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Is the subarctic landscape still a carbon sink?: Evidence from a detailed catchment balance
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. Department of Environmental Science and Analytical Chemistry (ACES), Stockholm University, Stockholm, Sweden. (Climate Impacts Research Centre)
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. (Climate Impacts Research Centre)
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. (Climate Impacts Research Centre)
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2016 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 43, no 5, 1988-1995 p.Article in journal (Refereed) PublishedText
Abstract [en]

Climate warming raises the question whether high-latitude landscape still function as net carbon (C) sinks. By compiling an integrated C balance for an intensely studied subarctic catchment, we show that this catchment's C balance is not likely to be a strong current sink of C, a commonly held assumption. In fact, it is more plausible (71% probability) that the studied catchment functions as a C source (-1120gCm(-2)yr(-1)). Analyses of individual fluxes indicate that soil and aquatic C losses offset C sequestering in other landscape components (e.g., peatlands and aboveground forest biomass). Our results stress the importance of fully integrated catchment C balance estimates and highlight the importance of upland soils and their interaction with the aquatic network for the catchment C balance.

Place, publisher, year, edition, pages
American Geophysical Union (AGU), 2016. Vol. 43, no 5, 1988-1995 p.
Keyword [en]
carbon balance, subarctic, sink, source, aquatic ecosystems, terrestrial ecosystems
National Category
Geology Environmental Sciences
Identifiers
URN: urn:nbn:se:umu:diva-119659DOI: 10.1002/2015GL066970ISI: 000373109800025OAI: oai:DiVA.org:umu-119659DiVA: diva2:925116
Available from: 2016-04-29 Created: 2016-04-25 Last updated: 2016-04-29Bibliographically approved

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Lundin, Erik JKlaminder, JonatanGiesler, ReinerKarlsson, Jan
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