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Upscaling carbon dioxide emissions from lakes
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. Department of Environmental Sciences, University of Virginia, Charlottesville, Virginia, USA. (Arcum)
Department of Environmental Sciences, University of Virginia, Charlottesville, Virginia, USA.
Department of Ecology and Evolutionary Biology, Princeton University, Princeton, New Jersey, USA. (Arcum)
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. (Arcum)
2014 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 41, no 21, 7555-7559 p.Article in journal (Refereed) Published
Abstract [en]

Quantifying CO2 fluxes from lakes to the atmosphere is important for balancing regional and global-scale carbon budgets. CO2 emissions are estimated through statistical upscaling procedures that aggregate data from a large number of lakes. However, aggregation can bias flux estimates if the physical and chemical factors determining CO2 exchange between water and the atmosphere are not independent. We evaluated the magnitude of aggregation biases with moment expansions and pCO(2) data from 5140 Swedish lakes. The direction of the aggregation bias depends on lake size; mean flux was overestimated by 4% for small lakes (0.01-0.1 km(2)) but underestimated by 13% for large lakes (100-1000 km(2)). Simple covariance-based correction factors were generated to adjust for upscaling biases. These correction factors represent an easily interpretable and implemented approach to improving the accuracy of regional and global estimates of lake CO2 emissions.

Place, publisher, year, edition, pages
2014. Vol. 41, no 21, 7555-7559 p.
National Category
Climate Research
Identifiers
URN: urn:nbn:se:umu:diva-98409DOI: 10.1002/2014GL061824ISI: 000345518300019Scopus ID: 2-s2.0-84912139147OAI: oai:DiVA.org:umu-98409DiVA: diva2:782643
Available from: 2015-01-22 Created: 2015-01-22 Last updated: 2017-12-05Bibliographically approved

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Seekell, David A.Karlsson, Jan

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