Advanced

Quantifying the relative importance of lake emissions in the carbon budget of a subarctic catchment

Karlsson, Jan; Christensen, Torben LU ; Crill, Patrick; Forster, Johannes; Hammarlund, Dan LU ; Jackowicz-Korczynski, Marcin LU ; Kokfelt, Ulla LU ; Roehm, Charlotte and Rosen, Peter (2010) In Journal of Geophysical Research 115.
Abstract
Climate change and thawing of permafrost will likely result in increased decomposition of terrestrial organic carbon and subsequent carbon emissions to the atmosphere from terrestrial and aquatic systems. The quantitative importance of mineralization of terrestrial organic carbon in lakes in relation to terrestrial carbon fluxes is poorly understood and a serious drawback for the understanding of carbon budgets. We studied a subarctic lake in an area of discontinuous permafrost to assess the quantitative importance of lake carbon emission for the catchment carbon balance. Estimates of net ecosystem production and stable carbon-isotope composition of dissolved organic carbon in the lake water suggest substantial input and respiration of... (More)
Climate change and thawing of permafrost will likely result in increased decomposition of terrestrial organic carbon and subsequent carbon emissions to the atmosphere from terrestrial and aquatic systems. The quantitative importance of mineralization of terrestrial organic carbon in lakes in relation to terrestrial carbon fluxes is poorly understood and a serious drawback for the understanding of carbon budgets. We studied a subarctic lake in an area of discontinuous permafrost to assess the quantitative importance of lake carbon emission for the catchment carbon balance. Estimates of net ecosystem production and stable carbon-isotope composition of dissolved organic carbon in the lake water suggest substantial input and respiration of terrestrial organic carbon in the lake. The lake was a net source of CO2 and CH4 to the atmosphere at ice breakup in spring and during the whole ice-free period. The carbon emission from the lake was similar in magnitude to the terrestrial net release of carbon to the atmosphere. The results indicate that lakes are important sources of catchment carbon emission, potentially increasing the positive feedback from permafrost thawing on global warming. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Geophysical Research
volume
115
publisher
American Geophysical Union
external identifiers
  • wos:000280047700007
  • scopus:77955632226
ISSN
2156-2202
DOI
10.1029/2010JG001305
project
MERGE
BECC
language
English
LU publication?
yes
id
09390807-c96a-418e-8aba-0beb43ba2ff2 (old id 1654925)
date added to LUP
2010-08-25 15:44:31
date last changed
2018-07-01 03:03:15
@article{09390807-c96a-418e-8aba-0beb43ba2ff2,
  abstract     = {Climate change and thawing of permafrost will likely result in increased decomposition of terrestrial organic carbon and subsequent carbon emissions to the atmosphere from terrestrial and aquatic systems. The quantitative importance of mineralization of terrestrial organic carbon in lakes in relation to terrestrial carbon fluxes is poorly understood and a serious drawback for the understanding of carbon budgets. We studied a subarctic lake in an area of discontinuous permafrost to assess the quantitative importance of lake carbon emission for the catchment carbon balance. Estimates of net ecosystem production and stable carbon-isotope composition of dissolved organic carbon in the lake water suggest substantial input and respiration of terrestrial organic carbon in the lake. The lake was a net source of CO2 and CH4 to the atmosphere at ice breakup in spring and during the whole ice-free period. The carbon emission from the lake was similar in magnitude to the terrestrial net release of carbon to the atmosphere. The results indicate that lakes are important sources of catchment carbon emission, potentially increasing the positive feedback from permafrost thawing on global warming.},
  author       = {Karlsson, Jan and Christensen, Torben and Crill, Patrick and Forster, Johannes and Hammarlund, Dan and Jackowicz-Korczynski, Marcin and Kokfelt, Ulla and Roehm, Charlotte and Rosen, Peter},
  issn         = {2156-2202},
  language     = {eng},
  publisher    = {American Geophysical Union},
  series       = {Journal of Geophysical Research},
  title        = {Quantifying the relative importance of lake emissions in the carbon budget of a subarctic catchment},
  url          = {http://dx.doi.org/10.1029/2010JG001305},
  volume       = {115},
  year         = {2010},
}