Interdecadal changes in CO 2 and CH 4 fluxes of a subarctic mire:Stordalen revisited after 20 years
The first subarctic wetland CO 2 and CH 4 flux measurements were made at Stordalen in the beginning of the 1970s in connection with the IBP study. A return to this area in 1994-95 offered a unique opportunity to study possible interdecadal changes in northern wetland CO 2 and CH 4 emissions. Measure...
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1999
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ftuniaarhuspubl:oai:pure.atira.dk:publications/36bc43eb-06da-4a92-b84f-15e9015789d0 2023-05-15T17:57:48+02:00 Interdecadal changes in CO 2 and CH 4 fluxes of a subarctic mire:Stordalen revisited after 20 years Christensen, T. R. Johansson, E. Öquist, M. 1999-01-01 https://pure.au.dk/portal/da/publications/interdecadal-changes-in-co2-and-ch4-fluxes-of-a-subarctic-mire(36bc43eb-06da-4a92-b84f-15e9015789d0).html https://doi.org/10.2307/3546788 http://www.scopus.com/inward/record.url?scp=0032939731&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Christensen , T R , Johansson , E & Öquist , M 1999 , ' Interdecadal changes in CO 2 and CH 4 fluxes of a subarctic mire : Stordalen revisited after 20 years ' , Oikos , vol. 85 , no. 1 , pp. 22-30 . https://doi.org/10.2307/3546788 article 1999 ftuniaarhuspubl https://doi.org/10.2307/3546788 2022-11-16T23:53:54Z The first subarctic wetland CO 2 and CH 4 flux measurements were made at Stordalen in the beginning of the 1970s in connection with the IBP study. A return to this area in 1994-95 offered a unique opportunity to study possible interdecadal changes in northern wetland CO 2 and CH 4 emissions. Measurements of CO 2 and CH 4 fluxes were carried out in similar habitats as those investigated in 1974. The mire distribution of wet minerotrophic areas relative to the elevated ombrotrophic areas had changed dramatically over the twenty years. There were no significant differences between the CH 4 -flux in 1974, 1994, and 1995. However, the CO 2 fluxes were significantly higher in 1995 than in 1974. Since differences in climatic conditions gave no cause for such a change it suggests a possible increase in decomposition rate to be due to other factors. We suggest changes in vegetation composition, altered mineralization pathways and disintegration of permafrost as causes for the interdecadal increase in decomposition rates. Article in Journal/Newspaper permafrost Subarctic Aarhus University: Research Stordalen ENVELOPE(7.337,7.337,62.510,62.510) Oikos 85 1 22 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
description |
The first subarctic wetland CO 2 and CH 4 flux measurements were made at Stordalen in the beginning of the 1970s in connection with the IBP study. A return to this area in 1994-95 offered a unique opportunity to study possible interdecadal changes in northern wetland CO 2 and CH 4 emissions. Measurements of CO 2 and CH 4 fluxes were carried out in similar habitats as those investigated in 1974. The mire distribution of wet minerotrophic areas relative to the elevated ombrotrophic areas had changed dramatically over the twenty years. There were no significant differences between the CH 4 -flux in 1974, 1994, and 1995. However, the CO 2 fluxes were significantly higher in 1995 than in 1974. Since differences in climatic conditions gave no cause for such a change it suggests a possible increase in decomposition rate to be due to other factors. We suggest changes in vegetation composition, altered mineralization pathways and disintegration of permafrost as causes for the interdecadal increase in decomposition rates. |
format |
Article in Journal/Newspaper |
author |
Christensen, T. R. Johansson, E. Öquist, M. |
spellingShingle |
Christensen, T. R. Johansson, E. Öquist, M. Interdecadal changes in CO 2 and CH 4 fluxes of a subarctic mire:Stordalen revisited after 20 years |
author_facet |
Christensen, T. R. Johansson, E. Öquist, M. |
author_sort |
Christensen, T. R. |
title |
Interdecadal changes in CO 2 and CH 4 fluxes of a subarctic mire:Stordalen revisited after 20 years |
title_short |
Interdecadal changes in CO 2 and CH 4 fluxes of a subarctic mire:Stordalen revisited after 20 years |
title_full |
Interdecadal changes in CO 2 and CH 4 fluxes of a subarctic mire:Stordalen revisited after 20 years |
title_fullStr |
Interdecadal changes in CO 2 and CH 4 fluxes of a subarctic mire:Stordalen revisited after 20 years |
title_full_unstemmed |
Interdecadal changes in CO 2 and CH 4 fluxes of a subarctic mire:Stordalen revisited after 20 years |
title_sort |
interdecadal changes in co 2 and ch 4 fluxes of a subarctic mire:stordalen revisited after 20 years |
publishDate |
1999 |
url |
https://pure.au.dk/portal/da/publications/interdecadal-changes-in-co2-and-ch4-fluxes-of-a-subarctic-mire(36bc43eb-06da-4a92-b84f-15e9015789d0).html https://doi.org/10.2307/3546788 http://www.scopus.com/inward/record.url?scp=0032939731&partnerID=8YFLogxK |
long_lat |
ENVELOPE(7.337,7.337,62.510,62.510) |
geographic |
Stordalen |
geographic_facet |
Stordalen |
genre |
permafrost Subarctic |
genre_facet |
permafrost Subarctic |
op_source |
Christensen , T R , Johansson , E & Öquist , M 1999 , ' Interdecadal changes in CO 2 and CH 4 fluxes of a subarctic mire : Stordalen revisited after 20 years ' , Oikos , vol. 85 , no. 1 , pp. 22-30 . https://doi.org/10.2307/3546788 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.2307/3546788 |
container_title |
Oikos |
container_volume |
85 |
container_issue |
1 |
container_start_page |
22 |
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1766166293509046272 |