Soil moisture control over autumn season methane flux, Arctic Coastal Plain of Alaska
Accurate estimates of annual budgets of methane (CH 4 ) efflux in arctic regions are severely constrained by the paucity of non-summer measurements. Moreover, the incomplete understanding of the ecosystem-level sensitivity of CH 4 emissions to changes in tundra moisture makes prediction of future CH...
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2012
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Online Access: | https://doi.org/10.5194/bg-9-1423-2012 https://doaj.org/article/21a993cf6f43404c8f7a1797b76acf64 |
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ftdoajarticles:oai:doaj.org/article:21a993cf6f43404c8f7a1797b76acf64 2023-05-15T14:51:38+02:00 Soil moisture control over autumn season methane flux, Arctic Coastal Plain of Alaska C. S. Sturtevant W. C. Oechel D. Zona Y. Kim C. E. Emerson 2012-04-01T00:00:00Z https://doi.org/10.5194/bg-9-1423-2012 https://doaj.org/article/21a993cf6f43404c8f7a1797b76acf64 EN eng Copernicus Publications http://www.biogeosciences.net/9/1423/2012/bg-9-1423-2012.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-9-1423-2012 1726-4170 1726-4189 https://doaj.org/article/21a993cf6f43404c8f7a1797b76acf64 Biogeosciences, Vol 9, Iss 4, Pp 1423-1440 (2012) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2012 ftdoajarticles https://doi.org/10.5194/bg-9-1423-2012 2022-12-31T01:36:54Z Accurate estimates of annual budgets of methane (CH 4 ) efflux in arctic regions are severely constrained by the paucity of non-summer measurements. Moreover, the incomplete understanding of the ecosystem-level sensitivity of CH 4 emissions to changes in tundra moisture makes prediction of future CH 4 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 CH 4 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 CH 4 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 CH 4 emission by a factor of 2.4 compared to our flooded treatment. Flooding slowed the soil freezing process which has implications for extending elevated CH 4 emissions longer into the winter season. Article in Journal/Newspaper Arctic Barrow Tundra Alaska Directory of Open Access Journals: DOAJ Articles Arctic Biogeosciences 9 4 1423 1440 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
spellingShingle |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 C. S. Sturtevant W. C. Oechel D. Zona Y. Kim C. E. Emerson Soil moisture control over autumn season methane flux, Arctic Coastal Plain of Alaska |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Accurate estimates of annual budgets of methane (CH 4 ) efflux in arctic regions are severely constrained by the paucity of non-summer measurements. Moreover, the incomplete understanding of the ecosystem-level sensitivity of CH 4 emissions to changes in tundra moisture makes prediction of future CH 4 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 CH 4 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 CH 4 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 CH 4 emission by a factor of 2.4 compared to our flooded treatment. Flooding slowed the soil freezing process which has implications for extending elevated CH 4 emissions longer into the winter season. |
format |
Article in Journal/Newspaper |
author |
C. S. Sturtevant W. C. Oechel D. Zona Y. Kim C. E. Emerson |
author_facet |
C. S. Sturtevant W. C. Oechel D. Zona Y. Kim C. E. Emerson |
author_sort |
C. S. Sturtevant |
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://doaj.org/article/21a993cf6f43404c8f7a1797b76acf64 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Barrow Tundra Alaska |
genre_facet |
Arctic Barrow Tundra Alaska |
op_source |
Biogeosciences, Vol 9, Iss 4, Pp 1423-1440 (2012) |
op_relation |
http://www.biogeosciences.net/9/1423/2012/bg-9-1423-2012.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-9-1423-2012 1726-4170 1726-4189 https://doaj.org/article/21a993cf6f43404c8f7a1797b76acf64 |
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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1766322767079145472 |