WFRF:(Wik Martin)
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Biased sampling of methane release from northern lakes : A problem for extrapolation
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- Wik, Martin (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper,Stockholm University, Sweden
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- Thornton, Brett F. (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper,Stockholm University, Sweden
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- Bastviken, David (author)
- Linköpings universitet,Tema Miljöförändring,Filosofiska fakulteten
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- AMER GEOPHYSICAL UNION, 2016
- 2016
- English.
- In: Geophysical Research Letters. - : AMER GEOPHYSICAL UNION. - 0094-8276 .- 1944-8007. ; 43:3, s. 1256-1262
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Methane emissions from lakes are widely thought to be highly irregular and difficult to quantify with anything other than numerous distributed measurement stations and long-term sampling campaigns. In spite of this, a large majority of the study sites north of 50°N have been measured over surprisingly short time periods of only one to a few days. Using long-term data from three intensively studied small subarctic lakes, we recommend that measurements of diffusive methane flux and ebullition should be made over at least 11 and 39 days scattered throughout the ice-free season using depth-stratified sampling at 3 and 11 or more locations, respectively. We further show that low temporal and spatial resolutions are unlikely to cause overestimates. Therefore, we argue that most sites measured previously are likely underestimated in terms of emission potential. Avoiding these biases seen in much of the contemporary data is crucial to further constrain large-scale methane emissions from northern lakes and ponds.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Keyword
- northern lakes
- methane
- sampling bias
- ebullition
- diffusion
- subarctic
- geokemi
- Geochemistry
Publication and Content Type
- ref (subject category)
- art (subject category)
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