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Large lakes dominate CO2 evasion from lakes in an arctic catchment
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.ORCID iD: 0000-0001-7853-2531
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.ORCID iD: 0000-0002-6381-4509
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.ORCID iD: 0000-0002-3785-8305
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. Division of Water Resources Engineering, Faculty of Engineering, Lund University, Lund, Sweden.
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2017 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 44, no 24, p. 12254-12261Article in journal (Refereed) Published
Abstract [en]

CO2 evasion from freshwater lakes is an important component of the carbon cycle. However, the relative contribution from different lake sizes may vary, since several parameters underlying CO2 flux are size dependent. Here we estimated the annual lake CO2 evasion from a catchment in northern Sweden encompassing about 30,000 differently sized lakes. We show that areal CO2 fluxes decreased rapidly with lake size, but this was counteracted by the greater overall coverage of larger lakes. As a result, total efflux increased with lake size and the single largest lake in the catchment dominated the CO2 evasion (53% of all CO2 evaded). By contrast, the contribution from the smallest ponds (about 27,000) was minor (<6%). Our results emphasize the importance of accounting for both CO2 flux rates and areal contribution of various sized lakes in assessments of CO2 evasion at the landscape scale.

Place, publisher, year, edition, pages
American Geophysical Union (AGU), 2017. Vol. 44, no 24, p. 12254-12261
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Geophysics Oceanography, Hydrology and Water Resources
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URN: urn:nbn:se:umu:diva-144858DOI: 10.1002/2017GL076146ISI: 000422954700049OAI: oai:DiVA.org:umu-144858DiVA, id: diva2:1184939
Available from: 2018-02-22 Created: 2018-02-22 Last updated: 2018-06-09Bibliographically approved

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Rocher-Ros, GerardGiesler, ReinerLundin, ErikJonsson, AndersKarlsson, Jan

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CiteExportLink to record
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