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Biased sampling of methane release from northern lakes: A problem for extrapolation
Stockholms universitet, Institutionen för geologiska vetenskaper.
Stockholms universitet, Institutionen för geologiska vetenskaper.
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2016 (Engelska)Ingår i: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 43, nr 3, s. 1256-1262Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

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.

Ort, förlag, år, upplaga, sidor
2016. Vol. 43, nr 3, s. 1256-1262
Nyckelord [en]
northern lakes, methane, sampling bias, ebullition, diffusion, subarctic
Nationell ämneskategori
Geovetenskap och miljövetenskap
Forskningsämne
geokemi
Identifikatorer
URN: urn:nbn:se:polar:diva-3442DOI: 10.1002/2015GL066501ISI: 000372056600039OAI: oai:DiVA.org:polar-3442DiVA, id: diva2:1079203
Forskningsfinansiär
Vetenskapsrådet, 2007–4547]Tillgänglig från: 2016-02-16 Skapad: 2017-03-07 Senast uppdaterad: 2017-11-29

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