Assessing effects of permafrost thaw on C fluxes based on multiyear modeling across a permafrost thaw gradient at Stordalen, Sweden
Northern peatlands in permafrost regions contain a large amount of organic carbon (C) in the soil. Climate warming and associated permafrost degradation are expected to have significant impacts on the C balance of these ecosystems, but the magnitude is uncertain. We incorporated a permafrost model,...
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Copernicus Publications
2014
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00019112 2023-05-15T17:55:19+02:00 Assessing effects of permafrost thaw on C fluxes based on multiyear modeling across a permafrost thaw gradient at Stordalen, Sweden Deng, J. Li, C. Frolking, S. Zhang, Y. Bäckstrand, K. Crill, P. 2014-09 electronic https://doi.org/10.5194/bg-11-4753-2014 https://noa.gwlb.de/receive/cop_mods_00019112 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00019067/bg-11-4753-2014.pdf https://bg.copernicus.org/articles/11/4753/2014/bg-11-4753-2014.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-11-4753-2014 https://noa.gwlb.de/receive/cop_mods_00019112 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00019067/bg-11-4753-2014.pdf https://bg.copernicus.org/articles/11/4753/2014/bg-11-4753-2014.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2014 ftnonlinearchiv https://doi.org/10.5194/bg-11-4753-2014 2022-02-08T22:52:48Z Northern peatlands in permafrost regions contain a large amount of organic carbon (C) in the soil. Climate warming and associated permafrost degradation are expected to have significant impacts on the C balance of these ecosystems, but the magnitude is uncertain. We incorporated a permafrost model, Northern Ecosystem Soil Temperature (NEST), into a biogeochemical model, DeNitrification-DeComposition (DNDC), to model C dynamics in high-latitude peatland ecosystems. The enhanced model was applied to assess effects of permafrost thaw on C fluxes of a subarctic peatland at Stordalen, Sweden. DNDC simulated soil freeze–thaw dynamics, net ecosystem exchange of CO2 (NEE), and CH4 fluxes across three typical land cover types, which represent a gradient in the process of ongoing permafrost thaw at Stordalen. Model results were compared with multiyear field measurements, and the validation indicates that DNDC was able to simulate observed differences in seasonal soil thaw, NEE, and CH4 fluxes across the three land cover types. Consistent with the results from field studies, the modeled C fluxes across the permafrost thaw gradient demonstrate that permafrost thaw and the associated changes in soil hydrology and vegetation not only increase net uptake of C from the atmosphere but also increase the annual to decadal radiative forcing impacts on climate due to increased CH4 emissions. This study indicates the potential of utilizing biogeochemical models, such as DNDC, to predict the soil thermal regime in permafrost areas and to investigate impacts of permafrost thaw on ecosystem C fluxes after incorporating a permafrost component into the model framework. Article in Journal/Newspaper permafrost Subarctic Niedersächsisches Online-Archiv NOA Stordalen ENVELOPE(7.337,7.337,62.510,62.510) Biogeosciences 11 17 4753 4770 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Deng, J. Li, C. Frolking, S. Zhang, Y. Bäckstrand, K. Crill, P. Assessing effects of permafrost thaw on C fluxes based on multiyear modeling across a permafrost thaw gradient at Stordalen, Sweden |
topic_facet |
article Verlagsveröffentlichung |
description |
Northern peatlands in permafrost regions contain a large amount of organic carbon (C) in the soil. Climate warming and associated permafrost degradation are expected to have significant impacts on the C balance of these ecosystems, but the magnitude is uncertain. We incorporated a permafrost model, Northern Ecosystem Soil Temperature (NEST), into a biogeochemical model, DeNitrification-DeComposition (DNDC), to model C dynamics in high-latitude peatland ecosystems. The enhanced model was applied to assess effects of permafrost thaw on C fluxes of a subarctic peatland at Stordalen, Sweden. DNDC simulated soil freeze–thaw dynamics, net ecosystem exchange of CO2 (NEE), and CH4 fluxes across three typical land cover types, which represent a gradient in the process of ongoing permafrost thaw at Stordalen. Model results were compared with multiyear field measurements, and the validation indicates that DNDC was able to simulate observed differences in seasonal soil thaw, NEE, and CH4 fluxes across the three land cover types. Consistent with the results from field studies, the modeled C fluxes across the permafrost thaw gradient demonstrate that permafrost thaw and the associated changes in soil hydrology and vegetation not only increase net uptake of C from the atmosphere but also increase the annual to decadal radiative forcing impacts on climate due to increased CH4 emissions. This study indicates the potential of utilizing biogeochemical models, such as DNDC, to predict the soil thermal regime in permafrost areas and to investigate impacts of permafrost thaw on ecosystem C fluxes after incorporating a permafrost component into the model framework. |
format |
Article in Journal/Newspaper |
author |
Deng, J. Li, C. Frolking, S. Zhang, Y. Bäckstrand, K. Crill, P. |
author_facet |
Deng, J. Li, C. Frolking, S. Zhang, Y. Bäckstrand, K. Crill, P. |
author_sort |
Deng, J. |
title |
Assessing effects of permafrost thaw on C fluxes based on multiyear modeling across a permafrost thaw gradient at Stordalen, Sweden |
title_short |
Assessing effects of permafrost thaw on C fluxes based on multiyear modeling across a permafrost thaw gradient at Stordalen, Sweden |
title_full |
Assessing effects of permafrost thaw on C fluxes based on multiyear modeling across a permafrost thaw gradient at Stordalen, Sweden |
title_fullStr |
Assessing effects of permafrost thaw on C fluxes based on multiyear modeling across a permafrost thaw gradient at Stordalen, Sweden |
title_full_unstemmed |
Assessing effects of permafrost thaw on C fluxes based on multiyear modeling across a permafrost thaw gradient at Stordalen, Sweden |
title_sort |
assessing effects of permafrost thaw on c fluxes based on multiyear modeling across a permafrost thaw gradient at stordalen, sweden |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/bg-11-4753-2014 https://noa.gwlb.de/receive/cop_mods_00019112 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00019067/bg-11-4753-2014.pdf https://bg.copernicus.org/articles/11/4753/2014/bg-11-4753-2014.pdf |
long_lat |
ENVELOPE(7.337,7.337,62.510,62.510) |
geographic |
Stordalen |
geographic_facet |
Stordalen |
genre |
permafrost Subarctic |
genre_facet |
permafrost Subarctic |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-11-4753-2014 https://noa.gwlb.de/receive/cop_mods_00019112 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00019067/bg-11-4753-2014.pdf https://bg.copernicus.org/articles/11/4753/2014/bg-11-4753-2014.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-11-4753-2014 |
container_title |
Biogeosciences |
container_volume |
11 |
container_issue |
17 |
container_start_page |
4753 |
op_container_end_page |
4770 |
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1766163233755889664 |