University of Oulu

Väisänen, M., Klaminder, J., Ylänne, H., Teuber, L., Dorrepaal, E., & Krab, E. J. (2023). Tundra cryogenic land surface processes and CO 2 –C balance in sub-Arctic alpine environment withstand winter and spring warming. Environmental Research: Climate, 2(2), 021001.

Tundra cryogenic land surface processes and CO₂-C balance in sub-Arctic alpine environment withstand winter and spring warming

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Author: Väisänen, Maria1; Klaminder, Jonatan2; Ylänne, Henni3;
Organizations: 1Ecology and genetics research unit, University of Oulu, Pentti Kaiteran street 1, Oulu, 90014, FINLAND
2Department of Ecology and Environmental Sciences, Umeå University, Vetenskapens väg 38, Abisko, SE-981 07, SWEDEN
3Lund University, Sölvegatan 37, Lund, 221 00, SWEDEN
4Department of Soil and Environment, Swedish University of Agricultural Sciences, Almas allé 8, Uppsala, Uppsala, 750 07, SWEDEN
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.1 MB)
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Language: English
Published: IOP Publishing, 2023
Publish Date: 2023-03-13


Cryogenic land surface processes (CLSPs), such as cryoturbation, are currently active in landscapes covering 25% of our planet where they dictate key functions, such as carbon (C) cycling, and maintain patterned landscape features. While CLSPs are expected to diminish in the near future due to milder winters especially in the southern parts of the Arctic, the shifts in C cycling in these landscapes may be more complex, since climate change can affect C cycling directly but also indirectly via CLSPs. Here, we study the effects of changing winter and spring climate on CLSPs and C cycling in non-sorted circles consisting of barren frost boils and their vegetated rims. We do this by measuring cryoturbation and ecosystem CO2 fluxes repeatedly in alpine subarctic tundra where temperatures during naturally snow covered period have been experimentally increased with snow-trapping fences and temperatures during winter and spring period after snowmelt have been increased with insulating fleeces. Opposite to our hypothesis, warming treatments did not decrease cryoturbation. However, winter warming via deeper snow increased ecosystem C sink during summer by decreasing ecosystem CO2 release in the frost boils and by counterbalancing the negative effects of cryoturbation on plant CO2 uptake in the vegetated rims. Our results suggest that short-term changes in winter and spring climate may not alter cryoturbation and jeopardize the tundra C sink.

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Series: Environmental research. Climate
ISSN: 2752-5295
ISSN-E: 2752-5295
ISSN-L: 2752-5295
Volume: 2
Article number: 021001
DOI: 10.1088/2752-5295/acc08b
Type of Publication: A1 Journal article – refereed
Field of Science: 1172 Environmental sciences
Copyright information: © 2023 The Author(s). Published by IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.