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High emission of carbon dioxide and methane during ice thaw in high latitude lakes
Responsible organisation
2013 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 40, no 6, p. 1123-1127Article in journal (Refereed) Published
Abstract [en]

The winter period is seldom included in the estimates of aquatic-atmospheric carbon exchange. In this study we quantified the flux of carbon dioxide (CO2) and methane (CH4) over 3 years from 12 small subarctic lakes. The lakes accumulated consistent and high amounts of CO2 and CH4 (56–97% as CO2) over the winter, resulting in a high flux during ice thaw. The CO2 flux during ice thaw increased with increasing mean depth of the lakes, while the CH4 flux was high in lakes surrounded by mires. The ice thaw period was quantitatively important to the annual gas balances of the lakes. For nine of the lakes, 11 to 55% of the annual flux occurred during thaw. For three of the lakes with an apparent net annual CO2 uptake, including the thaw period reversed the balance from sink to source. Our results suggest that the ice thaw period is critically important for the emissions of CO2 and CH4 in small lakes.

Place, publisher, year, edition, pages
2013. Vol. 40, no 6, p. 1123-1127
Keywords [en]
Carbon cycling, Biogeochemical cycles, processes, and modeling, Limnology, Permafrost, cryosphere, and high-latitude processes, Trace gases, lakes, carbon fluxes, winter
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:polar:diva-4233DOI: 10.1002/grl.50152OAI: oai:DiVA.org:polar-4233DiVA, id: diva2:1179087
Available from: 2018-01-31 Created: 2018-01-31 Last updated: 2018-01-31

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • 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