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Long-term pCO(2) trends in Adirondack Lakes
Umea Univ, Dept Ecol & Environm Sci, Umea, Sweden..
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Limnology.
2016 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 43, no 10, 5109-5115 p.Article in journal (Refereed) PublishedText
Abstract [en]

Lakes are globally significant sources of CO2 to the atmosphere. However, there are few temporally resolved records of lake CO2 concentrations and long-term patterns are poorly characterized. We evaluated annual trends in the partial pressure of CO2 (pCO(2)) based on chemical measurements from 31 Adirondack Lakes taken monthly over an 18 year period. All lakes were supersaturated with CO2 and were sources of CO2 to the atmosphere. There were significant pCO2 trends in 29% of lakes. The median magnitude of significant positive trends was 32.1 mu atm yr(-1). Overall, 52% of lakes had pCO(2) trends greater than those reported for the atmosphere and ocean. Significant trends in lake pCO(2) were attributable to regional recovery from acid deposition and changing patterns of ice cover. These results illustrate that lake pCO(2) can respond rapidly to environmental change, but the lack of significant trend in 71% of lakes indicates substantial lake-to-lake variation in magnitude of response.

Place, publisher, year, edition, pages
2016. Vol. 43, no 10, 5109-5115 p.
National Category
Oceanography, Hydrology, Water Resources Geochemistry
URN: urn:nbn:se:uu:diva-299792DOI: 10.1002/2016GL068939ISI: 000378347500055OAI: oai:DiVA.org:uu-299792DiVA: diva2:950157
Carl Tryggers foundation
Available from: 2016-07-28 Created: 2016-07-27 Last updated: 2016-07-28Bibliographically approved

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