Articles | Volume 17, issue 22
Biogeosciences, 17, 5861–5882, 2020
https://doi.org/10.5194/bg-17-5861-2020
Biogeosciences, 17, 5861–5882, 2020
https://doi.org/10.5194/bg-17-5861-2020
Research article
 | Highlight paper
27 Nov 2020
Research article  | Highlight paper | 27 Nov 2020

Investigating the sensitivity of soil heterotrophic respiration to recent snow cover changes in Alaska using a satellite-based permafrost carbon model

Yonghong Yi et al.

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Cited articles

Arndt, K. A., Oechel, W. C., Goodrich, J. P., Bailey, B. A., Kalhori, A., Hashemi, J., Sweeney, C., and Zona, D.: Sensitivity of Methane Emissions to Later Soil Freezing in Arctic Tundra Ecosystems, J. Geophys. Res.-Biogeo., 124, 2595–2609, https://doi.org/10.1029/2019JG005242, 2019. 
Aurela, M., Laurila, T., and Tuovinen, J.: The timing of snow melt controls the annual CO2 balance in a subarctic fen, Geophys. Res. Lett., 31, L16119, https://doi.org/10.1029/2004GL020315, 2004. 
Bintanja, R. and Andry, O.: Towards a rain-dominated Arctic, Nat. Clim. Change, 7, 263–267, https://doi.org/10.1038/nclimate3240, 2017. 
Bjerke, J. W., Tømmervik, H., Zielke, M., and Jørgensen, M.: Impacts of snow season on ground-ice accumulation, soil frost and primary productivity in a grassland of sub-Arctic Norway, Environ. Res. Lett., 10, 095007, https://doi.org/10.1088/1748-9326/10/9/095007, 2015. 
Bormann, K. J., Brown, R. D., Derksen, C., and Painter, T. H.: Estimating snow-cover trends from space, Nat. Clim. Change, 8, 924–928, https://doi.org/10.1038/s41558-018-0318-3, 2018. 
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Short summary
We developed a 1 km satellite-data-driven permafrost carbon model to evaluate soil respiration sensitivity to recent snow cover changes in Alaska. Results show earlier snowmelt enhances growing-season soil respiration and reduces annual carbon uptake, while early cold-season soil respiration is linked to the number of snow-free days after the land surface freezes. Our results also show nonnegligible influences of subgrid variability in surface conditions on model-simulated CO2 seasonal cycles.
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