Atmospheric methane levels increased over geological formations in Northern Siberia following a heat wave in 2020, suggesting that permafrost thaw releases methane from reservoirs.
Image credit: Wikimedia Commons.
Edited by Kenneth Wachter, University of California, Berkeley, CA, and approved April 4, 2012 (received for review April 19, 2011)
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- Published in issue May 29, 2012.
- Published first May 14, 2012.
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- aCentre for Health Equity Studies, Stockholm University and Karolinska Institutet, and
- dSwedish Institute for Social Research, Stockholm University, 106 91 Stockholm, Sweden;
- bDepartment of Public Health Sciences, Karolinska Institutet, 171 77 Stockholm, Sweden; and
- cSwedish National Institute of Public Health, 831 40 Östersund, Sweden
Edited by Kenneth Wachter, University of California, Berkeley, CA, and approved April 4, 2012 (received for review April 19, 2011)
Footnotes
↵1A.C.J.L. and J.T. contributed equally to this work.
- ↵2To whom correspondence should be addressed. E-mail: anton.lager{at}chess.su.se.
Author contributions: A.C.J.L. and J.T. designed research, performed research, contributed analytic tools, analyzed data, and wrote the paper.
The authors declare no conflict of interest.
This article is a PNAS Direct Submission.
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