Controls on methane released through ebullition in peatlands affected by permafrost degradation
Permafrost thaw in peat plateaus leads to the flooding of surface soils and the formation of collapse scar bogs, which have the potential to be large emitters of methane (CH4) from surface peat as well as deeper, previously frozen, permafrost carbon (C). We used a network of bubble traps, permanentl...
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Language: | English |
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ftcdlib:qt7pk481z7 2023-05-15T16:37:02+02:00 Controls on methane released through ebullition in peatlands affected by permafrost degradation Klapstein, SJ Turetsky, MR McGuire, AD Harden, JW Czimczik, CI Xu, X Chanton, JP Waddington, JM 418 - 431 2014-01-01 application/pdf http://www.escholarship.org/uc/item/7pk481z7 english eng eScholarship, University of California qt7pk481z7 http://www.escholarship.org/uc/item/7pk481z7 Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Klapstein, SJ; Turetsky, MR; McGuire, AD; Harden, JW; Czimczik, CI; Xu, X; et al.(2014). Controls on methane released through ebullition in peatlands affected by permafrost degradation. Journal of Geophysical Research: Biogeosciences, 119(3), 418 - 431. doi:10.1002/2013JG002441. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/7pk481z7 article 2014 ftcdlib https://doi.org/10.1002/2013JG002441 2018-11-16T23:52:05Z Permafrost thaw in peat plateaus leads to the flooding of surface soils and the formation of collapse scar bogs, which have the potential to be large emitters of methane (CH4) from surface peat as well as deeper, previously frozen, permafrost carbon (C). We used a network of bubble traps, permanently installed 20cm and 60cm beneath the moss surface, to examine controls on ebullition from three collapse bogs in interior Alaska. Overall, ebullition was dominated by episodic events that were associated with changes in atmospheric pressure, and ebullition was mainly a surface process regulated by both seasonal ice dynamics and plant phenology. The majority (>90%) of ebullition occurred in surface peat layers, with little bubble production in deeper peat. During periods of peak plant biomass, bubbles contained acetate-derived CH4 dominated (>90%) by modern C fixed from the atmosphere following permafrost thaw. Post-senescence, the contribution of CH4 derived from thawing permafrost C was more variable and accounted for up to 22% (on average 7%), in the most recently thawed site. Thus, the formation of thermokarst features resulting from permafrost thaw in peatlands stimulates ebullition and CH4 release both by creating flooded surface conditions conducive to CH4 production and bubbling as well as by exposing thawing permafrost C to mineralization. ©2014. American Geophysical Union. All Rights Reserved. Article in Journal/Newspaper Ice Peat permafrost Thermokarst Alaska University of California: eScholarship Journal of Geophysical Research: Biogeosciences 119 3 418 431 |
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Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
description |
Permafrost thaw in peat plateaus leads to the flooding of surface soils and the formation of collapse scar bogs, which have the potential to be large emitters of methane (CH4) from surface peat as well as deeper, previously frozen, permafrost carbon (C). We used a network of bubble traps, permanently installed 20cm and 60cm beneath the moss surface, to examine controls on ebullition from three collapse bogs in interior Alaska. Overall, ebullition was dominated by episodic events that were associated with changes in atmospheric pressure, and ebullition was mainly a surface process regulated by both seasonal ice dynamics and plant phenology. The majority (>90%) of ebullition occurred in surface peat layers, with little bubble production in deeper peat. During periods of peak plant biomass, bubbles contained acetate-derived CH4 dominated (>90%) by modern C fixed from the atmosphere following permafrost thaw. Post-senescence, the contribution of CH4 derived from thawing permafrost C was more variable and accounted for up to 22% (on average 7%), in the most recently thawed site. Thus, the formation of thermokarst features resulting from permafrost thaw in peatlands stimulates ebullition and CH4 release both by creating flooded surface conditions conducive to CH4 production and bubbling as well as by exposing thawing permafrost C to mineralization. ©2014. American Geophysical Union. All Rights Reserved. |
format |
Article in Journal/Newspaper |
author |
Klapstein, SJ Turetsky, MR McGuire, AD Harden, JW Czimczik, CI Xu, X Chanton, JP Waddington, JM |
spellingShingle |
Klapstein, SJ Turetsky, MR McGuire, AD Harden, JW Czimczik, CI Xu, X Chanton, JP Waddington, JM Controls on methane released through ebullition in peatlands affected by permafrost degradation |
author_facet |
Klapstein, SJ Turetsky, MR McGuire, AD Harden, JW Czimczik, CI Xu, X Chanton, JP Waddington, JM |
author_sort |
Klapstein, SJ |
title |
Controls on methane released through ebullition in peatlands affected by permafrost degradation |
title_short |
Controls on methane released through ebullition in peatlands affected by permafrost degradation |
title_full |
Controls on methane released through ebullition in peatlands affected by permafrost degradation |
title_fullStr |
Controls on methane released through ebullition in peatlands affected by permafrost degradation |
title_full_unstemmed |
Controls on methane released through ebullition in peatlands affected by permafrost degradation |
title_sort |
controls on methane released through ebullition in peatlands affected by permafrost degradation |
publisher |
eScholarship, University of California |
publishDate |
2014 |
url |
http://www.escholarship.org/uc/item/7pk481z7 |
op_coverage |
418 - 431 |
genre |
Ice Peat permafrost Thermokarst Alaska |
genre_facet |
Ice Peat permafrost Thermokarst Alaska |
op_source |
Klapstein, SJ; Turetsky, MR; McGuire, AD; Harden, JW; Czimczik, CI; Xu, X; et al.(2014). Controls on methane released through ebullition in peatlands affected by permafrost degradation. Journal of Geophysical Research: Biogeosciences, 119(3), 418 - 431. doi:10.1002/2013JG002441. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/7pk481z7 |
op_relation |
qt7pk481z7 http://www.escholarship.org/uc/item/7pk481z7 |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/2013JG002441 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
119 |
container_issue |
3 |
container_start_page |
418 |
op_container_end_page |
431 |
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1766027337146564608 |