Soil moisture control over autumn season methane flux, Arctic Coastal Plain of Alaska
Accurate estimates of annual budgets of methane (CH4) efflux in arctic regions are severely constrained by the paucity of non-summer measurements. Moreover, the incomplete understanding of the ecosystem-level sensitivity of CH4 emissions to changes in tundra moisture makes prediction of future CH4 r...
Published in: | Biogeosciences |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications
2012
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00025927 2023-05-15T14:50:49+02:00 Soil moisture control over autumn season methane flux, Arctic Coastal Plain of Alaska Sturtevant, C. S. Oechel, W. C. Zona, D. Kim, Y. Emerson, C. E. 2012-04 electronic https://doi.org/10.5194/bg-9-1423-2012 https://noa.gwlb.de/receive/cop_mods_00025927 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00025882/bg-9-1423-2012.pdf https://bg.copernicus.org/articles/9/1423/2012/bg-9-1423-2012.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-9-1423-2012 https://noa.gwlb.de/receive/cop_mods_00025927 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00025882/bg-9-1423-2012.pdf https://bg.copernicus.org/articles/9/1423/2012/bg-9-1423-2012.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2012 ftnonlinearchiv https://doi.org/10.5194/bg-9-1423-2012 2022-02-08T22:49:27Z Accurate estimates of annual budgets of methane (CH4) efflux in arctic regions are severely constrained by the paucity of non-summer measurements. Moreover, the incomplete understanding of the ecosystem-level sensitivity of CH4 emissions to changes in tundra moisture makes prediction of future CH4 release from the Arctic extremely difficult. This study addresses some of these research gaps by presenting an analysis of eddy covariance and chamber measurements of CH4 efflux and supporting environmental variables during the autumn season and associated beginning of soil freeze-up at our large-scale water manipulation site near Barrow, Alaska (the Biocomplexity Experiment). We found that the autumn season CH4 emission is significant (accounting for 21–25% of the average growing season emission), and that this emission is mostly controlled by the fraction of inundated landscape, atmospheric turbulence, and the decline in unfrozen water during the period of soil freezing. Drainage decreased autumn CH4 emission by a factor of 2.4 compared to our flooded treatment. Flooding slowed the soil freezing process which has implications for extending elevated CH4 emissions longer into the winter season. Article in Journal/Newspaper Arctic Barrow Tundra Alaska Niedersächsisches Online-Archiv NOA Arctic Biogeosciences 9 4 1423 1440 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Sturtevant, C. S. Oechel, W. C. Zona, D. Kim, Y. Emerson, C. E. Soil moisture control over autumn season methane flux, Arctic Coastal Plain of Alaska |
topic_facet |
article Verlagsveröffentlichung |
description |
Accurate estimates of annual budgets of methane (CH4) efflux in arctic regions are severely constrained by the paucity of non-summer measurements. Moreover, the incomplete understanding of the ecosystem-level sensitivity of CH4 emissions to changes in tundra moisture makes prediction of future CH4 release from the Arctic extremely difficult. This study addresses some of these research gaps by presenting an analysis of eddy covariance and chamber measurements of CH4 efflux and supporting environmental variables during the autumn season and associated beginning of soil freeze-up at our large-scale water manipulation site near Barrow, Alaska (the Biocomplexity Experiment). We found that the autumn season CH4 emission is significant (accounting for 21–25% of the average growing season emission), and that this emission is mostly controlled by the fraction of inundated landscape, atmospheric turbulence, and the decline in unfrozen water during the period of soil freezing. Drainage decreased autumn CH4 emission by a factor of 2.4 compared to our flooded treatment. Flooding slowed the soil freezing process which has implications for extending elevated CH4 emissions longer into the winter season. |
format |
Article in Journal/Newspaper |
author |
Sturtevant, C. S. Oechel, W. C. Zona, D. Kim, Y. Emerson, C. E. |
author_facet |
Sturtevant, C. S. Oechel, W. C. Zona, D. Kim, Y. Emerson, C. E. |
author_sort |
Sturtevant, C. S. |
title |
Soil moisture control over autumn season methane flux, Arctic Coastal Plain of Alaska |
title_short |
Soil moisture control over autumn season methane flux, Arctic Coastal Plain of Alaska |
title_full |
Soil moisture control over autumn season methane flux, Arctic Coastal Plain of Alaska |
title_fullStr |
Soil moisture control over autumn season methane flux, Arctic Coastal Plain of Alaska |
title_full_unstemmed |
Soil moisture control over autumn season methane flux, Arctic Coastal Plain of Alaska |
title_sort |
soil moisture control over autumn season methane flux, arctic coastal plain of alaska |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/bg-9-1423-2012 https://noa.gwlb.de/receive/cop_mods_00025927 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00025882/bg-9-1423-2012.pdf https://bg.copernicus.org/articles/9/1423/2012/bg-9-1423-2012.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Barrow Tundra Alaska |
genre_facet |
Arctic Barrow Tundra Alaska |
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-9-1423-2012 https://noa.gwlb.de/receive/cop_mods_00025927 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00025882/bg-9-1423-2012.pdf https://bg.copernicus.org/articles/9/1423/2012/bg-9-1423-2012.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-9-1423-2012 |
container_title |
Biogeosciences |
container_volume |
9 |
container_issue |
4 |
container_start_page |
1423 |
op_container_end_page |
1440 |
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1766321863548469248 |