Hydrologic Controls on Peat Permafrost and Carbon Processes: New Insights From Past and Future Modeling
Soil carbon (C) in permafrost peatlands is vulnerable to decomposition with thaw under a warming climate. The amount and form of C loss likely depends on the site hydrology following permafrost thaw, but antecedent conditions during peat accumulation are also likely important. We test the role of di...
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Online Access: | https://epic.awi.de/id/eprint/56193/ https://epic.awi.de/id/eprint/56193/1/Treat_etal_2022_Frontiers.pdf https://doi.org/10.3389/fenvs.2022.892925 https://hdl.handle.net/10013/epic.cbf66fb3-6417-4696-b9da-a2fcaf7f8253 |
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ftawi:oai:epic.awi.de:56193 2024-05-19T07:36:41+00:00 Hydrologic Controls on Peat Permafrost and Carbon Processes: New Insights From Past and Future Modeling Treat, Claire C Jones, Miriam C Alder, Jay Frolking, Steve 2022 application/pdf https://epic.awi.de/id/eprint/56193/ https://epic.awi.de/id/eprint/56193/1/Treat_etal_2022_Frontiers.pdf https://doi.org/10.3389/fenvs.2022.892925 https://hdl.handle.net/10013/epic.cbf66fb3-6417-4696-b9da-a2fcaf7f8253 unknown https://epic.awi.de/id/eprint/56193/1/Treat_etal_2022_Frontiers.pdf Treat, C. C. orcid:0000-0002-1225-8178 , Jones, M. C. , Alder, J. and Frolking, S. (2022) Hydrologic Controls on Peat Permafrost and Carbon Processes: New Insights From Past and Future Modeling , Frontiers in Environmental Science, 10 , p. 892925 . doi:10.3389/fenvs.2022.892925 <https://doi.org/10.3389/fenvs.2022.892925> , hdl:10013/epic.cbf66fb3-6417-4696-b9da-a2fcaf7f8253 info:eu-repo/semantics/openAccess EPIC3Frontiers in Environmental Science, 10, pp. 892925-892925, ISSN: 2296-665X Article isiRev info:eu-repo/semantics/article 2022 ftawi https://doi.org/10.3389/fenvs.2022.892925 2024-04-23T23:38:07Z Soil carbon (C) in permafrost peatlands is vulnerable to decomposition with thaw under a warming climate. The amount and form of C loss likely depends on the site hydrology following permafrost thaw, but antecedent conditions during peat accumulation are also likely important. We test the role of differing hydrologic conditions on rates of peat accumulation, permafrost formation, and response to warming at an Arctic tundra fen using a process-based model of peatland dynamics in wet and dry landscape settings that persist from peat initiation in the mid-Holocene through future simulations to 2100 CE and 2300 CE. Climate conditions for both the wet and dry landscape settings are driven by the same downscaled TraCE-21ka transient paleoclimate simulations and CCSM4 RCP8.5 climate drivers. The landscape setting controlled the rates of peat accumulation, permafrost formation and the response to climatic warming and permafrost thaw. The dry landscape scenario had high rates of initial peat accumulation (11.7 ± 3.4 mm decade−1) and rapid permafrost aggradation but similar total C stocks as the wet landscape scenario. The wet landscape scenario was more resilient to 21st century warming temperatures than the dry landscape scenario and showed 60% smaller C losses and 70% more new net peat C additions by 2100 CE. Differences in the modeled responses indicate the largest effect is related to the landscape setting and basin hydrology due to permafrost controls on decomposition, suggesting an important sensitivity to changing runoff patterns. These subtle hydrological effects will be difficult to capture at circumpolar scales but are important for the carbon balance of permafrost peatlands under future climate warming. Article in Journal/Newspaper Arctic permafrost Tundra Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Frontiers in Environmental Science 10 |
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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 |
Soil carbon (C) in permafrost peatlands is vulnerable to decomposition with thaw under a warming climate. The amount and form of C loss likely depends on the site hydrology following permafrost thaw, but antecedent conditions during peat accumulation are also likely important. We test the role of differing hydrologic conditions on rates of peat accumulation, permafrost formation, and response to warming at an Arctic tundra fen using a process-based model of peatland dynamics in wet and dry landscape settings that persist from peat initiation in the mid-Holocene through future simulations to 2100 CE and 2300 CE. Climate conditions for both the wet and dry landscape settings are driven by the same downscaled TraCE-21ka transient paleoclimate simulations and CCSM4 RCP8.5 climate drivers. The landscape setting controlled the rates of peat accumulation, permafrost formation and the response to climatic warming and permafrost thaw. The dry landscape scenario had high rates of initial peat accumulation (11.7 ± 3.4 mm decade−1) and rapid permafrost aggradation but similar total C stocks as the wet landscape scenario. The wet landscape scenario was more resilient to 21st century warming temperatures than the dry landscape scenario and showed 60% smaller C losses and 70% more new net peat C additions by 2100 CE. Differences in the modeled responses indicate the largest effect is related to the landscape setting and basin hydrology due to permafrost controls on decomposition, suggesting an important sensitivity to changing runoff patterns. These subtle hydrological effects will be difficult to capture at circumpolar scales but are important for the carbon balance of permafrost peatlands under future climate warming. |
format |
Article in Journal/Newspaper |
author |
Treat, Claire C Jones, Miriam C Alder, Jay Frolking, Steve |
spellingShingle |
Treat, Claire C Jones, Miriam C Alder, Jay Frolking, Steve Hydrologic Controls on Peat Permafrost and Carbon Processes: New Insights From Past and Future Modeling |
author_facet |
Treat, Claire C Jones, Miriam C Alder, Jay Frolking, Steve |
author_sort |
Treat, Claire C |
title |
Hydrologic Controls on Peat Permafrost and Carbon Processes: New Insights From Past and Future Modeling |
title_short |
Hydrologic Controls on Peat Permafrost and Carbon Processes: New Insights From Past and Future Modeling |
title_full |
Hydrologic Controls on Peat Permafrost and Carbon Processes: New Insights From Past and Future Modeling |
title_fullStr |
Hydrologic Controls on Peat Permafrost and Carbon Processes: New Insights From Past and Future Modeling |
title_full_unstemmed |
Hydrologic Controls on Peat Permafrost and Carbon Processes: New Insights From Past and Future Modeling |
title_sort |
hydrologic controls on peat permafrost and carbon processes: new insights from past and future modeling |
publishDate |
2022 |
url |
https://epic.awi.de/id/eprint/56193/ https://epic.awi.de/id/eprint/56193/1/Treat_etal_2022_Frontiers.pdf https://doi.org/10.3389/fenvs.2022.892925 https://hdl.handle.net/10013/epic.cbf66fb3-6417-4696-b9da-a2fcaf7f8253 |
genre |
Arctic permafrost Tundra |
genre_facet |
Arctic permafrost Tundra |
op_source |
EPIC3Frontiers in Environmental Science, 10, pp. 892925-892925, ISSN: 2296-665X |
op_relation |
https://epic.awi.de/id/eprint/56193/1/Treat_etal_2022_Frontiers.pdf Treat, C. C. orcid:0000-0002-1225-8178 , Jones, M. C. , Alder, J. and Frolking, S. (2022) Hydrologic Controls on Peat Permafrost and Carbon Processes: New Insights From Past and Future Modeling , Frontiers in Environmental Science, 10 , p. 892925 . doi:10.3389/fenvs.2022.892925 <https://doi.org/10.3389/fenvs.2022.892925> , hdl:10013/epic.cbf66fb3-6417-4696-b9da-a2fcaf7f8253 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3389/fenvs.2022.892925 |
container_title |
Frontiers in Environmental Science |
container_volume |
10 |
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1799475829070102528 |