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Is the subarctic landscape still a carbon sink? Evidence from a detailed catchment balance

Author:
  • Erik J. Lundin
  • Jonatan Klaminder
  • Reiner Giesler
  • Andreas Persson
  • David Olefeldt
  • Michal Heliasz
  • Torben R. Christensen
  • Jan Karlsson
Publishing year: 2016-03-16
Language: English
Pages: 1988-1995
Publication/Series: Geophysical Research Letters
Volume: 43
Issue: 5
Document type: Journal article
Publisher: American Geophysical Union (AGU)

Abstract english

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 (-11 ± 20 g C m-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.

Keywords

  • Climate Research
  • aquatic ecosystems
  • carbon balance
  • sink
  • source
  • subarctic
  • terrestrial ecosystems

Other

Published
  • ISSN: 0094-8276
E-mail: michal [dot] heliasz [at] cec [dot] lu [dot] se

Research engineer

Centre for Environmental and Climate Research (CEC)

+46 70 742 13 67

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Research engineer

Dept of Physical Geography and Ecosystem Science

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Research engineer

ICOS Sweden

+46 70 742 13 67

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Department of Physical Geography and Ecosystem Science
Lund University
Sölvegatan 12
S-223 62 Lund
Sweden

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