Decadal vegetation changes in a northern peatland, greenhouse gas fluxes and net radiative forcing
Abstract Thawing permafrost in the sub‐Arctic has implications for the physical stability and biological dynamics of peatland ecosystems. This study provides an analysis of how permafrost thawing and subsequent vegetation changes in a sub‐Arctic Swedish mire have changed the net exchange of greenhou...
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crwiley:10.1111/j.1365-2486.2006.01267.x 2024-09-15T18:29:50+00:00 Decadal vegetation changes in a northern peatland, greenhouse gas fluxes and net radiative forcing JOHANSSON, TORBJÖRN MALMER, NILS CRILL, PATRICK M. FRIBORG, THOMAS ÅKERMAN, JONAS H. MASTEPANOV, MIKHAIL CHRISTENSEN, TORBEN R. 2006 http://dx.doi.org/10.1111/j.1365-2486.2006.01267.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2006.01267.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2006.01267.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 12, issue 12, page 2352-2369 ISSN 1354-1013 1365-2486 journal-article 2006 crwiley https://doi.org/10.1111/j.1365-2486.2006.01267.x 2024-08-01T04:23:46Z Abstract Thawing permafrost in the sub‐Arctic has implications for the physical stability and biological dynamics of peatland ecosystems. This study provides an analysis of how permafrost thawing and subsequent vegetation changes in a sub‐Arctic Swedish mire have changed the net exchange of greenhouse gases, carbon dioxide (CO 2 ) and CH 4 over the past three decades. Images of the mire (ca. 17 ha) and surroundings taken with film sensitive in the visible and the near infrared portion of the spectrum, [i.e. colour infrared (CIR) aerial photographs from 1970 and 2000] were used. The results show that during this period the area covered by hummock vegetation decreased by more than 11% and became replaced by wet‐growing plant communities. The overall net uptake of C in the vegetation and the release of C by heterotrophic respiration might have increased resulting in increases in both the growing season atmospheric CO 2 sink function with about 16% and the CH 4 emissions with 22%. Calculating the flux as CO 2 equivalents show that the mire in 2000 has a 47% greater radiative forcing on the atmosphere using a 100‐year time horizon. Northern peatlands in areas with thawing sporadic or discontinuous permafrost are likely to act as larger greenhouse gas sources over the growing season today than a few decades ago because of increased CH 4 emissions. Article in Journal/Newspaper permafrost Wiley Online Library Global Change Biology 12 12 2352 2369 |
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Wiley Online Library |
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English |
description |
Abstract Thawing permafrost in the sub‐Arctic has implications for the physical stability and biological dynamics of peatland ecosystems. This study provides an analysis of how permafrost thawing and subsequent vegetation changes in a sub‐Arctic Swedish mire have changed the net exchange of greenhouse gases, carbon dioxide (CO 2 ) and CH 4 over the past three decades. Images of the mire (ca. 17 ha) and surroundings taken with film sensitive in the visible and the near infrared portion of the spectrum, [i.e. colour infrared (CIR) aerial photographs from 1970 and 2000] were used. The results show that during this period the area covered by hummock vegetation decreased by more than 11% and became replaced by wet‐growing plant communities. The overall net uptake of C in the vegetation and the release of C by heterotrophic respiration might have increased resulting in increases in both the growing season atmospheric CO 2 sink function with about 16% and the CH 4 emissions with 22%. Calculating the flux as CO 2 equivalents show that the mire in 2000 has a 47% greater radiative forcing on the atmosphere using a 100‐year time horizon. Northern peatlands in areas with thawing sporadic or discontinuous permafrost are likely to act as larger greenhouse gas sources over the growing season today than a few decades ago because of increased CH 4 emissions. |
format |
Article in Journal/Newspaper |
author |
JOHANSSON, TORBJÖRN MALMER, NILS CRILL, PATRICK M. FRIBORG, THOMAS ÅKERMAN, JONAS H. MASTEPANOV, MIKHAIL CHRISTENSEN, TORBEN R. |
spellingShingle |
JOHANSSON, TORBJÖRN MALMER, NILS CRILL, PATRICK M. FRIBORG, THOMAS ÅKERMAN, JONAS H. MASTEPANOV, MIKHAIL CHRISTENSEN, TORBEN R. Decadal vegetation changes in a northern peatland, greenhouse gas fluxes and net radiative forcing |
author_facet |
JOHANSSON, TORBJÖRN MALMER, NILS CRILL, PATRICK M. FRIBORG, THOMAS ÅKERMAN, JONAS H. MASTEPANOV, MIKHAIL CHRISTENSEN, TORBEN R. |
author_sort |
JOHANSSON, TORBJÖRN |
title |
Decadal vegetation changes in a northern peatland, greenhouse gas fluxes and net radiative forcing |
title_short |
Decadal vegetation changes in a northern peatland, greenhouse gas fluxes and net radiative forcing |
title_full |
Decadal vegetation changes in a northern peatland, greenhouse gas fluxes and net radiative forcing |
title_fullStr |
Decadal vegetation changes in a northern peatland, greenhouse gas fluxes and net radiative forcing |
title_full_unstemmed |
Decadal vegetation changes in a northern peatland, greenhouse gas fluxes and net radiative forcing |
title_sort |
decadal vegetation changes in a northern peatland, greenhouse gas fluxes and net radiative forcing |
publisher |
Wiley |
publishDate |
2006 |
url |
http://dx.doi.org/10.1111/j.1365-2486.2006.01267.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2486.2006.01267.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2486.2006.01267.x |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Global Change Biology volume 12, issue 12, page 2352-2369 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2486.2006.01267.x |
container_title |
Global Change Biology |
container_volume |
12 |
container_issue |
12 |
container_start_page |
2352 |
op_container_end_page |
2369 |
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1810471289472679936 |