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Contemporary carbon...
Contemporary carbon accumulation in a boreal oligotrophic minerogenic mire - a significant sink after accounting for all C-fluxes
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Nilsson, Mats (author)
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Sagerfors, Joergen (author)
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Buffam, Ishi (author)
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- Laudon, Hjalmar (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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Eriksson, Tobias (author)
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Grelle, Achim (author)
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- Klemedtsson, Leif, 1953 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för växt- och miljövetenskaper,Department of Plant and Environmental Sciences
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- Weslien, Per, 1963 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för växt- och miljövetenskaper,Department of Plant and Environmental Sciences
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- Lindroth, Anders (author)
- Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science
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(creator_code:org_t)
- 2008-05-27
- 2008
- English.
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In: Global Change Biology. - : Wiley. - 1354-1013 .- 1365-2486. ; 14:10, s. 2317-2332
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Abstract
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- Based on theories of mire development and responses to a changing climate, the current role of mires as a net carbon sink has been questioned. A rigorous evaluation of the current net C-exchange in mires requires measurements of all relevant fluxes. Estimates of annual total carbon budgets in mires are still very limited. Here, we present a full carbon budget over 2 years for a boreal minerogenic oligotrophic mire in northern Sweden (64 degrees 11'N, 19 degrees 33'E). Data on the following fluxes were collected: land-atmosphere CO2 exchange (continuous Eddy covariance measurements) and CH4 exchange (static chambers during the snow free period); TOC (total organic carbon) in precipitation; loss of TOC, dissolved inorganic carbon (DIC) and CH4 through stream water runoff (continuous discharge measurements and regular C-concentration measurements). The mire constituted a net sink of 27 +/- 3.4 (+/- SD) g C m(-2) yr(-1) during 2004 and 20 +/- 3.4 g C m(-2) yr(-1) during 2005. This could be partitioned into an annual surface-atmosphere CO2 net uptake of 55 +/- 1.9 g C m(-2) yr(-1) during 2004 and 48 +/- 1.6 g C m(-2) yr(-1) during 2005. The annual NEE was further separated into a net uptake season, with an uptake of 92 g C m(-2) yr(-1) during 2004 and 86 g C m(-2) yr(-1) during 2005, and a net loss season with a loss of 37 g C m(-2) yr(-1) during 2004 and 38 g C m(-2) yr(-1) during 2005. Of the annual net CO2-C uptake, 37% and 31% was lost through runoff (with runoff TOC > DIC >> CH4) and 16% and 29% through methane emission during 2004 and 2005, respectively. This mire is still a significant C-sink, with carbon accumulation rates comparable to the long-term Holocene C-accumulation, and higher than the C-accumulation during the late Holocene in the region.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
Keyword
- peat
- NEE
- NECB
- methane
- Eddy covariance
- DOC
- boreal mire
- carbon balance
- runoff
- Sphagnum
- TOC
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Nilsson, Mats
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Sagerfors, Joerg ...
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Buffam, Ishi
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Laudon, Hjalmar
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Eriksson, Tobias
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Grelle, Achim
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show more...
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Klemedtsson, Lei ...
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Weslien, Per, 19 ...
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Lindroth, Anders
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Physical Geograp ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Meteorology and ...
- Articles in the publication
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Global Change Bi ...
- By the university
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Lund University
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University of Gothenburg
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Umeå University