Annual CO2 budget and seasonal CO2 exchange signals at a high Arctic permafrost site on Spitsbergen, Svalbard archipelago
The annual variability of CO 2 exchange in most ecosystems is primarily driven by the activities of plants and soil microorganisms. However, little is known about the carbon balance and its controlling factors outside the growing season in Arctic regions dominated by soil freeze/thaw processes, long...
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Online Access: | https://doi.org/10.5194/bg-11-6307-2014 https://www.biogeosciences.net/11/6307/2014/ |
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ftcopernicus:oai:publications.copernicus.org:bg23652 2023-05-15T14:51:07+02:00 Annual CO2 budget and seasonal CO2 exchange signals at a high Arctic permafrost site on Spitsbergen, Svalbard archipelago Lüers, J. Westermann, S. Piel, K. Boike, J. 2018-09-27 info:eu-repo/semantics/application/pdf https://doi.org/10.5194/bg-11-6307-2014 https://www.biogeosciences.net/11/6307/2014/ eng eng info:eu-repo/grantAgreement/EC/FP7/282700 doi:10.5194/bg-11-6307-2014 https://www.biogeosciences.net/11/6307/2014/ info:eu-repo/semantics/openAccess eISSN: 1726-4189 info:eu-repo/semantics/Text 2018 ftcopernicus https://doi.org/10.5194/bg-11-6307-2014 2019-12-24T09:54:01Z The annual variability of CO 2 exchange in most ecosystems is primarily driven by the activities of plants and soil microorganisms. However, little is known about the carbon balance and its controlling factors outside the growing season in Arctic regions dominated by soil freeze/thaw processes, long-lasting snow cover, and several months of darkness. This study presents a complete annual cycle of the CO 2 net ecosystem exchange (NEE) dynamics for a high Arctic tundra area at the west coast of Svalbard based on eddy covariance flux measurements. The annual cumulative CO 2 budget is close to 0 g C m −2 yr −1 , but displays a strong seasonal variability. Four major CO 2 exchange seasons have been identified. (1) During summer (snow-free ground), the CO 2 exchange occurs mainly as a result of biological activity, with a dominance of strong CO 2 assimilation by the ecosystem. (2) The autumn (snow-free ground or partly snow-covered) is dominated by CO 2 respiration as a result of biological activity. (3) In winter and spring (snow-covered ground), low but persistent CO 2 release occurs, overlayed by considerable CO 2 exchange events in both directions associated with high wind speed and changes of air masses and atmospheric air pressure. (4) The snow melt season (pattern of snow-free and snow-covered areas) is associated with both meteorological and biological forcing, resulting in a carbon uptake by the high Arctic ecosystem. Data related to this article are archived at http://doi.pangaea.de/10.1594/PANGAEA.809507 . Other/Unknown Material Arctic permafrost Svalbard Tundra Spitsbergen Copernicus Publications: E-Journals Arctic Svalbard Svalbard Archipelago Biogeosciences 11 22 6307 6322 |
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Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
The annual variability of CO 2 exchange in most ecosystems is primarily driven by the activities of plants and soil microorganisms. However, little is known about the carbon balance and its controlling factors outside the growing season in Arctic regions dominated by soil freeze/thaw processes, long-lasting snow cover, and several months of darkness. This study presents a complete annual cycle of the CO 2 net ecosystem exchange (NEE) dynamics for a high Arctic tundra area at the west coast of Svalbard based on eddy covariance flux measurements. The annual cumulative CO 2 budget is close to 0 g C m −2 yr −1 , but displays a strong seasonal variability. Four major CO 2 exchange seasons have been identified. (1) During summer (snow-free ground), the CO 2 exchange occurs mainly as a result of biological activity, with a dominance of strong CO 2 assimilation by the ecosystem. (2) The autumn (snow-free ground or partly snow-covered) is dominated by CO 2 respiration as a result of biological activity. (3) In winter and spring (snow-covered ground), low but persistent CO 2 release occurs, overlayed by considerable CO 2 exchange events in both directions associated with high wind speed and changes of air masses and atmospheric air pressure. (4) The snow melt season (pattern of snow-free and snow-covered areas) is associated with both meteorological and biological forcing, resulting in a carbon uptake by the high Arctic ecosystem. Data related to this article are archived at http://doi.pangaea.de/10.1594/PANGAEA.809507 . |
format |
Other/Unknown Material |
author |
Lüers, J. Westermann, S. Piel, K. Boike, J. |
spellingShingle |
Lüers, J. Westermann, S. Piel, K. Boike, J. Annual CO2 budget and seasonal CO2 exchange signals at a high Arctic permafrost site on Spitsbergen, Svalbard archipelago |
author_facet |
Lüers, J. Westermann, S. Piel, K. Boike, J. |
author_sort |
Lüers, J. |
title |
Annual CO2 budget and seasonal CO2 exchange signals at a high Arctic permafrost site on Spitsbergen, Svalbard archipelago |
title_short |
Annual CO2 budget and seasonal CO2 exchange signals at a high Arctic permafrost site on Spitsbergen, Svalbard archipelago |
title_full |
Annual CO2 budget and seasonal CO2 exchange signals at a high Arctic permafrost site on Spitsbergen, Svalbard archipelago |
title_fullStr |
Annual CO2 budget and seasonal CO2 exchange signals at a high Arctic permafrost site on Spitsbergen, Svalbard archipelago |
title_full_unstemmed |
Annual CO2 budget and seasonal CO2 exchange signals at a high Arctic permafrost site on Spitsbergen, Svalbard archipelago |
title_sort |
annual co2 budget and seasonal co2 exchange signals at a high arctic permafrost site on spitsbergen, svalbard archipelago |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-11-6307-2014 https://www.biogeosciences.net/11/6307/2014/ |
geographic |
Arctic Svalbard Svalbard Archipelago |
geographic_facet |
Arctic Svalbard Svalbard Archipelago |
genre |
Arctic permafrost Svalbard Tundra Spitsbergen |
genre_facet |
Arctic permafrost Svalbard Tundra Spitsbergen |
op_source |
eISSN: 1726-4189 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/282700 doi:10.5194/bg-11-6307-2014 https://www.biogeosciences.net/11/6307/2014/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-11-6307-2014 |
container_title |
Biogeosciences |
container_volume |
11 |
container_issue |
22 |
container_start_page |
6307 |
op_container_end_page |
6322 |
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1766322188802064384 |