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Methane emissions from lakes: Dependence of lake characteristics, two regional assessments, and a global estimate
Linköping University, Faculty of Educational Sciences. Linköping University, Department of Social and Welfare Studies, Learning, Aesthetics, Natural science.
2004 (English)In: Global Biogeochemical Cycles, ISSN 0886-6236, Vol. 18, no 4Article in journal (Refereed) Published
Abstract [en]

[ 1] Lake sediments are "hot spots'' of methane production in the landscape. However, regional and global lake methane emissions, contributing to the greenhouse effect, are poorly known. We developed predictions of methane emissions from easily measured lake characteristics based on measurements for 11 North American and 13 Swedish lakes, and literature values from 49 lakes. Results suggest that open water methane emission can be predicted from variables such as lake area, water depth, concentrations of total phosphorus, dissolved organic carbon, and methane, and the anoxic lake volume fraction. Using these relations, we provide regional estimates from lakes in Sweden and the upper midwest of the United States. Considering both open water and plant-mediated fluxes, we estimate global emissions as 8 - 48 Tg CH4 yr(-1) (6 - 16% of total natural methane emissions and greater than oceanic emission), indicating that lakes should be included as a significant source in global methane budgets.

Place, publisher, year, edition, pages
2004. Vol. 18, no 4
Keyword [en]
methane emission, lakes, greenhouse gases, ebullition, regional, global
National Category
Social Sciences
URN: urn:nbn:se:liu:diva-46170DOI: 10.1029/2004GB002238,OAI: diva2:267066
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-12

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Bastviken, David
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