition of
organic matter in northern peatlands, J. Geophys. Res.-Biogeo., 120, 280–293, https://doi.org/10.1002/2014JG002797, 2015.
Couture, R.-M., Gobeil, C., and Tessier, A.: Chronology of Atmospheric
Deposition of Arsenic Inferred from Reconstructed Sedimentary Records,
Environ. Sci. Technol., 42, 6508–6513, https://doi.org/10.1021/es800818j, 2008.
Couture, R.-M., Gobeil, C., and Tessier, A.: Arsenic, iron and sulfur
co-diagenesis in lake sediments, Geochim. Cosmochim. Ac., 74,
1238–1255, https://doi.org/10.1016/j.gca.2009.11.028, 2010.
Couture, R.-M., Fischer, R., Van Cappellen, P., and Gobeil, C.: Non-steady
state diagenesis of organic and inorganic sulfur in lake sediments,
Geochim. Cosmochim. Ac., 194, 15–33, https://doi.org/10.1016/j.gca.2016.08.029,
2016.
Cranwell, P. A.: Diagenesis of free and bound lipids in terrestrial detritus
deposited in a lacustrine sediment, Org. Geochem., 3, 79–89,
https://doi.org/10.1016/0146-6380(81)90002-4, 1981.
D'Arcy, P.: Relations entre les propriétés du bassin versant, la
morphométrie du lac et la qualité des eaux, INRS-ETE, Université
du Québec, Québec City, Québec, Canada, 1993.
DelSontro, T., Boutet, L., St-Pierre, A., del Giorgio, P. A., and Prairie, Y.
T.: Methane ebullition and diffusion from northern ponds and lakes regulated
by the interaction between temperature and system productivity: Productivity
regulates methane lake flux, Limnol. Oceanogr., 61, S62–S77,
https://doi.org/10.1002/lno.10335, 2016.
Egger, M., Rasigraf, O., Sapart, C. J., Jilbert, T., Jetten, M. S. M.,
Röckmann, T., van der Veen, C., Bândă, N., Kartal, B., Ettwig,
K. F., and Slomp, C. P.: Iron-Mediated Anaerobic Oxidation of Methane in
Brackish Coastal Sediments, Environ. Sci. Technol., 49, 277–283,
https://doi.org/10.1021/es503663z, 2015.
Ettwig, K. F., Butler, M. K., Le Paslier, D., Pelletier, E., Mangenot, S.,
Kuypers, M. M. M., Schreiber, F., Dutilh, B. E., Zedelius, J., de Beer, D.,
Gloerich, J., Wessels, H. J. C. T., van Alen, T., Luesken, F., Wu, M. L.,
van de Pas-Schoonen, K. T., Op den Camp, H. J. M., Janssen-Megens, E. M.,
Francoijs, K.-J., Stunnenberg, H., Weissenbach, J., Jetten, M. S. M., and
Strous, M.: Nitrite-driven anaerobic methane oxidation by oxygenic bacteria,
Nature, 464, 543–548, https://doi.org/10.1038/nature08883, 2010.
Fakhraee, M., Li, J., and Katsev, S.: Significant role of organic sulfur in
supporting sedimentary sulfate reduction in low-sulfate environments,
Geochim. Cosmochim. Ac., 213, 502–516,
https://doi.org/10.1016/j.gca.2017.07.021, 2017.
Feyte, S., Gobeil, C., Tessier, A., and Cossa, D.: Mercury dynamics in lake
sediments, Geochim. Cosmochim. Ac., 82, 92–112,
https://doi.org/10.1016/j.gca.2011.02.007, 2012.
Forster, S. and Graf, G.: Impact of irrigation on oxygen flux into the sediment: Intermittent pumping by Callianassa subterranea and “piston-pumping” by Lanice conchilega,
Mar. Biol., 123, 335–346, https://doi.org/10.1007/BF00353625, 1995.
Francioso, O., Montecchio, D., Gioacchini, P., and Ciavatta, C.: Thermal
analysis (TG–DTA) and isotopic characterization (13C–15N) of humic acids
from different origins, Appl. Geochem., 20, 537–544,
https://doi.org/10.1016/j.apgeochem.2004.10.003, 2005.
Galand, P. E., Yrjälä, K., and Conrad, R.: Stable carbon isotope fractionation during methanogenesis in three boreal peatland ecosystems, Biogeosciences, 7, 3893–3900, https://doi.org/10.5194/bg-7-3893-2010, 2010.
Gallon, C., Hare, L., and Tessier, A.: Surviving in anoxic surroundings: How burrowing aquatic insects create an oxic microhabitat, J. N. Am. Benthol. Soc., 27, 570–580, https://doi.org/10.1899/07-132.1, 2008.
Hare, L.: Sediment Colonization by Littoral and Profundal Insects, J. N. Am. Benthol. Soc., 14, 315–323, https://doi.org/10.2307/1467783,
1995.
Hare, L., Carignan, R., and Huerta-Diaz, M. A.: A field study of metal
toxicity and accumulation by benthic invertebrates; implications for the
acid-volatile sulfide (AVS) model, Limnol. Oceanogr., 39,
1653–1668, https://doi.org/10.4319/lo.1994.39.7.1653, 1994.
Hastie, A., Lauerwald, R., Weyhenmeyer, G., Sobek, S., Verpoorter, C., and
Regnier, P.: CO2 evasion from boreal lakes: Revised estimate, drivers
of spatial variability, and future projections, Glob. Change Biol.,
24, 711–728, https://doi.org/10.1111/gcb.13902, 2018.
Hedges, J. I. and Oades, J. M.: Comparative organic geochemistries of soils
and marine sediments, Org. Geochem., 27, 319–361,
https://doi.org/10.1016/S0146-6380(97)00056-9, 1997.
Hesslein, R. H.: An in situ sampler for close interval pore water studies1,
Limnol. Oceanogr., 21, 912–914, https://doi.org/10.4319/lo.1976.21.6.0912,
1976.
Holgerson, M. A. and Raymond, P. A.: Large contribution to inland water CO2
and CH4 emissions from very small ponds, Nat. Geosci., 9, 222–226,
https://doi.org/10.1038/ngeo2654, 2016.
Hornibrook, E. R. C., Longstaffe, F. J., and Fyfe, W. S.: Spatial
distribution of microbial methane production pathways in temperate zone
wetland soils: Stable carbon and hydrogen isotope evidence, Geochim. Cosmochim. Ac., 61, 745–753, https://doi.org/10.1016/S0016-7037(96)00368-7, 1997.
Hornibrook, E. R. C., Longstaffe, F. J., and Fyfe, W. S.: Evolution of stable
carbon isotope compositions for methane and carbon dioxide in freshwater
wetlands and other anaerobic environments, Geochim. Cosmochim. Ac.,
64, 1013–1027, https://doi.org/10.1016/S0016-7037(99)00321-X, 2000.
Jørgensen, B. B. and Parkes, R. J.: Role of sulfate reduction and methane
production by organic carbon degradation in eutrophic fjord sediments
(Limfjorden, Denmark), Limnol. Oceanogr., 55, 1338–1352,
https://doi.org/10.4319/lo.2010.55.3.1338, 2010.
Joshani, A.: Investigating organic matter preservation through complexation
with iron oxides in Lake Tantaré, masters, Concordia University, 1
September, available at:
https://spectrum.library.concordia.ca/980434/ (last access: 12 December 2019),
2015.
Kankaala, P., Huotari, J., Tulonen, T., and Ojala, A.: Lake-size dependent
physical forcing drives carbon dioxide and methane effluxes from lakes in a
boreal landscape, Limnol. Oceanogr., 58, 1915–1930,
https://doi.org/10.4319/lo.2013.58.6.1915, 2013.
Laforte, L., Tessier, A., Gobeil, C., and Carignan, R.: Thallium diagenesis
in lacustrine sediments, Geochim. Cosmochim. Ac., 69,
5295–5306, https://doi.org/10.1016/j.gca.2005.06.006, 2005.
LaRowe, D. E. and Van Cappellen, P.: Degradation of natural organic matter:
A thermodynamic analysis, Geochim. Cosmochim. Ac., 75,
2030–2042, https://doi.org/10.1016/j.gca.2011.01.020, 2011.
Lazzaretti, M. A., Hanselmann, K. W., Brandl, H., Span, D., and Bachofen, R.:
The role of sediments in the phosphorus cycle in Lake Lugano. II. Seasonal
and spatial variability of microbiological processes at the sediment-water
interface, Aquat. Sci., 54, 285–299, https://doi.org/10.1007/BF00878142, 1992.
Lazzaretti-Ulmer, M. A. and Hanselmann, K. W.: Seasonal variation of the
microbially regulated buffering capacity at sediment-water interfaces in a
freshwater lake, Aquat. Sci., 61, 59–74, https://doi.org/10.1007/s000270050052,
1999.
Matisoff, G. and Wang, X.: Solute transport in sediments by freshwater
infaunal bioirrigators, Limnol. Oceanogr., 43, 1487–1499,
https://doi.org/10.4319/lo.1998.43.7.1487, 1998.
Matsumoto, G. I.: Biogeochemical study of organic substances in Antarctic
lakes, Hydrobiologia, 172, 265–299, https://doi.org/10.1007/BF00031627, 1989.
Meile, C. D., Berg, P., Cappellen, P. S. J., and Tuncay, K.: Solute-specific
pore water irrigation: Implications for chemical cycling in early
diagenesis, J. Mar. Res., 63, 601–621, https://doi.org/10.1357/0022240054307885,
2005.
Natchimuthu, S., Wallin, M. B., Klemedtsson, L., and Bastviken, D.:
Spatio-temporal patterns of stream methane and carbon dioxide emissions in a
hemiboreal catchment in Southwest Sweden, Sci. Rep., 7, 39729,
https://doi.org/10.1038/srep39729, 2017.
Niessen, F., Wick, L., Bonani, G., Chondrogianni, C., and Siegenthaler, C.:
Aquatic system response to climatic and human changes: Productivity, bottom
water oxygen status, and sapropel formation in Lake Lugano over the last 10 000 years, Aquat. Sci., 54, 257–276, https://doi.org/10.1007/BF00878140, 1992.
Norði, K. À, Thamdrup, B., and Schubert, C. J.: Anaerobic oxidation
of methane in an iron-rich Danish freshwater lake sediment, Limnol. Oceanogr., 58, 546–554, https://doi.org/10.4319/lo.2013.58.2.0546, 2013.
Paraska, D. W., Hipsey, M. R., and Salmon, S. U.: Sediment diagenesis models:
Review of approaches, challenges and opportunities, Environ. Model. Softw., 61, 297–325, https://doi.org/10.1016/j.envsoft.2014.05.011, 2014.
Pohlman, J. W., Ruppel, C., Hutchinson, D. R., Downer, R., and Coffin, R. B.:
Assessing sulfate reduction and methane cycling in a high salinity pore
water system in the northern Gulf of Mexico, Mar. Petrol. Geol.,
25, 942–951, https://doi.org/10.1016/j.marpetgeo.2008.01.016, 2008.
Pohlman, J. W., Riedel, M., Bauer, J. E., Canuel, E. A., Paull, C. K.,
Lapham, L., Grabowski, K. S., Coffin, R. B., and Spence, G. D.: Anaerobic
methane oxidation in low-organic content methane seep sediments, Geochim. Cosmochim. Ac., 108, 184–201, https://doi.org/10.1016/j.gca.2013.01.022, 2013.
Poindexter, C. M., Baldocchi, D. D., Matthes, J. H., Knox, S. H., and
Variano, E. A.: The contribution of an overlooked transport process to a
wetland's methane emissions, Geophys. Res. Lett., 43,
6276–6284, https://doi.org/10.1002/2016GL068782, 2016.
Raghoebarsing, A. A., Pol, A., van de Pas-Schoonen, K. T., Smolders, A. J.
P., Ettwig, K. F., Rijpstra, W. I. C., Schouten, S., Damsté, J. S. S.,
Op den Camp, H. J. M., Jetten, M. S. M., and Strous, M.: A microbial
consortium couples anaerobic methane oxidation to denitrification, Nature,
440, 918–921, https://doi.org/10.1038/nature04617, 2006.
Riisgård, H. U. and Larsen, P. S.: Water pumping and analysis of flow in burrowing zoobenthos: An overview, Aquat. Ecol., 39, 237–258, https://doi.org/10.1007/s10452-004-1916-x, 2005.
Sabrekov, A. F., Runkle, B. R. K., Glagolev, M. V., Terentieva, I. E., Stepanenko, V. M., Kotsyurbenko, O. R., Maksyutov, S. S., and Pokrovsky, O. S.: Variability in methane emissions from West Siberia's shallow boreal lakes on a regional scale and its environmental controls, Biogeosciences, 14, 3715–3742, https://doi.org/10.5194/bg-14-3715-2017, 2017.
Sauer, P. E., Miller, G. H., and Overpeck, J. T.: Oxygen isotope ratios of
organic matter in arctic lakes as a paleoclimate proxy: field and laboratory
investigations, J. Paleolimnol., 25, 43–64,
https://doi.org/10.1023/A:1008133523139, 2001.
Schindler, D. W., Curtis, P. J., Parker, B. R., and Stainton, M. P.:
Consequences of climate warming and lake acidification for UV-B penetration
in North American boreal lakes, Nature, 379, 705–708,
https://doi.org/10.1038/379705a0, 1996.
Sivan, O., Schrag, D. P., and Murray, R. W.: Rates of methanogenesis and
methanotrophy in deep-sea sediments, Geobiology, 5, 141–151,
https://doi.org/10.1111/j.1472-4669.2007.00098.x, 2007.
Staehr, P. A., Testa, J. M., Kemp, W. M., Cole, J. J., Sand-Jensen, K., and
Smith, S. V.: The metabolism of aquatic ecosystems: history, applications,
and future challenges, Aquat. Sci., 74, 15–29,
https://doi.org/10.1007/s00027-011-0199-2, 2012.
Thottathil, S. D., Reis, P. C. J., and Prairie, Y. T.: Methane oxidation
kinetics in northern freshwater lakes, Biogeochemistry, 143, 105–116,
https://doi.org/10.1007/s10533-019-00552-x, 2019.
Tipping, E.: Cation binding by humic substances, Cambridge University
Press, Cambridge, UK, 2002.
Turner, A. J., Jacob, D. J., Wecht, K. J., Maasakkers, J. D., Lundgren, E., Andrews, A. E., Biraud, S. C., Boesch, H., Bowman, K. W., Deutscher, N. M., Dubey, M. K., Griffith, D. W. T., Hase, F., Kuze, A., Notholt, J., Ohyama, H., Parker, R., Payne, V. H., Sussmann, R., Sweeney, C., Velazco, V. A., Warneke, T., Wennberg, P. O., and Wunch, D.: Estimating global and North American methane emissions with high spatial resolution using GOSAT satellite data, Atmos. Chem. Phys., 15, 7049–7069, https://doi.org/10.5194/acp-15-7049-2015, 2015.
Ullman, W. J. and Aller, R. C.: Diffusion coefficients in nearshore marine
sediments1, Limnol. Oceanogr., 27, 552–556,
https://doi.org/10.4319/lo.1982.27.3.0552, 1982.
Verpoorter, C., Kutser, T., Seekell, D. A., and Tranvik, L. J.: A global
inventory of lakes based on high-resolution satellite imagery, Geophys. Res. Lett., 41, 6396–6402, https://doi.org/10.1002/2014GL060641, 2014.
Wallin, M. B., Campeau, A., Audet, J., Bastviken, D., Bishop, K., Kokic, J.,
Laudon, H., Lundin, E., Löfgren, S., Natchimuthu, S., Sobek, S.,
Teutschbein, C., Weyhenmeyer, G. A., and Grabs, T.: Carbon dioxide and
methane emissions of Swedish low-order streams – a national estimate and
lessons learnt from more than a decade of observations, Limnol. Oceanogr. Lett., 3, 156–167, https://doi.org/10.1002/lol2.10061, 2018.
Wand, U., Samarkin, V. A., Nitzsche, H.-M., and Hubberten, H.-W.:
Biogeochemistry of methane in the permanently ice-covered Lake Untersee,
central Dronning Maud Land, East Antarctica, Limnol. Oceanogr.,
51, 1180–1194, https://doi.org/10.4319/lo.2006.51.2.1180, 2006.
Wang, Y. and Van Cappellen, P.: A multicomponent reactive transport model of
early diagenesis: Application to redox cycling in coastal marine sediments,
Geochim. Cosmochim. Ac., 60, 2993–3014,
https://doi.org/10.1016/0016-7037(96)00140-8, 1996.
Whiticar, M. J.: Carbon and hydrogen isotope systematics of bacterial
formation and oxidation of methane, Chem. Geol., 161, 291–314,
https://doi.org/10.1016/S0009-2541(99)00092-3, 1999.
Whiticar, M. J., Faber, E., and Schoell, M.: Biogenic methane formation in
marine and freshwater environments: CO2 reduction vs. acetate
fermentation—Isotope evidence, Geochim. Cosmochim. Ac., 50,
693–709, https://doi.org/10.1016/0016-7037(86)90346-7, 1986.
Wuebbles, D. J. and Hayhoe, K.: Atmospheric methane and global change,
Earth-Sci. Rev., 57, 177–210, https://doi.org/10.1016/S0012-8252(01)00062-9,
2002.
Short summary
Here, we quantified the sediment production of methane and carbon dioxide in lake sediments to better characterize the nature of the organic matter at the origin of these two greenhouse gases. We demonstrate that the production of these gases is not adequately represented in models for deep lake sediments. We thus propose to improve the representation of organic matter degradation reactions in current models for improving predictions of greenhouse gas cycling in aquatic sediments.
Here, we quantified the sediment production of methane and carbon dioxide in lake sediments to...
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