Articles | Volume 20, issue 14
https://doi.org/10.5194/bg-20-2837-2023
https://doi.org/10.5194/bg-20-2837-2023
Research article
 | 
17 Jul 2023
Research article |  | 17 Jul 2023

Simulated methane emissions from Arctic ponds are highly sensitive to warming

Zoé Rehder, Thomas Kleinen, Lars Kutzbach, Victor Stepanenko, Moritz Langer, and Victor Brovkin

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Cited articles

Abnizova, A., Siemens, J., Langer, M., and Boike, J.: Small ponds with major impact: The relevance of ponds and lakes in permafrost landscapes to carbon dioxide emissions, Global Biogeochem. Cy., 26, GB2041, https://doi.org/10.1029/2011GB004237, 2012. a, b
Anderson, L., Birks, J., Rover, J., and Guldager, N.: Controls on recent Alaskan lake changes identified from water isotopes and remote sensing, Geophys. Res. Lett., 40, 3413–3418, https://doi.org/10.1002/grl.50672, 2013. a
Andresen, C. G. and Lougheed, V. L.: Disappearing Arctic tundra ponds: Fine-scale analysis of surface hydrology in drained thaw lake basins over a 65year period (1948–2013), J. Geophys. Res.-Biogeo., 120, 466–479, https://doi.org/10.1002/2014jg002778, 2015. a, b, c
Andresen, C. G., Lara, M. J., Tweedie, C. E., and Lougheed, V. L.: Rising plant-mediated methane emissions from arctic wetlands, Global Change Biol., 23, 1128–1139, https://doi.org/10.1111/gcb.13469, 2017. a, b, c, d, e
Bazhin, N. M.: Gas transport in a residual layer of a water basin, Chemosphere, 3, 33–40, https://doi.org/10.1016/S1465-9972(00)00041-6, 2001. a
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Short summary
We use a new model to investigate how methane emissions from Arctic ponds change with warming. We find that emissions increase substantially. Under annual temperatures 5 °C above present temperatures, pond methane emissions are more than 3 times higher than now. Most of this increase is caused by an increase in plant productivity as plants provide the substrate microbes used to produce methane. We conclude that vegetation changes need to be included in predictions of pond methane emissions.
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