Articles | Volume 20, issue 24
https://doi.org/10.5194/bg-20-5087-2023
https://doi.org/10.5194/bg-20-5087-2023
Research article
 | 
20 Dec 2023
Research article |  | 20 Dec 2023

Environmental controls of winter soil carbon dioxide fluxes in boreal and tundra environments

Alex Mavrovic, Oliver Sonnentag, Juha Lemmetyinen, Carolina Voigt, Nick Rutter, Paul Mann, Jean-Daniel Sylvain, and Alexandre Roy

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Cited articles

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We present an analysis of soil CO2 emissions in boreal and tundra regions during the non-growing season. We show that when the soil is completely frozen, soil temperature is the main control on CO2 emissions. When the soil is around the freezing point, with a mix of liquid water and ice, the liquid water content is the main control on CO2 emissions. This study highlights that the vegetation–snow–soil interactions must be considered to understand soil CO2 emissions during the non-growing season.
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