Predicted Vulnerability of Carbon in Permafrost Peatlands with Future Climate Change and Permafrost Thaw in Western Canada
Climate warming in high-latitude regions is thawing carbon-rich permafrost soils, which can release carbon to the atmosphere and enhance climate warming. Using a coupled model of long-term peatland dynamics (Holocene Peat Model, HPM-Arctic), we quantify the potential loss of carbon with future clima...
Published in: | Journal of Geophysical Research: Biogeosciences |
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Online Access: | https://epic.awi.de/id/eprint/53984/ https://epic.awi.de/id/eprint/53984/1/Treat_etal_2021_JGRB.pdf https://doi.org/10.1029/2020JG005872 https://hdl.handle.net/10013/epic.2f9282f0-76f3-4a7c-9e6b-a238e148c05f |
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ftawi:oai:epic.awi.de:53984 2024-05-19T07:36:29+00:00 Predicted Vulnerability of Carbon in Permafrost Peatlands with Future Climate Change and Permafrost Thaw in Western Canada Treat, Claire C Jones, Miriam C Alder, Jay Sannel, A Britta K Camill, Philip Frolking, Steve 2021-05 application/pdf https://epic.awi.de/id/eprint/53984/ https://epic.awi.de/id/eprint/53984/1/Treat_etal_2021_JGRB.pdf https://doi.org/10.1029/2020JG005872 https://hdl.handle.net/10013/epic.2f9282f0-76f3-4a7c-9e6b-a238e148c05f unknown https://epic.awi.de/id/eprint/53984/1/Treat_etal_2021_JGRB.pdf Treat, C. C. orcid:0000-0002-1225-8178 , Jones, M. C. , Alder, J. , Sannel, A. B. K. , Camill, P. and Frolking, S. (2021) Predicted Vulnerability of Carbon in Permafrost Peatlands with Future Climate Change and Permafrost Thaw in Western Canada , Journal of Geophysical Research: Biogeosciences, 126 (5), e2020JG005872-e2020JG005872 . doi:10.1029/2020JG005872 <https://doi.org/10.1029/2020JG005872> , hdl:10013/epic.2f9282f0-76f3-4a7c-9e6b-a238e148c05f info:eu-repo/semantics/openAccess EPIC3Journal of Geophysical Research: Biogeosciences, 126(5), pp. e2020JG005872-e2020JG005872, ISSN: 2169-8953 Article isiRev info:eu-repo/semantics/article 2021 ftawi https://doi.org/10.1029/2020JG005872 2024-04-23T23:38:07Z Climate warming in high-latitude regions is thawing carbon-rich permafrost soils, which can release carbon to the atmosphere and enhance climate warming. Using a coupled model of long-term peatland dynamics (Holocene Peat Model, HPM-Arctic), we quantify the potential loss of carbon with future climate warming for six sites with differing climates and permafrost histories in Northwestern Canada. We compared the net carbon balance at 2100 CE resulting from new productivity and the decomposition of active layer and newly-thawed permafrost peats under RCP8.5 as a high-end constraint. Modeled net carbon losses ranged from -3.0 kg C m-2 (net loss) to +0.1 kg C m-2 (net gain) between 2015 to 2100. Losses of newly thawed permafrost peat comprised 0.2 to 25% (median: 1.6%) of “old” C loss, which were related to the residence time of peat in the active layer before being incorporated into the permafrost, peat temperature, and presence of permafrost. The largest C loss was from the permafrost-free site, not from permafrost sites. C losses were greatest from depths of 0.2 – 1.0 m. New C added to the profile through net primary productivity between 2015-2100 offset ~40% to >100% of old C losses across the sites. Differences between modeled active layer deepening and flooding following permafrost thaw resulted in very small differences in net C loss by 2100, illustrating the important role of present-day conditions and permafrost aggradation history in controlling net C loss. Article in Journal/Newspaper Arctic Climate change permafrost Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Journal of Geophysical Research: Biogeosciences 126 5 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Climate warming in high-latitude regions is thawing carbon-rich permafrost soils, which can release carbon to the atmosphere and enhance climate warming. Using a coupled model of long-term peatland dynamics (Holocene Peat Model, HPM-Arctic), we quantify the potential loss of carbon with future climate warming for six sites with differing climates and permafrost histories in Northwestern Canada. We compared the net carbon balance at 2100 CE resulting from new productivity and the decomposition of active layer and newly-thawed permafrost peats under RCP8.5 as a high-end constraint. Modeled net carbon losses ranged from -3.0 kg C m-2 (net loss) to +0.1 kg C m-2 (net gain) between 2015 to 2100. Losses of newly thawed permafrost peat comprised 0.2 to 25% (median: 1.6%) of “old” C loss, which were related to the residence time of peat in the active layer before being incorporated into the permafrost, peat temperature, and presence of permafrost. The largest C loss was from the permafrost-free site, not from permafrost sites. C losses were greatest from depths of 0.2 – 1.0 m. New C added to the profile through net primary productivity between 2015-2100 offset ~40% to >100% of old C losses across the sites. Differences between modeled active layer deepening and flooding following permafrost thaw resulted in very small differences in net C loss by 2100, illustrating the important role of present-day conditions and permafrost aggradation history in controlling net C loss. |
format |
Article in Journal/Newspaper |
author |
Treat, Claire C Jones, Miriam C Alder, Jay Sannel, A Britta K Camill, Philip Frolking, Steve |
spellingShingle |
Treat, Claire C Jones, Miriam C Alder, Jay Sannel, A Britta K Camill, Philip Frolking, Steve Predicted Vulnerability of Carbon in Permafrost Peatlands with Future Climate Change and Permafrost Thaw in Western Canada |
author_facet |
Treat, Claire C Jones, Miriam C Alder, Jay Sannel, A Britta K Camill, Philip Frolking, Steve |
author_sort |
Treat, Claire C |
title |
Predicted Vulnerability of Carbon in Permafrost Peatlands with Future Climate Change and Permafrost Thaw in Western Canada |
title_short |
Predicted Vulnerability of Carbon in Permafrost Peatlands with Future Climate Change and Permafrost Thaw in Western Canada |
title_full |
Predicted Vulnerability of Carbon in Permafrost Peatlands with Future Climate Change and Permafrost Thaw in Western Canada |
title_fullStr |
Predicted Vulnerability of Carbon in Permafrost Peatlands with Future Climate Change and Permafrost Thaw in Western Canada |
title_full_unstemmed |
Predicted Vulnerability of Carbon in Permafrost Peatlands with Future Climate Change and Permafrost Thaw in Western Canada |
title_sort |
predicted vulnerability of carbon in permafrost peatlands with future climate change and permafrost thaw in western canada |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/53984/ https://epic.awi.de/id/eprint/53984/1/Treat_etal_2021_JGRB.pdf https://doi.org/10.1029/2020JG005872 https://hdl.handle.net/10013/epic.2f9282f0-76f3-4a7c-9e6b-a238e148c05f |
genre |
Arctic Climate change permafrost |
genre_facet |
Arctic Climate change permafrost |
op_source |
EPIC3Journal of Geophysical Research: Biogeosciences, 126(5), pp. e2020JG005872-e2020JG005872, ISSN: 2169-8953 |
op_relation |
https://epic.awi.de/id/eprint/53984/1/Treat_etal_2021_JGRB.pdf Treat, C. C. orcid:0000-0002-1225-8178 , Jones, M. C. , Alder, J. , Sannel, A. B. K. , Camill, P. and Frolking, S. (2021) Predicted Vulnerability of Carbon in Permafrost Peatlands with Future Climate Change and Permafrost Thaw in Western Canada , Journal of Geophysical Research: Biogeosciences, 126 (5), e2020JG005872-e2020JG005872 . doi:10.1029/2020JG005872 <https://doi.org/10.1029/2020JG005872> , hdl:10013/epic.2f9282f0-76f3-4a7c-9e6b-a238e148c05f |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2020JG005872 |
container_title |
Journal of Geophysical Research: Biogeosciences |
container_volume |
126 |
container_issue |
5 |
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1799475616265797632 |