Research article 29 Nov 2021
Research article | 29 Nov 2021
Methane in Zackenberg Valley, NE Greenland: multidecadal growing season fluxes of a high-Arctic tundra
Johan H. Scheller et al.
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Junqi Wei, Xiaoyan Li, Lei Liu, Torben Røjle Christensen, Zhiyun Jiang, Yujun Ma, Xiuchen Wu, Hongyun Yao, and Efrén López-Blanco
Biogeosciences, 19, 861–875, https://doi.org/10.5194/bg-19-861-2022, https://doi.org/10.5194/bg-19-861-2022, 2022
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Although water availability has been linked to the response of ecosystem carbon (C) sink–source to climate warming, the mechanisms by which C uptake responds to soil moisture remain unclear. We explored how soil water and other environmental drivers modulate net C uptake in an alpine swamp meadow. Results reveal that nearly saturated soil conditions during warm seasons can help to maintain lower ecosystem respiration and therefore enhance the C sequestration capacity in this alpine swamp meadow.
Anna-Maria Virkkala, Susan M. Natali, Brendan M. Rogers, Jennifer D. Watts, Kathleen Savage, Sara June Connon, Marguerite Mauritz, Edward A. G. Schuur, Darcy Peter, Christina Minions, Julia Nojeim, Roisin Commane, Craig A. Emmerton, Mathias Goeckede, Manuel Helbig, David Holl, Hiroki Iwata, Hideki Kobayashi, Pasi Kolari, Efrén López-Blanco, Maija E. Marushchak, Mikhail Mastepanov, Lutz Merbold, Frans-Jan W. Parmentier, Matthias Peichl, Torsten Sachs, Oliver Sonnentag, Masahito Ueyama, Carolina Voigt, Mika Aurela, Julia Boike, Gerardo Celis, Namyi Chae, Torben R. Christensen, M. Syndonia Bret-Harte, Sigrid Dengel, Han Dolman, Colin W. Edgar, Bo Elberling, Eugenie Euskirchen, Achim Grelle, Juha Hatakka, Elyn Humphreys, Järvi Järveoja, Ayumi Kotani, Lars Kutzbach, Tuomas Laurila, Annalea Lohila, Ivan Mammarella, Yojiro Matsuura, Gesa Meyer, Mats B. Nilsson, Steven F. Oberbauer, Sang-Jong Park, Roman Petrov, Anatoly S. Prokushkin, Christopher Schulze, Vincent L. St. Louis, Eeva-Stiina Tuittila, Juha-Pekka Tuovinen, William Quinton, Andrej Varlagin, Donatella Zona, and Viacheslav I. Zyryanov
Earth Syst. Sci. Data, 14, 179–208, https://doi.org/10.5194/essd-14-179-2022, https://doi.org/10.5194/essd-14-179-2022, 2022
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The effects of climate warming on carbon cycling across the Arctic–boreal zone (ABZ) remain poorly understood due to the relatively limited distribution of ABZ flux sites. Fortunately, this flux network is constantly increasing, but new measurements are published in various platforms, making it challenging to understand the ABZ carbon cycle as a whole. Here, we compiled a new database of Arctic–boreal CO2 fluxes to help facilitate large-scale assessments of the ABZ carbon cycle.
Andreas Alexander, Jaroslav Obu, Thomas V. Schuler, Andreas Kääb, and Hanne H. Christiansen
The Cryosphere, 14, 4217–4231, https://doi.org/10.5194/tc-14-4217-2020, https://doi.org/10.5194/tc-14-4217-2020, 2020
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In this study we present subglacial air, ice and sediment temperatures from within the basal drainage systems of two cold-based glaciers on Svalbard during late spring and the summer melt season. We put the data into the context of air temperature and rainfall at the glacier surface and show the importance of surface events on the subglacial thermal regime and erosion around basal drainage channels. Observed vertical erosion rates thereby reachup to 0.9 m d−1.
Xavier Morel, Birger Hansen, Christine Delire, Per Ambus, Mikhail Mastepanov, and Bertrand Decharme
Earth Syst. Sci. Data, 12, 2365–2380, https://doi.org/10.5194/essd-12-2365-2020, https://doi.org/10.5194/essd-12-2365-2020, 2020
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Nuuk fen site is a well-instrumented Greenlandic site where soil physical variables and greenhouse gas fluxes are monitored. But knowledge of soil carbon stocks and profiles is missing. This is a crucial shortcoming for a complete evaluation of models. For the first time we measured soil carbon and nitrogen density, profiles, and stocks in the Nuuk peatland. This new dataset can contribute to further develop joint modeling of greenhouse gas emissions and soil carbon in land-surface models.
Norbert Pirk, Jakob Sievers, Jordan Mertes, Frans-Jan W. Parmentier, Mikhail Mastepanov, and Torben R. Christensen
Biogeosciences, 14, 3157–3169, https://doi.org/10.5194/bg-14-3157-2017, https://doi.org/10.5194/bg-14-3157-2017, 2017
Christian Stiegler, Magnus Lund, Torben Røjle Christensen, Mikhail Mastepanov, and Anders Lindroth
The Cryosphere, 10, 1395–1413, https://doi.org/10.5194/tc-10-1395-2016, https://doi.org/10.5194/tc-10-1395-2016, 2016
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In this study we investigate the impact of strong variability in snow accumulation during 2 subsequent years (2013–2014) on the land–atmosphere interactions and surface energy exchange in two high-Arctic tundra ecosystems (wet fen and dry heath) in Zackenberg, Northeast Greenland. We observe that the energy balance during the snowmelt periods and growing seasons was strongly regulated by the availability of snow meltwater, with strong impact on the overall ecosystem performance.
Norbert Pirk, Mikhail Mastepanov, Frans-Jan W. Parmentier, Magnus Lund, Patrick Crill, and Torben R. Christensen
Biogeosciences, 13, 903–912, https://doi.org/10.5194/bg-13-903-2016, https://doi.org/10.5194/bg-13-903-2016, 2016
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The exchange of greenhouse gases between the land and the atmosphere is often measured by monitoring the gas concentrations inside a chamber which is placed on the ground. We investigated different ways to calculate the gas exchange rate and identified several different processes which influence the gas exchange measurement.
M. Mastepanov, C. Sigsgaard, T. Tagesson, L. Ström, M. P. Tamstorf, M. Lund, and T. R. Christensen
Biogeosciences, 10, 5139–5158, https://doi.org/10.5194/bg-10-5139-2013, https://doi.org/10.5194/bg-10-5139-2013, 2013
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Revised manuscript accepted for BG
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Raising the groundwater table (GWT) trough subsoil irrigation does not lead to a reduction of carbon emissions from drained peat meadows, even though there was a clear increase in the GWT during summer. Most likely, the largest part of the peat oxidation takes place in the top 70 cm of the soil, which stays above the GWT with the use of subsoil irrigation. We conclude that the use of subsoil irrigation is ineffective as a mitigation measure to sufficiently lower peat oxidation rates.
Yanming Gong, Ping Yue, Kaihui Li, Anwar Mohammat, and Yanyan Liu
Biogeosciences, 18, 3529–3537, https://doi.org/10.5194/bg-18-3529-2021, https://doi.org/10.5194/bg-18-3529-2021, 2021
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At present, data on the influence of asymmetric warming on the GHG flux on a temporal scale are scarce. GHG fluxes were measured using static chambers and a gas chromatograph. Our study showed that the effect of seasonally asymmetrical warming on CO2 flux was obvious, with the GHG flux being able to adapt to continuous warming. Warming in the non-growing season increased the temperature dependence of GHG flux.
Wolfgang Fischer, Christoph Thomas, Nikita Zimov, and Mathias Göckede
Biogeosciences Discuss., https://doi.org/10.5194/bg-2021-110, https://doi.org/10.5194/bg-2021-110, 2021
Revised manuscript accepted for BG
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Arctic permafrost ecosystems may release large amounts of carbon under warmer future climates, and may therefore accelerate global climate change. Our study investigated how long-term grazing by large animals influenced ecosystem characteristics and carbon budgets at a Siberian permafrost site. Our results demonstrate that such management can contribute to stabilize ecosystems to keep carbon in the ground, particularly through drying soils and reducing methane emissions.
Hella van Asperen, João Rafael Alves-Oliveira, Thorsten Warneke, Bruce Forsberg, Alessandro Carioca de Araújo, and Justus Notholt
Biogeosciences, 18, 2609–2625, https://doi.org/10.5194/bg-18-2609-2021, https://doi.org/10.5194/bg-18-2609-2021, 2021
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Termites are insects that are highly abundant in tropical ecosystems. It is known that termites emit CH4, an important greenhouse gas, but their absolute emission remains uncertain. In the Amazon rainforest, we measured CH4 emissions from termite nests and groups of termites. In addition, we tested a fast and non-destructive field method to estimate termite nest colony size. We found that termites play a significant role in an ecosystem's CH4 budget and probably emit more than currently assumed.
Genevieve L. Noyce and J. Patrick Megonigal
Biogeosciences, 18, 2449–2463, https://doi.org/10.5194/bg-18-2449-2021, https://doi.org/10.5194/bg-18-2449-2021, 2021
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Methane (CH4) is a potent greenhouse gas that contributes to global radiative forcing. A mechanistic understanding of how wetland CH4 cycling will respond to global warming is crucial for improving prognostic models. We present results from the first 4 years of a novel whole-ecosystem warming experiment in a coastal wetland, showing that warming increases CH4 emissions and identifying four potential mechanisms that can be added to future modeling efforts.
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.
Ingeborg Bussmann, Irina Fedorova, Bennet Juhls, Pier Paul Overduin, and Matthias Winkel
Biogeosciences, 18, 2047–2061, https://doi.org/10.5194/bg-18-2047-2021, https://doi.org/10.5194/bg-18-2047-2021, 2021
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Arctic rivers, lakes, and bays are affected by a warming climate. We measured the amount and consumption of methane in waters from Siberia under ice cover and in open water. In the lake, methane concentrations under ice cover were much higher than in summer, and methane consumption was highest. The ice cover leads to higher methane concentration under ice. In a warmer Arctic, there will be more time with open water when methane is consumed by bacteria, and less methane will escape into the air.
Elisa Vainio, Olli Peltola, Ville Kasurinen, Antti-Jussi Kieloaho, Eeva-Stiina Tuittila, and Mari Pihlatie
Biogeosciences, 18, 2003–2025, https://doi.org/10.5194/bg-18-2003-2021, https://doi.org/10.5194/bg-18-2003-2021, 2021
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We studied forest floor methane exchange over an area of 10 ha in a boreal pine forest. The results demonstrate high spatial variability in soil moisture and consequently in the methane flux. We detected wet patches emitting high amounts of methane in the early summer; however, these patches turned to methane uptake in the autumn. We concluded that the small-scale spatial variability of the boreal forest methane flux highlights the importance of soil chamber placement in similar studies.
Matthias Koschorreck, Yves T. Prairie, Jihyeon Kim, and Rafael Marcé
Biogeosciences, 18, 1619–1627, https://doi.org/10.5194/bg-18-1619-2021, https://doi.org/10.5194/bg-18-1619-2021, 2021
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The concentration of carbon dioxide (CO2) in water samples is often measured using a gas chromatograph. Depending on the chemical composition of the water, this method can produce wrong results. We quantified the possible error and how it depends on water composition and the analytical procedure. We propose a method to correct wrong results by additionally analysing alkalinity in the samples. We provide an easily usable computer code to perform the correction calculations.
Julia Drewer, Melissa M. Leduning, Robert I. Griffiths, Tim Goodall, Peter E. Levy, Nicholas Cowan, Edward Comynn-Platt, Garry Hayman, Justin Sentian, Noreen Majalap, and Ute M. Skiba
Biogeosciences, 18, 1559–1575, https://doi.org/10.5194/bg-18-1559-2021, https://doi.org/10.5194/bg-18-1559-2021, 2021
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In Southeast Asia, oil palm plantations have largely replaced tropical forests. The impact of this shift in land use on greenhouse gas fluxes and soil microbial communities remains uncertain. We have found emission rates of the potent greenhouse gas nitrous oxide on mineral soil to be higher from oil palm plantations than logged forest over a 2-year study and concluded that emissions have increased over the last 42 years in Sabah, with the proportion of emissions from plantations increasing.
Lutz Merbold, Charlotte Decock, Werner Eugster, Kathrin Fuchs, Benjamin Wolf, Nina Buchmann, and Lukas Hörtnagl
Biogeosciences, 18, 1481–1498, https://doi.org/10.5194/bg-18-1481-2021, https://doi.org/10.5194/bg-18-1481-2021, 2021
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Our study investigated the exchange of the three major greenhouse gases (GHGs) over a temperate grassland prior to and after restoration through tillage in central Switzerland. Our results show that irregular management events, such as tillage, have considerable effects on GHG emissions in the year of tillage while leading to enhanced carbon uptake and similar nitrogen losses via nitrous oxide in the years following tillage to those observed prior to tillage.
Roland Vernooij, Marcos Giongo, Marco Assis Borges, Máximo Menezes Costa, Ana Carolina Sena Barradas, and Guido R. van der Werf
Biogeosciences, 18, 1375–1393, https://doi.org/10.5194/bg-18-1375-2021, https://doi.org/10.5194/bg-18-1375-2021, 2021
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We used drones to measure greenhouse gas emission factors from fires in the Brazilian Cerrado. We compared early-dry-season management fires and late-dry-season fires to determine if fire management can be a tool for abating emissions.
Although we found some evidence of increased CO and CH4 emission factors, the seasonal effect was smaller than that found in previous studies. For N2O, the third most important greenhouse gas, we found opposite trends in grass- and shrub-dominated areas.
Filippo Vingiani, Nicola Durighetto, Marcus Klaus, Jakob Schelker, Thierry Labasque, and Gianluca Botter
Biogeosciences, 18, 1223–1240, https://doi.org/10.5194/bg-18-1223-2021, https://doi.org/10.5194/bg-18-1223-2021, 2021
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Flexible foil chamber design and the anchored deployment might be useful techniques to enhance the robustness and the accuracy of CO2 measurements in low-order streams. Moreover, the study demonstrates the value of analytical and numerical techniques for the estimation of gas exchange velocities. These results may contribute to the development of novel procedures for chamber data analysis which might improve the robustness and reliability of chamber-based CO2 measurements in first-order streams.
Lauri Heiskanen, Juha-Pekka Tuovinen, Aleksi Räsänen, Tarmo Virtanen, Sari Juutinen, Annalea Lohila, Timo Penttilä, Maiju Linkosalmi, Juha Mikola, Tuomas Laurila, and Mika Aurela
Biogeosciences, 18, 873–896, https://doi.org/10.5194/bg-18-873-2021, https://doi.org/10.5194/bg-18-873-2021, 2021
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We studied ecosystem- and plant-community-level carbon (C) exchange between subarctic mire and the atmosphere during 2017–2018. We found strong spatial variation in CO2 and CH4 dynamics between the main plant communities. The earlier onset of growing season in 2018 strengthened the CO2 sink of the ecosystem, but this gain was counterbalanced by a later drought period. Variation in water table level, soil temperature and vegetation explained most of the variation in ecosystem-level C exchange.
Sudhanshu Pandey, Sander Houweling, Alba Lorente, Tobias Borsdorff, Maria Tsivlidou, A. Anthony Bloom, Benjamin Poulter, Zhen Zhang, and Ilse Aben
Biogeosciences, 18, 557–572, https://doi.org/10.5194/bg-18-557-2021, https://doi.org/10.5194/bg-18-557-2021, 2021
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We use atmospheric methane observations from the novel TROPOspheric Monitoring Instrument (TROPOMI; Sentinel-5p) to estimate methane emissions from South Sudan's wetlands. Our emission estimates are an order of magnitude larger than the estimate of process-based wetland models. We find that this underestimation by the models is likely due to their misrepresentation of the wetlands' inundation extent and temperature dependences.
Paula Alejandra Lamprea Pineda, Marijn Bauters, Hans Verbeeck, Selene Baez, Matti Barthel, Samuel Bodé, and Pascal Boeckx
Biogeosciences, 18, 413–421, https://doi.org/10.5194/bg-18-413-2021, https://doi.org/10.5194/bg-18-413-2021, 2021
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Tropical forest soils are an important source and sink of greenhouse gases (GHGs) with tropical montane forests having been poorly studied. In this pilot study, we explored soil fluxes of CO2, CH4, and N2O in an Ecuadorian neotropical montane forest, where a net consumption of N2O at higher altitudes was observed. Our results highlight the importance of short-term variations in N2O and provide arguments and insights for future, more detailed studies on GHG fluxes from montane forest soils.
Bruna R. F. Oliveira, Carsten Schaller, J. Jacob Keizer, and Thomas Foken
Biogeosciences, 18, 285–302, https://doi.org/10.5194/bg-18-285-2021, https://doi.org/10.5194/bg-18-285-2021, 2021
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Forest fires have a significant impact on carbon dioxide emissions. The present study from a pine forest in Portugal is one of the few where measurements of CO2 fluxes were started immediately (1.5 months) after the forest fire. Carbon dioxide emissions were linked to soil humidity. Therefore, they started after the beginning of the rainfall in autumn. Due to the beginning of vegetation, the site was already a carbon dioxide sink the following year.
Hui Zhang, Eeva-Stiina Tuittila, Aino Korrensalo, Aleksi Räsänen, Tarmo Virtanen, Mika Aurela, Timo Penttilä, Tuomas Laurila, Stephanie Gerin, Viivi Lindholm, and Annalea Lohila
Biogeosciences, 17, 6247–6270, https://doi.org/10.5194/bg-17-6247-2020, https://doi.org/10.5194/bg-17-6247-2020, 2020
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We studied the impact of a stream on peatland microhabitats and CH4 emissions in a northern boreal fen. We found that there were higher water levels, lower peat temperatures, and greater oxygen concentrations close to the stream; these supported the highest biomass production but resulted in the lowest CH4 emissions. Further from the stream, the conditions were drier and CH4 emissions were also low. CH4 emissions were highest at an intermediate distance from the stream.
Simon Baumgartner, Matti Barthel, Travis William Drake, Marijn Bauters, Isaac Ahanamungu Makelele, John Kalume Mugula, Laura Summerauer, Nora Gallarotti, Landry Cizungu Ntaboba, Kristof Van Oost, Pascal Boeckx, Sebastian Doetterl, Roland Anton Werner, and Johan Six
Biogeosciences, 17, 6207–6218, https://doi.org/10.5194/bg-17-6207-2020, https://doi.org/10.5194/bg-17-6207-2020, 2020
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Soil respiration is an important carbon flux and key process determining the net ecosystem production of terrestrial ecosystems. The Congo Basin lacks studies quantifying carbon fluxes. We measured soil CO2 fluxes from different forest types in the Congo Basin and were able to show that, even though soil CO2 fluxes are similarly high in lowland and montane forests, the drivers were different: soil moisture in montane forests and C availability in the lowland forests.
Bettina K. Gier, Michael Buchwitz, Maximilian Reuter, Peter M. Cox, Pierre Friedlingstein, and Veronika Eyring
Biogeosciences, 17, 6115–6144, https://doi.org/10.5194/bg-17-6115-2020, https://doi.org/10.5194/bg-17-6115-2020, 2020
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Models from Coupled Model Intercomparison Project (CMIP) phases 5 and 6 are compared to a satellite data product of column-averaged CO2 mole fractions (XCO2). The previously believed discrepancy of the negative trend in seasonal cycle amplitude in the satellite product, which is not seen in in situ data nor in the models, is attributed to a sampling characteristic. Furthermore, CMIP6 models are shown to have made progress in reproducing the observed XCO2 time series compared to CMIP5.
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.
Najeeb Al-Amin Iddris, Marife D. Corre, Martin Yemefack, Oliver van Straaten, and Edzo Veldkamp
Biogeosciences, 17, 5377–5397, https://doi.org/10.5194/bg-17-5377-2020, https://doi.org/10.5194/bg-17-5377-2020, 2020
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We quantified the changes in stem and soil nitrous oxide (N2O) fluxes with forest conversion to cacao agroforestry in the Congo Basin, Cameroon. All forest and cacao trees consistently emitted N2O, contributing 8–38 % of the total (soil and stem) emissions. Forest conversion to extensively managed (>–20 years old) cacao agroforestry had no effect on stem and soil N2O fluxes. Our results highlight the importance of including tree-mediated fluxes in the ecosystem-level N2O budget.
Cédric Morana, Steven Bouillon, Vimac Nolla-Ardèvol, Fleur A. E. Roland, William Okello, Jean-Pierre Descy, Angela Nankabirwa, Erina Nabafu, Dirk Springael, and Alberto V. Borges
Biogeosciences, 17, 5209–5221, https://doi.org/10.5194/bg-17-5209-2020, https://doi.org/10.5194/bg-17-5209-2020, 2020
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A growing body of studies challenges the paradigm that methane (CH4) production occurs only under anaerobic conditions. Our field experiments revealed that oxic CH4 production is closely related to phytoplankton metabolism and is indeed a common feature in five contrasting African lakes. Nevertheless, we found that methanotrophic activity in surface waters and CH4 emissions to the atmosphere were predominantly fuelled by CH4 generated in sediments and physically transported to the surface.
Leandra Stephanie Emilia Praetzel, Nora Plenter, Sabrina Schilling, Marcel Schmiedeskamp, Gabriele Broll, and Klaus-Holger Knorr
Biogeosciences, 17, 5057–5078, https://doi.org/10.5194/bg-17-5057-2020, https://doi.org/10.5194/bg-17-5057-2020, 2020
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Small lakes are important but variable sources of greenhouse gas emissions. We performed lab experiments to determine spatial patterns and drivers of CO2 and CH4 emission and sediment gas production within a lake. The observed high spatial variability of emissions and production could be explained by the degradability of the sediment organic matter. We did not see correlations between production and emissions and suggest on-site flux measurements as the most accurate way for determing emissions.
François Clayer, Yves Gélinas, André Tessier, and Charles Gobeil
Biogeosciences, 17, 4571–4589, https://doi.org/10.5194/bg-17-4571-2020, https://doi.org/10.5194/bg-17-4571-2020, 2020
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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.
David Bastviken, Jonatan Nygren, Jonathan Schenk, Roser Parellada Massana, and Nguyen Thanh Duc
Biogeosciences, 17, 3659–3667, https://doi.org/10.5194/bg-17-3659-2020, https://doi.org/10.5194/bg-17-3659-2020, 2020
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This study presents a low-cost way to measure methane emissions applicable in nature and society. This facilitates widespread and affordable methane measurements, which are greatly needed for verifying that greenhouse gas mitigation is effective and for improved quantification of fluxes and how they are regulated. The paper also describes an open-source do-it-yourself methane–carbon dioxide–humidity–temperature logger, to increase the distributed capacity to measure greenhouse gases.
Fortunat Joos, Renato Spahni, Benjamin D. Stocker, Sebastian Lienert, Jurek Müller, Hubertus Fischer, Jochen Schmitt, I. Colin Prentice, Bette Otto-Bliesner, and Zhengyu Liu
Biogeosciences, 17, 3511–3543, https://doi.org/10.5194/bg-17-3511-2020, https://doi.org/10.5194/bg-17-3511-2020, 2020
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Results of the first globally resolved simulations of terrestrial carbon and nitrogen (N) cycling and N2O emissions over the past 21 000 years are compared with reconstructed N2O emissions. Modelled and reconstructed emissions increased strongly during past abrupt warming events. This evidence appears consistent with a dynamic response of biological N fixation to increasing N demand by ecosystems, thereby reducing N limitation of plant productivity and supporting a land sink for atmospheric CO2.
Xuefei Li, Outi Wahlroos, Sami Haapanala, Jukka Pumpanen, Harri Vasander, Anne Ojala, Timo Vesala, and Ivan Mammarella
Biogeosciences, 17, 3409–3425, https://doi.org/10.5194/bg-17-3409-2020, https://doi.org/10.5194/bg-17-3409-2020, 2020
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We measured CO2 and CH4 fluxes and quantified the global warming potential of different surface areas in a recently created urban wetland in Southern Finland. The ecosystem has a small net climate warming effect which was mainly contributed by the open-water areas. Our results suggest that limiting open-water areas and setting a design preference for areas of emergent vegetation in the establishment of urban wetlands can be a beneficial practice when considering solely the climate impact.
Xiao Ma, Mingshuang Sun, Sinikka T. Lennartz, and Hermann W. Bange
Biogeosciences, 17, 3427–3438, https://doi.org/10.5194/bg-17-3427-2020, https://doi.org/10.5194/bg-17-3427-2020, 2020
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Monthly measurements of dissolved methane (CH4), a potent greenhouse gas, were conducted at Boknis Eck (BE), a time-series station in the southwestern Baltic Sea, from June 2006. In general CH4 concentrations increased with depth. High concentrations in the upper layer were linked to saline water inflow. Eckernförde Bay emitted CH4 to the atmosphere throughout the monitoring period. No significant trend was detected in CH4 concentrations or emissions during 2006–2017.
Elizabeth León-Palmero, Alba Contreras-Ruiz, Ana Sierra, Rafael Morales-Baquero, and Isabel Reche
Biogeosciences, 17, 3223–3245, https://doi.org/10.5194/bg-17-3223-2020, https://doi.org/10.5194/bg-17-3223-2020, 2020
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CH4 emissions from reservoirs are responsible for the majority of the climatic forcing of these ecosystems. The origin of the recurrent CH4 supersaturation in oxic waters is still controversial. We found that the dissolved CH4 concentration varied by up to 4 orders of magnitude in the water column of 12 reservoirs and was consistently supersaturated. Our findings suggest that photosynthetic picoeukaryotes can play a significant role in determining CH4 concentration in oxic waters.
Marcus B. Wallin, Joachim Audet, Mike Peacock, Erik Sahlée, and Mattias Winterdahl
Biogeosciences, 17, 2487–2498, https://doi.org/10.5194/bg-17-2487-2020, https://doi.org/10.5194/bg-17-2487-2020, 2020
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Here we show that small streams draining agricultural areas are potential hotspots for emissions of CO2 to the atmosphere. We further conclude that the variability in stream CO2 concentration over time is very high, caused by variations in both water discharge and primary production. Given the observed high levels of CO2 and its temporally variable nature, agricultural streams clearly need more attention in order to understand and incorporate these dynamics in large-scale extrapolations.
Quan Zhang, Huimin Lei, Dawen Yang, Lihua Xiong, Pan Liu, and Beijing Fang
Biogeosciences, 17, 2245–2262, https://doi.org/10.5194/bg-17-2245-2020, https://doi.org/10.5194/bg-17-2245-2020, 2020
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Research into climate change has been popular over the past few decades. Greenhouse gas emissions are found to be responsible for climate change. Among all the ecosystems, cropland is the main food source for mankind, therefore its carbon cycle and contribution to the global carbon balance interest us. Our evaluation of the typical wheat–maize rotation cropland over the North China Plain shows it is a net CO2 emission to the atmosphere and that emissions will continue to rise in the future.
Sheila Wachiye, Lutz Merbold, Timo Vesala, Janne Rinne, Matti Räsänen, Sonja Leitner, and Petri Pellikka
Biogeosciences, 17, 2149–2167, https://doi.org/10.5194/bg-17-2149-2020, https://doi.org/10.5194/bg-17-2149-2020, 2020
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Limited data on emissions in Africa translate into uncertainty during GHG budgeting. We studied annual CO2, N2O, and CH4 emissions in four land-use types in Kenyan savanna using static chambers and gas chromatography. CO2 emissions varied between seasons and land-use types. Soil moisture and vegetation explained the seasonal variation, while soil temperature was insignificant. N2O and CH4 emissions did not vary at all sites. Our results are useful in climate change mitigation interventions.
Celina Burkholz, Neus Garcias-Bonet, and Carlos M. Duarte
Biogeosciences, 17, 1717–1730, https://doi.org/10.5194/bg-17-1717-2020, https://doi.org/10.5194/bg-17-1717-2020, 2020
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Seagrass meadows store carbon in their biomass and sediments, but they have also been shown to be sources of carbon dioxide (CO2) and methane (CH4). We experimentally investigated the effect of warming and prolonged darkness on CO2 and CH4 fluxes in Red Sea seagrass (Halophila stipulacea) communities. Our results indicated that sublethal warming may lead to increased emissions of greenhouse gases from seagrass meadows which may contribute to further enhance global warming.
Chris R. Flechard, Andreas Ibrom, Ute M. Skiba, Wim de Vries, Marcel van Oijen, David R. Cameron, Nancy B. Dise, Janne F. J. Korhonen, Nina Buchmann, Arnaud Legout, David Simpson, Maria J. Sanz, Marc Aubinet, Denis Loustau, Leonardo Montagnani, Johan Neirynck, Ivan A. Janssens, Mari Pihlatie, Ralf Kiese, Jan Siemens, André-Jean Francez, Jürgen Augustin, Andrej Varlagin, Janusz Olejnik, Radosław Juszczak, Mika Aurela, Daniel Berveiller, Bogdan H. Chojnicki, Ulrich Dämmgen, Nicolas Delpierre, Vesna Djuricic, Julia Drewer, Eric Dufrêne, Werner Eugster, Yannick Fauvel, David Fowler, Arnoud Frumau, André Granier, Patrick Gross, Yannick Hamon, Carole Helfter, Arjan Hensen, László Horváth, Barbara Kitzler, Bart Kruijt, Werner L. Kutsch, Raquel Lobo-do-Vale, Annalea Lohila, Bernard Longdoz, Michal V. Marek, Giorgio Matteucci, Marta Mitosinkova, Virginie Moreaux, Albrecht Neftel, Jean-Marc Ourcival, Kim Pilegaard, Gabriel Pita, Francisco Sanz, Jan K. Schjoerring, Maria-Teresa Sebastià, Y. Sim Tang, Hilde Uggerud, Marek Urbaniak, Netty van Dijk, Timo Vesala, Sonja Vidic, Caroline Vincke, Tamás Weidinger, Sophie Zechmeister-Boltenstern, Klaus Butterbach-Bahl, Eiko Nemitz, and Mark A. Sutton
Biogeosciences, 17, 1583–1620, https://doi.org/10.5194/bg-17-1583-2020, https://doi.org/10.5194/bg-17-1583-2020, 2020
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Experimental evidence from a network of 40 monitoring sites in Europe suggests that atmospheric nitrogen deposition to forests and other semi-natural vegetation impacts the carbon sequestration rates in ecosystems, as well as the net greenhouse gas balance including other greenhouse gases such as nitrous oxide and methane. Excess nitrogen deposition in polluted areas also leads to other environmental impacts such as nitrogen leaching to groundwater and other pollutant gaseous emissions.
Cited articles
Abermann, J., Hansen, B., Lund, M., Wacker, S., Karami, M., and Cappelen,
J.: Hotspots and key periods of Greenland climate change during the past six
decades, Ambio, 46, 3–11, https://doi.org/10.1007/s13280-016-0861-y, 2017.
AMAP: AMAP assessment 2015: Methane as an Arctic climate forcer, Arctic
Monitoring and Assessment Programme (AMAP), Oslo, Norway, Oslo, Norway, 152
pp., 2015.
AMAP: Snow, Water and Permafrost in the Arctic (SWIPA) 2017, Oslo, Norway,
269 pp., 2017.
Andresen, C. G., Lara, M. J., Tweedie, C. E., and Lougheed, V. L.: Rising
plant-mediated methane emissions from arctic wetlands, Glob. Change
Biol., 23, 1128–1139, https://doi.org/10.1111/gcb.13469, 2017.
Bay, C.: Vegetation mapping of Zackenberg valley, northeast Greenland,
Danish Polar Center and Botanical Museum, University of Copenhagen, 1998.
Bosse, U. and Frenzel, P.: CH4 emissions from a West Siberian mire, Suo,
52, 99–114, 2001.
Cable, S., Christiansen, H. H., Westergaard-Nielsen, A., Kroon, A., and
Elberling, B.: Geomorphological and cryostratigraphical analyses of the
Zackenberg Valley, NE Greenland and significance of Holocene alluvial fans,
Geomorphology, 303, 504–523, https://doi.org/10.1016/j.geomorph.2017.11.003, 2018.
Christensen, T. R.: Methane emission from Arctic tundra, Biogeochemistry,
21, 117–139, https://doi.org/10.1007/bf00000874, 1993.
Christensen, T. R.: Climate science: Understand Arctic methane variability,
Nature, 509, 279–281, https://doi.org/10.1038/509279a, 2014.
Christensen, T. R., Friborg, T., Sommerkorn, M., Kaplan, J., Illeris, L.,
Søgaard, H., Nordstrøm, C., and Jonasson, S.: Trace gas exchange in a
high-arctic valley 1. Variations in CO2 and CH4 flux between tundra
vegetation types, Global Biogeochem. Cy., 14, 701–713, https://doi.org/10.1029/1999gb001134, 2000.
Christensen, T. R., Johansson, T. R., Akerman, H. J., Mastepanov, M.,
Malmer, N., Friborg, T., Crill, P., and Svensson, B. H.: Thawing sub-arctic
permafrost: Effects on vegetation and methane emissions, Geophys.
Res. Lett., 31, L04501, https://doi.org/10.1029/2003gl018680, 2004.
Christensen, T. R., Arndal, M. F., and Topp-Jørgensen, E.: Greenland
Ecosystem Monitoring Annual Report Cards 2019, DCE – Danish Centre for
Environment and Energy, Aarhus University, Aarhus, Denmark, 40 pp., 2020a.
Christensen, T. R., Lund, M., Skov, K., Abermann, J., López-Blanco, E.,
Scheller, J., Scheel, M., Jackowicz-Korczynski, M., Langley, K., Murphy, M.
J., and Mastepanov, M.: Multiple Ecosystem Effects of Extreme Weather Events
in the Arctic, Ecosystems, 24, 122–136, https://doi.org/10.1007/s10021-020-00507-6, 2020b.
Christiansen, H. H., Sigsgaard, C., Humlum, O., Rasch, M., and Hansen, B.
U.: Permafrost and Periglacial Geomorphology at Zackenberg, in: High-Arctic
Ecosystem Dynamics in a Changing Climate, Advances in Ecological Research,
151–174, Amsterdam, the Netherlands, 2008.
COWI: eBee saves the day: mapping Greenland's Zackenberg Research Station, available at:
https://www.sensefly.com/app/uploads/2017/11/eBee_saves_day_mapping_greenlands_zackenberg_research_station.pdf (last access: 23 June 2021), 2015.
Crill, P. M., Bartlett, K. B., Harriss, R. C., Gorham, E., Verry, E. S.,
Sebacher, D. I., Madzar, L., and Sanner, W.: Methane flux from Minnesota
peatlands, Global Biogeochem. Cy., 2, 371–384, https://doi.org/10.1029/gb002i004p00371, 1988.
Ehhalt, D. H.: The atmospheric cycle of methane, Tellus, 26, 58–70, https://doi.org/10.3402/tellusa.v26i1-2.9737, 1974.
Elberling, B., Tamstorf, M. P., Michelsen, A., Arndal, M. F., Sigsgaard, C.,
Illeris, L., Bay, C., Hansen, B. U., Christensen, T. R., Hansen, E. S.,
Jakobsen, B. H., and Beyens, L.: Soil and Plant Community-Characteristics
and Dynamics at Zackenberg, in: Advances in Ecological Research: High-Arctic
Ecosystem Dynamics in a Changing Climate, Elsevier, Amsterdam, the Netherlands, 223–248, 2008.
Engram, M., Anthony, K. M. W., Sachs, T., Kohnert, K., Serafimovich, A.,
Grosse, G., and Meyer, F. J.: Remote sensing northern lake methane
ebullition, Nat. Clim. Change, 10, 511–517, https://doi.org/10.1038/s41558-020-0762-8, 2020.
Falk, J. M., Schmidt, N. M., and Ström, L.: Effects of simulated
increased grazing on carbon allocation patterns in a high arctic mire,
Biogeochemistry, 119, 229–244, https://doi.org/10.1007/s10533-014-9962-5, 2014.
Falk, J. M., Schmidt, N. M., Christensen, T. R., and Ström, L.: Large
herbivore grazing affects the vegetation structure and greenhouse gas
balance in a high arctic mire, Environ. Res. Lett., 10, 045001, https://doi.org/10.1088/1748-9326/10/4/045001, 2015.
Fan, S. M., Wofsy, S. C., Bakwin, P. S., Jacob, D. J., Anderson, S. M.,
Kebabian, P. L., McManus, J. B., Kolb, C. E., and Fitzjarrald, D. R.:
Micrometeorological measurements of CH4 and CO2 exchange between the
atmosphere and subarctic tundra, J. Geophys. Res., 97,
16627–16643, https://doi.org/10.1029/91jd02531, 1992.
Farquharson, L. M., Romanovsky, V. E., Cable, W. L., Walker, D. A., Kokelj,
S. V., and Nicolsky, D.: Climate Change Drives Widespread and Rapid
Thermokarst Development in Very Cold Permafrost in the Canadian High Arctic,
Geophys. Res. Lett., 46, 6681–6689, https://doi.org/10.1029/2019gl082187,
2019.
Friborg, T., Christensen, T. R., Hansen, B. U., Nordstrøm, C., and
Søgaard, H.: Trace gas exchange in a high-Arctic valley 2. Landscape CH4
fluxes measured and modeled using eddy correlation data, Global
Biogeochem. Cy., 14, 715–723, https://doi.org/10.1029/1999gb001136, 2000.
Geng, M. S., Christensen, J. H., and Christensen, T. R.: Potential future
methane emission hot spots in Greenland, Environ. Res. Lett., 14, 035001, https://doi.org/10.1088/1748-9326/aaf34b, 2019.
Greenland Ecosystem Monitoring: GeoBasis Zackenberg – Hydrology – AC_Water_level_automatic, Greenland Ecosystem Monitoring [data set], https://doi.org/10.17897/MJ7B-Z461, 2021a.
Greenland Ecosystem Monitoring: GeoBasis Zackenberg – Hydrology – AC_Water_level_manual, Greenland Ecosystem Monitoring [data set], https://doi.org/10.17897/6HCP-M521, 2021b.
Greenland Ecosystem Monitoring: ClimateBasis Zackenberg – Air temperature – Air temperature, 200 cm @ 60 min sample (∘C), Greenland Ecosystem Monitoring [data set], https://doi.org/10.17897/XV96-HC57, 2021c.
Greenland Ecosystem Monitoring: GeoBasis Zackenberg – Flux monitoring – AC, Greenland Ecosystem Monitoring [data set], https://doi.org/10.17897/430P-DS31, 2021d.
Greenland Ecosystem Monitoring: GeoBasis Zackenberg – Soil properties – Mix-1_Soil_moisture, Greenland Ecosystem Monitoring [data set], https://doi.org/10.17897/ENNB-T831, 2021e.
Greenland Ecosystem Monitoring: GeoBasis Zackenberg – Snow properties – Snow cover (Central area), Greenland Ecosystem Monitoring [data set], https://doi.org/10.17897/499C-H459, 2021f.
Greenland Ecosystem Monitoring: ClimateBasis Zackenberg – Soil temperature – Soil temperature, 20 cm – 60 min average (∘C), Greenland Ecosystem Monitoring [data set], https://doi.org/10.17897/XW7C-NA36, 2021g.
Grøndahl, L., Friborg, T., Christensen, T. R., Ekberg, A., Elberling, B.,
Illeris, L., Nordstrøm, C., Rennermalm, Å., Sigsgaard, C., and
Søgaard, H.: Spatial and inter-annual variability of trace gas fluxes in
a heterogeneous high-arctic landscape, in: Advances in Ecological Research:
High-Arctic Ecosystem Dynamics in a Changing Climate, Elsevier, Amsterdam, the Netherlands, 473–498,
2008.
Hartley, I. P., Hill, T. C., Wade, T. J., Clement, R. J., Moncrieff, J. B.,
Prieto-Blanco, A., Disney, M. I., Huntley, B., Williams, M., Howden, N. J.
K., Wookey, P. A., and Baxter, R.: Quantifying landscape-level methane
fluxes in subarctic Finland using a multiscale approach, Glob. Change
Biol., 21, 3712–3725, https://doi.org/10.1111/gcb.12975, 2015.
Heikkinen, J. E. P., Virtanen, T., Huttunen, J. T., Elsakov, V., and
Martikainen, P. J.: Carbon balance in East European tundra, Global
Biogeochem. Cy., 18, GB1023, https://doi.org/10.1029/2003gb002054, 2004.
IPCC: Climate Change The IPCC Scientific Assessment, Intergovernmental Panel
on Climate Change, Cambridge, 1990.
Jackowicz-Korczynski, M., Christensen, T. R., Bäckstrand, K., Crill, P.,
Friborg, T., Mastepanov, M., and Ström, L.: Annual cycle of methane
emission from a subarctic peatland, J. Geophys. Res., 115,
G02009, https://doi.org/10.1029/2008jg000913, 2010.
Joabsson, A. and Christensen, T. R.: Methane emissions from wetlands and
their relationship with vascular plants: an Arctic example, Glob. Change
Biol., 7, 919–932, https://doi.org/10.1046/j.1354-1013.2001.00044.x, 2001.
Jorgenson, M. T., Schur, Y. L., and Osterkamp, T. E.: Thermokarst in Alaska,
Ninth International Conference on Permafrost, Fairbanks, 869–876, 2008.
Jørgensen, C. J., Lund Johansen, K. M., Westergaard-Nielsen, A., and
Elberling, B.: Net regional methane sink in High Arctic soils of northeast
Greenland, Nat. Geosci., 8, 20–23, https://doi.org/10.1038/ngeo2305, 2015.
Kokelj, S. V. and Jorgenson, M. T.: Advances in Thermokarst Research,
Permafrost Periglac. Process., 24, 108–119, https://doi.org/10.1002/ppp.1779,
2013.
Lewkowicz, A. G. and Way, R. G.: Extremes of summer climate trigger
thousands of thermokarst landslides in a High Arctic environment, Nat.
Commun., 10, 1329, https://doi.org/10.1038/s41467-019-09314-7, 2019.
Linnet, K.: Estimation of the linear relationship between the measurements
of two methods with proportional errors, Stat. Med., 9,
1463–1473, https://doi.org/10.1002/sim.4780091210, 1990.
Livingston, G. and Hutchinson, G.: Enclosure-based measurement of trace gas
exchange: applications and sources of error, in: Biogenic trace gases:
measuring emissions from soil and water, edited by: Matson, P. A. A. H.,
R.C., Blackwell Science Ltd., 14–51, Amsterdam, the Netherlands, 1995.
López-Blanco, E., Jackowicz-Korczynski, M. A., Mastepanov, M., Skov, K.,
Westergaard-Nielsen, A., Williams, M., and Christensen, T.: Multi-year
data-model evaluation reveals the importance of nutrient availability over
climate in arctic ecosystem C dynamics, Environ. Res. Lett., 15, 094007,
https://doi.org/10.1088/1748-9326/ab865b, 2020.
Mastepanov, M., Sigsgaard, C., Dlugokencky, E. J., Houweling, S., Ström,
L., Tamstorf, M. P., and Christensen, T. R.: Large tundra methane burst
during onset of freezing, Nature, 456, 628–630, https://doi.org/10.1038/nature07464,
2008.
Mastepanov, M., Sigsgaard, C., Tagesson, T., Ström, L., Tamstorf, M. P., Lund,
M., and Christensen, T. R.: Revisiting factors controlling methane emissions
from high-Arctic tundra, Biogeosciences, 10, 5139–5158, https://doi.org/10.5194/bg-10-5139-2013, 2013.
Mastepanov, M., Pirk, N., Lopez-Blanco, E., Skov, K., Rudd, D.,
Jackowicz-Korczynski, M., Tamstorf, M., Scheller, J., and Christensen, T.
R.: Fifteen years of methane flux measurements in high-arctic tundra, in
preparation, 2021.
McGuire, A. D., Christensen, T. R., Hayes, D., Heroult, A., Euskirchen, E., Kimball,
J. S., Koven, C., Lafleur, P., Miller, P. A., Oechel, W., Peylin, P., Williams, M.,
and Yi, Y.: An assessment of the carbon balance of Arctic tundra: comparisons among
observations, process models, and atmospheric inversions, Biogeosciences, 9, 3185–3204, https://doi.org/10.5194/bg-9-3185-2012, 2012.
Meltofte, H. and Rasch, M.: The Study Area at Zackenberg, in: Advances in
Ecological Research: High-Arctic Ecosystem Dynamics in a Changing Climate,
Elsevier, Amsterdam, the Netherlands, 101–110, 2008.
Meltofte, H., Christensen, T. R., Elberling, B., Forchhammer, M. C., and
Rasch, M.: Introduction, in: Advances in Ecological Research: High-Arctic
Ecosystem Dynamics in a Changing Climate, Elsevier, Amsterdam, the Netherlands, 1–12, 2008.
Morozumi, T., Shingubara, R., Suzuki, R., Kobayashi, H., Tei, S., Takano,
S., Fan, R., Liang, M., Maximov, T., and Sugimoto, A.: Estimating methane
emissions using vegetation mapping in the taiga–tundra boundary of a
north-eastern Siberian lowland, Tellus B,
71, 1581004, https://doi.org/10.1080/16000889.2019.1581004, 2019.
Morrissey, L. A. and Livingston, G. P.: Methane emissions from Alaska
Arctic tundra: An assessment of local spatial variability, J.
Geophys. Res.-Atmos., 97, 16661–16670, https://doi.org/10.1029/92jd00063,
1992.
Nisbet, E. G., Manning, M. R., Dlugokencky, E. J., Fisher, R. E., Lowry, D.,
Michel, S. E., Myhre, C. L., Platt, M., Allen, G., Bousquet, P., Brownlow,
R., Cain, M., France, J. L., Hermansen, O., Hossaini, R., Jones, A. E.,
Levin, I., Manning, A. C., Myhre, G., Pyle, J. A., Vaughn, B. H., Warwick,
N. J., and White, J. W. C.: Very Strong. Atmospheric Methane Growth in the 4
Years 2014–2017: Implications for the paris Agreement, Global Biogeochem.
Cy., 33, 318–342, https://doi.org/10.1029/2018gb006009, 2019.
Oh, Y., Zhuang, Q. L., Liu, L. C., Welp, L. R., Lau, M. C. Y., Onstott, T.
C., Medvigy, D., Bruhwiler, L., Dlugokencky, E. J., Hugelius, G., D'Imperio,
L., and Elberling, B.: Reduced net methane emissions due to microbial
methane oxidation in a warmer Arctic, Nat. Clim. Change, 10, 317–321,
https://doi.org/10.1038/s41558-020-0734-z, 2020.
Olefeldt, D., Goswami, S., Grosse, G., Hayes, D., Hugelius, G., Kuhry, P.,
McGuire, A. D., Romanovsky, V. E., Sannel, A. B., Schuur, E. A., and
Turetsky, M. R.: Circumpolar distribution and carbon storage of thermokarst
landscapes, Nat. Commun., 7, 13043, https://doi.org/10.1038/ncomms13043, 2016.
Parmentier, F., Van Huissteden, J., Van Der Molen, M., Schaepman-Strub, G.,
Karsanaev, S., Maximov, T., and Dolman, A.: Spatial and temporal dynamics in
eddy covariance observations of methane fluxes at a tundra site in
northeastern Siberia, J. Geophys. Res., 116, G03016, https://doi.org/10.1029/2010jg001637, 2011.
Pedersen, S. H., Tamstorf, M. P., Abermann, J., Westergaard-Nielsen, A.,
Lund, M., Skov, K., Sigsgaard, C., Mylius, M. R., Hansen, B. U., Liston, G.
E., and Schmidt, N. M.: Spatiotemporal Characteristics of Seasonal Snow
Cover in Northeast Greenland from in Situ Observations, Arct. Antarctic
Alp. Res., 48, 653–671, https://doi.org/10.1657/aaar0016-028, 2016.
Pirk, N., Mastepanov, M., Parmentier, F.-J. W., Lund, M., Crill, P., and Christensen, T. R.: Calculations of automatic chamber flux measurements of methane and carbon dioxide using short time series of concentrations, Biogeosciences, 13, 903–912, https://doi.org/10.5194/bg-13-903-2016, 2016a.
Pirk, N., Tamstorf, M. P., Lund, M., Mastepanov, M., Pedersen, S. H.,
Mylius, M. R., Parmentier, F. J. W., Christiansen, H. H., and Christensen,
T. R.: Snowpack fluxes of methane and carbon dioxide from high Arctic
tundra, J. Geophys. Res.-Biogeo., 121, 2886–2900,
https://doi.org/10.1002/2016jg003486, 2016b.
QGIS.org: QGIS Geographic Information System v. 3.18.1, Open Source Geospatial Foundation Project, 2021.
R Core Team: R: A language and environment for statistical computing v. 4.0.2, R Foundation for Statistical Computing, 2021.
Roulet, N. T., Jano, A., Kelly, C., Klinger, L., Moore, T., Protz, R.,
Ritter, J., and Rouse, W.: Role of the Hudson Bay lowland as a source of
atmospheric methane, J. Geophys. Res.-Atmos., 99,
1439–1454, https://doi.org/10.1029/93jd00261, 1994.
Sachs, T., Wille, C., Boike, J., and Kutzbach, L.: Environmental controls on
ecosystem-scale CH4 emission from polygonal tundra in the Lena River Delta,
Siberia, J. Geophys. Res., 113, G00A03, https://doi.org/10.1029/2007jg000505,
2008.
Schneider, J., Grosse, G., and Wagner, D.: Land cover classification of
tundra environments in the Arctic Lena Delta based on Landsat 7 ETM+ data
and its application for upscaling of methane emissions, Remote Sens.
Environ., 113, 380–391, https://doi.org/10.1016/j.rse.2008.10.013, 2009.
Schuur, E. A., McGuire, A. D., Schadel, C., Grosse, G., Harden, J. W.,
Hayes, D. J., Hugelius, G., Koven, C. D., Kuhry, P., Lawrence, D. M.,
Natali, S. M., Olefeldt, D., Romanovsky, V. E., Schaefer, K., Turetsky, M.
R., Treat, C. C., and Vonk, J. E.: Climate change and the permafrost carbon
feedback, Nature, 520, 171–179, https://doi.org/10.1038/nature14338, 2015.
Shakhova, N., Semiletov, I., Leifer, I., Sergienko, V., Salyuk, A., Kosmach,
D., Chernykh, D., Stubbs, C., Nicolsky, D., Tumskoy, V., and Gustafsson,
Ö.: Ebullition and storm-induced methane release from the East Siberian
Arctic Shelf, Nat. Geosci., 7, 64–70, https://doi.org/10.1038/ngeo2007, 2014.
Stiegler, C., Lund, M., Christensen, T. R., Mastepanov, M., and Lindroth, A.: Two years with extreme and little snowfall: effects on energy partitioning and surface energy exchange in a high-Arctic tundra ecosystem, The Cryosphere, 10, 1395–1413, https://doi.org/10.5194/tc-10-1395-2016, 2016.
Ström, L., Ekberg, A., Mastepanov, M., and Christensen, T. R.: The
effect of vascular plants on carbon turnover and methane emissions from a
tundra wetland, Glob. Change Biol., 9, 1185–1192, https://doi.org/10.1046/j.1365-2486.2003.00655.x, 2003.
Ström, L., Falk, J. M., Skov, K., Jackowicz-Korczynski, M., Mastepanov,
M., Christensen, T. R., Lund, M., and Schmidt, N. M.: Controls of spatial
and temporal variability in CH4 flux in a high arctic fen over three years,
Biogeochemistry, 125, 21–35, https://doi.org/10.1007/s10533-015-0109-0, 2015.
Svensson, B. H. and Rosswall, T.: In situ Methane Production from Acid Peat
in Plant Communities with Different Moisture Regimes in a Subarctic Mire,
Oikos, 43, 341–350, https://doi.org/10.2307/3544151, 1984.
Søgaard, H., Nordstrøm, C., Friborg, T., and Hansen, B. U.: Trace gas
exchange in a high-arctic valley 3. Integrating and scaling CO2 fluxes from
canopy to landscape using flux data, footprint modeling, and remote sensing,
Global Biogeochem. Cy., 14, 725–744, https://doi.org/10.1029/1999gb001137, 2000.
Søndergaard, J., Tamstorf, M., Elberling, B., Larsen, M. M., Mylius, M.
R., Lund, M., Abermann, J., and Rigét, F.: Mercury exports from a
High-Arctic river basin in Northeast Greenland (74∘ N) largely
controlled by glacial lake outburst floods, Sci. Total
Environ., 514, 83–91, https://doi.org/10.1016/j.scitotenv.2015.01.097, 2015.
Tagesson, T., Molder, M., Mastepanov, M., Sigsgaard, C., Tamstorf, M. P.,
Lund, M., Falk, J. M., Lindroth, A., Christensen, T. R., and Ström, L.:
Land-atmosphere exchange of methane from soil thawing to soil freezing in a
high-Arctic wet tundra ecosystem, Glob. Change Biol., 18, 1928–1940, https://doi.org/10.1111/j.1365-2486.2012.02647.x, 2012.
Tagesson, T., Mastepanov, M., Mölder, M., Tamstorf, M. P., Eklundh, L.,
Smith, B., Sigsgaard, C., Lund, M., Ekberg, A., Falk, J. M., Friborg, T.,
Christensen, T. R., and Ström, L.: Modelling of growing season methane
fluxes in a high-Arctic wet tundra ecosystem 1997–2010 using in situ and
high-resolution satellite data, Tellus B,
65, https://doi.org/10.3402/tellusb.v65i0.19722, 2013.
Thornton, B. F., Prytherch, J., Andersson, K., Brooks, I. M., Salisbury, D.,
Tjernström, M., and Crill, P. M.: Shipborne eddy covariance observations
of methane fluxes constrain Arctic sea emissions, Sci. Adv., 6,
eaay7934, https://doi.org/10.1126/sciadv.aay7934, 2020.
Tomczyk, A. M. and Ewertowski, M. W.: UAV-based remote sensing of immediate
changes in geomorphology following a glacial lake outburst flood at the
Zackenberg river, northeast Greenland, J. Maps, 16, 86–100, https://doi.org/10.1080/17445647.2020.1749146, 2020.
Tomczyk, A. M., Ewertowski, M. W., and Carrivick, J. L.: Geomorphological
impacts of a glacier lake outburst flood in the high arctic Zackenberg
River, NE Greenland, J. Hydrol., 591, 125300, https://doi.org/10.1016/j.jhydrol.2020.125300, 2020.
Turetsky, M. R., Abbott, B. W., Jones, M. C., Anthony, K. W., Olefeldt, D.,
Schuur, E. A. G., Grosse, G., Kuhry, P., Hugelius, G., Koven, C., Lawrence,
D. M., Gibson, C., Sannel, A. B. K., and McGuire, A. D.: Carbon release
through abrupt permafrost thaw, Nat. Geosci., 13, 138–145, https://doi.org/10.1038/s41561-019-0526-0, 2020.
Walter Anthony, K., Schneider von Deimling, T., Nitze, I., Frolking, S.,
Emond, A., Daanen, R., Anthony, P., Lindgren, P., Jones, B., and Grosse, G.:
21st-century modeled permafrost carbon emissions accelerated by abrupt thaw
beneath lakes, Nat. Commun., 9, 3262, https://doi.org/10.1038/s41467-018-05738-9, 2018.
Westermann, S., Elberling, B., Højlund Pedersen, S., Stendel, M., Hansen, B. U., and Liston, G. E.: Future permafrost conditions along environmental gradients in Zackenberg, Greenland, The Cryosphere, 9, 719–735, https://doi.org/10.5194/tc-9-719-2015, 2015.
Whalen, S. C. and Reeburgh, W. S.: A methane flux time series for tundra
environments, Global Biogeochem. Cy., 2, 399–409, https://doi.org/10.1029/gb002i004p00399, 1988.
Wickland, K. P., Jorgenson, M. T., Koch, J. C., Kanevskiy, M., and Striegl,
R. G.: Carbon dioxide and methane flux in a dynamic Arctic tundra landscape:
Decadal-scale impacts of ice-wedge degradation and stabilization,
Geophys. Res. Lett., 47, e2020GL089894, https://doi.org/10.1029/2020gl089894,
2020.
Wille, C., Kutzbach, L., Sachs, T., Wagner, D., and Pfeiffer, E. M.: Methane
emission from Siberian arctic polygonal tundra: eddy covariance measurements
and modeling, Glob. Change Biol., 14, 1395–1408, https://doi.org/10.1111/j.1365-2486.2008.01586.x, 2008.
Short summary
Our study presents a time series of methane emissions in a high-Arctic-tundra landscape over 14 summers, which shows large variations between years. The methane emissions from the valley are expected to more than double in the late 21st century. This warming increases permafrost thaw, which could increase surface erosion in the valley. Increased erosion could offset some of the rise in methane fluxes from the valley, but this would require large-scale impacts on vegetated surfaces.
Our study presents a time series of methane emissions in a high-Arctic-tundra landscape over 14...
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