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BG | Articles | Volume 17, issue 15
Biogeosciences, 17, 4025–4042, 2020
https://doi.org/10.5194/bg-17-4025-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Biogeosciences, 17, 4025–4042, 2020
https://doi.org/10.5194/bg-17-4025-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 10 Aug 2020

Research article | 10 Aug 2020

Environmental controls on ecosystem-scale cold-season methane and carbon dioxide fluxes in an Arctic tundra ecosystem

Dean Howard et al.

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Revised manuscript accepted for BG

Cited articles

Agnan, Y., Douglas, T. A., Helmig, D., Hueber, J., and Obrist, D.: Mercury in the Arctic tundra snowpack: temporal and spatial concentration patterns and trace gas exchanges, The Cryosphere, 12, 1939–1956, https://doi.org/10.5194/tc-12-1939-2018, 2018. a, b
Björkman, M. P., Morgner, E., Cooper, E. J., Elberling, B., Klemedtsson, L., and Björk, R. G.: Winter carbon dioxide effluxes from Arctic ecosystems: An overview and comparison of methodologies, Global Biogeochem. Cy., 24, 10, https://doi.org/10.1029/2009GB003667, 2010. a
Boone, D. R.: Biological Formation and Consumption of Methane, in: Atmospheric Methane, edited by: Khalil, M. A. K., Springer, Berlin, Heidelberg, 42–62, https://doi.org/10.1007/978-3-662-04145-1_4, 2000. a
Breiman, L., Friedman, J., Stone, C. J., and Olshen, R. A.: Classification and regression trees, Wadsworth Statistics/Probability Series, CRC press, Boca Raton, FL, USA, 1984. a
Businger, J. A., Wyngaard, J. C., Izumi, Y., and Bradley, E. F.: Flux-Profile Relationships in the Atmospheric Surface Layer, J. Atmos. Sci., 28, 181–189, https://doi.org/10.1175/1520-0469(1971)028<0181:FPRITA>2.0.CO;2, 1971. a
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The Arctic tundra represents a vast store of carbon that may be broken down by microbial activity into greenhouse gases such as CO2 and CH4. Though microbes are less active in winter, the long duration of the cold season makes this period very important for carbon cycling. We show that, under conditions of warmer winter air temperatures and greater snowfall, deeper soils can remain warm enough to sustain significantly enhanced CH4 emission. This could have large implications for future climates.
The Arctic tundra represents a vast store of carbon that may be broken down by microbial...
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