Aquatic Sciences Meeting, Albuquerque 2001

PC10 Ecological Fluxes: Organisms, Atmospheres, Oceans, Lakes, and Rivers

Date: Wednesday, February 14, 2001

Location: Southwest Hall

Aronsen, G, , University of Umeå, Umeå, Sweden, grete.aronsen@eg.umu.se

Bergström, A, K, University of Umeå, Umeå, Sweden, ann-kristin.bergstrom@eg.umu.se

Sobek, S, , University of Uppsala, Uppsala, Sweden, sebastian.sobek@ebc.uu.se

Jansson, M, , University of Umeå, Umeå, Sweden, mats.jansson@eg.umu.se

Tranvik, L, J, University of Uppsala, Uppsala, Sweden, lars.tranvik@ebc.uu.se

Carbon dioxide emissions from unproductive lakes and hydroelectric reservoirs in Sweden

Fortyfour lakes along a climatic gradient in Sweden (northwest to southeast) where sampled and analysed for CO2 concentration in surface water, dissolved organic carbon (DOC) and other chemical parameters. Most lakes were oversaturated with CO2, and a strong correlation was found between CO2 concentration in surface waters and DOC. No clear difference could be found along the climatic gradient, apart from that CO2 concentrations in the southern part were lower than in lakes in the northern areas at comparable DOC concentrations. Carbon dioxide was also measured in large hydroelectric reservoirs in a regulated river and in lakes in an unregulated river in northern Sweden. No differences in CO2 concentrations were found, but CO2 emissions from the regulated river are probably higher than from the unregulated river due to the large total surface of reservoirs compared to natural lakes.

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Aquatic Sciences Meeting, Albuquerque 2001

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