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Is the subarctic landscape still a carbon sink? Evidence from a detailed catchment balance
Stockholm University, Faculty of Science, Department of Environmental Science and Analytical Chemistry. Umeå University, Sweden.
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Number of Authors: 8
2016 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 43, no 5, 1988-1995 p.Article in journal (Refereed) Published
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
2016. Vol. 43, no 5, 1988-1995 p.
Keyword [en]
carbon balance, subarctic, sink, source, aquatic ecosystems, terrestrial ecosystems
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-129688DOI: 10.1002/2015GL066970ISI: 000373109800025OAI: oai:DiVA.org:su-129688DiVA: diva2:929759
Available from: 2016-05-19 Created: 2016-04-27 Last updated: 2016-07-06Bibliographically approved

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Lundin, Erik J.
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