Document Detail

Contribution of winter to the annual CH4 emission from a eutrophied boreal lake.
MedLine Citation:
PMID:  12653296     Owner:  NLM     Status:  MEDLINE    
The springtime methane (CH4) emission from a small, eutrophied boreal lake was assessed during the winter ice-cover by measurement of gas ebullition and CH4 accumulation in the water column in association with the development of oxygen depletion after ice formation. The winter CH4 production was estimated to result in a loss of 3.6-7.9 g CH4 m(-2) from the lake to the atmosphere during the short period of ice melt. This could account for 22-48% of the annual CH4 emission from the pelagic zone of the lake. The contribution of winter to the annual CH4 release can be similar or even higher in seasonally ice-covered northern aquatic ecosystems than in northern terrestrial wetlands, thus winter must be considered in any studies into the aquatic CH4 emissions. The trophic state and wintertime oxygen conditions, linked to the changes in land-use in the catchments and climate, are important factors controlling the springtime lake CH4 emissions.
Jari T Huttunen; Jukka Alm; Erkki Saarijärvi; K Matti Lappalainen; Jouko Silvola; Pertti J Martikainen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Chemosphere     Volume:  50     ISSN:  0045-6535     ISO Abbreviation:  Chemosphere     Publication Date:  2003 Jan 
Date Detail:
Created Date:  2003-03-25     Completed Date:  2003-04-17     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  247-50     Citation Subset:  IM    
Department of Environmental Sciences, Bioteknia 2, University of Kuopio, P.O. Box 1627, FIN-70211 Kuopio, Finland.
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MeSH Terms
Fresh Water / chemistry*
Methane / analysis*
Oxygen / chemistry
Reg. No./Substance:
0/Ice; 74-82-8/Methane; 7782-44-7/Oxygen

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