liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Spatiotemporal patterns in methane flux and gas transfer velocity at low wind speeds: Implications for upscaling studies on small lakes
University of Bern, Switzerland; University of Jyvaskyla, Finland.
Linköping University, Department of Thematic Studies, Tema Environmental Change. Linköping University, Faculty of Arts and Sciences.
University of Bern, Switzerland; University of Southampton, England.
University of Bern, Switzerland.
2016 (English)In: Journal of Geophysical Research - Biogeosciences, ISSN 2169-8953, E-ISSN 2169-8961, Vol. 121, no 6, 1456-1467 p.Article in journal (Refereed) Published
Resource type
Text
Abstract [en]

Lakes contribute significantly to the global natural emissions of methane (CH4) and carbon dioxide. However, to accurately incorporate them into the continental carbon balance more detailed surveys of lacustrine greenhouse gas emissions are needed, especially in respect to spatiotemporal variability and to how this affects the upscaling of results. We investigated CH4 flux from a small, wind-shielded lake during 10 field trips over a 14month period. We show that floating chambers may be used to calibrate the relationship between gas transfer velocity (k) and wind speed at 10m height (U-10) to the local system, in order to obtain more accurate estimates of diffusive CH4 flux than by applying general models predicting k based on U-10. We confirm earlier studies indicating strong within-lake spatial variation in this relationship and in ebullitive CH4 flux within the lake basin. However, in contrast to the pattern reported in other studies, ebullitive CH4 flux was highest in the central parts of the lake. Our results indicate positive relationships between k and U-10 at very low U-10 (0-3ms(-1)), which disagrees with earlier suggestions that this relationship may be negligible at low U-10 values. We estimate annually averaged open water CH4 emission from Lake Gerzensee to be 3.6-5.8mmolm(-2)d(-1). Our data suggest that estimates of greenhouse gas emissions from aquatic systems to the atmosphere based on the upscaling of short-term and small-scale measurements can be improved if both spatial and temporal variabilities of emissions are taken into account.

Place, publisher, year, edition, pages
AMER GEOPHYSICAL UNION , 2016. Vol. 121, no 6, 1456-1467 p.
Keyword [en]
lakes; diffusion; methane flux; piston velocity; ebullition; gas transfer velocity
National Category
Physical Geography
Identifiers
URN: urn:nbn:se:liu:diva-130667DOI: 10.1002/2016JG003346ISI: 000379965000005OAI: oai:DiVA.org:liu-130667DiVA: diva2:954152
Note

Funding Agencies|European Research Council (ERC) under the European Union/ERC [239858]; Swedish Research Council (VR)

Available from: 2016-08-20 Created: 2016-08-19 Last updated: 2016-12-12

Open Access in DiVA

fulltext(851 kB)23 downloads
File information
File name FULLTEXT01.pdfFile size 851 kBChecksum SHA-512
f60f71a2a7cee3e289bc1b66e0ae369905df7fe2e04d31ef90f234159331d37ea5c77f90c60f7fdcc836fe89ce5e38fbc14f67f14a21601cfcf06da89bd392f7
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Bastviken, David
By organisation
Tema Environmental ChangeFaculty of Arts and Sciences
In the same journal
Journal of Geophysical Research - Biogeosciences
Physical Geography

Search outside of DiVA

GoogleGoogle Scholar
Total: 23 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 78 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf