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Warming response of peatland CO2 sink is sensitive to seasonality in warming trends

Helbig, M. and Zivkovic, T. and Alekseychik, P. and Aurela, M. and El-Madany, T. S. and Euskirchen, E. S. and Flanagan, L. B. and Griffis, T. J. and Hanson, P. J. and Hattakka, J. and Helfter, C. and Hirano, T. and Humphreys, E. R. and Kiely, G. and Kolka, R. K. and Laurila, T. and Leahy, P. G. and Lohila, A. and Mammarella, I. and Nilsson, Mats and Panov, A. and Parmentier, F. J. W. and Peichl, Matthias and Rinne, J. and Roman, D. T. and Sonnentag, O. and Tuittila, E. -s and Ueyama, M. and Vesala, T. and Vestin, P. and Weldon, S. and Weslien, P. and Zaehle, S. (2022). Warming response of peatland CO2 sink is sensitive to seasonality in warming trends. Nature Climate Change. 12 , 743-749
[Research article]

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Abstract

Peatlands have acted as net CO2 sinks over millennia, exerting a global climate cooling effect. Rapid warming at northern latitudes, where peatlands are abundant, can disturb their CO2 sink function. Here we show that sensitivity of peatland net CO2 exchange to warming changes in sign and magnitude across seasons, resulting in complex net CO2 sink responses. We use multiannual net CO2 exchange observations from 20 northern peatlands to show that warmer early summers are linked to increased net CO2 uptake, while warmer late summers lead to decreased net CO2 uptake. Thus, net CO2 sinks of peatlands in regions experiencing early summer warming, such as central Siberia, are more likely to persist under warmer climate conditions than are those in other regions. Our results will be useful to improve the design of future warming experiments and to better interpret large-scale trends in peatland net CO2 uptake over the coming few decades.Peatlands have historically acted as a carbon sink, but it is unclear how climate warming will affect this. The response of peatland carbon uptake to warming depends on the timing of summer warming; early warming leads to increased CO2 uptake and later warming to decreased uptake.

Authors/Creators:Helbig, M. and Zivkovic, T. and Alekseychik, P. and Aurela, M. and El-Madany, T. S. and Euskirchen, E. S. and Flanagan, L. B. and Griffis, T. J. and Hanson, P. J. and Hattakka, J. and Helfter, C. and Hirano, T. and Humphreys, E. R. and Kiely, G. and Kolka, R. K. and Laurila, T. and Leahy, P. G. and Lohila, A. and Mammarella, I. and Nilsson, Mats and Panov, A. and Parmentier, F. J. W. and Peichl, Matthias and Rinne, J. and Roman, D. T. and Sonnentag, O. and Tuittila, E. -s and Ueyama, M. and Vesala, T. and Vestin, P. and Weldon, S. and Weslien, P. and Zaehle, S.
Title:Warming response of peatland CO2 sink is sensitive to seasonality in warming trends
Series Name/Journal:Nature Climate Change
Year of publishing :2022
Volume:12
Page range:743-749
Number of Pages:7
Publisher:NATURE PORTFOLIO
ISSN:1758-678X
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Meteorology and Atmospheric Sciences
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Climate Research
URN:NBN:urn:nbn:se:slu:epsilon-p-118586
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-118586
Additional ID:
Type of IDID
DOI10.1038/s41558-022-01428-z
Web of Science (WoS)000834576700003
ID Code:28681
Faculty:S - Faculty of Forest Sciences
Department:(S) > Dept. of Forest Ecology and Management
Deposited By: SLUpub Connector
Deposited On:31 Aug 2022 07:34
Metadata Last Modified:31 Aug 2022 07:41

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