Methane Emissions from Northern Wetlands During the Holocene : A Synthesis Approach to Account for Wetland Expansion and Fen-Bog-Permafrost Transitions (Invited)
Methane emissions from northern high latitude wetlands constitute a major uncertainty in the atmospheric methane (CH4) budget during the Holocene. To reconstruct northern wetland methane emissions, we used an empirical model based on syntheses of observations of peat initiation from more than 3600 r...
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American Geophysical Union
2021
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Online Access: | https://epic.awi.de/id/eprint/55332/ https://epic.awi.de/id/eprint/55332/1/Treat_2021_AGUFM_CH4Reconstruction.zip https://agu.confex.com/agu/fm21/meetingapp.cgi/Paper/865879 https://hdl.handle.net/10013/epic.364fda78-c94b-4da3-aa9a-4cf4d39ad83b https://hdl.handle.net/ |
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ftawi:oai:epic.awi.de:55332 2023-05-15T17:56:26+02:00 Methane Emissions from Northern Wetlands During the Holocene : A Synthesis Approach to Account for Wetland Expansion and Fen-Bog-Permafrost Transitions (Invited) Treat, Claire Jones, Miriam C. Brosius, Laura Grosse, Guido Walter Anthony, Katey M. Frolking, Steve 2021-12-17 application/zip https://epic.awi.de/id/eprint/55332/ https://epic.awi.de/id/eprint/55332/1/Treat_2021_AGUFM_CH4Reconstruction.zip https://agu.confex.com/agu/fm21/meetingapp.cgi/Paper/865879 https://hdl.handle.net/10013/epic.364fda78-c94b-4da3-aa9a-4cf4d39ad83b https://hdl.handle.net/ unknown American Geophysical Union https://epic.awi.de/id/eprint/55332/1/Treat_2021_AGUFM_CH4Reconstruction.zip https://hdl.handle.net/ Treat, C. orcid:0000-0002-1225-8178 , Jones, M. C. , Brosius, L. , Grosse, G. orcid:0000-0001-5895-2141 , Walter Anthony, K. M. and Frolking, S. (2021) Methane Emissions from Northern Wetlands During the Holocene : A Synthesis Approach to Account for Wetland Expansion and Fen-Bog-Permafrost Transitions (Invited) , AGU Fall Meeting, New Orleans, LA, USA, 13 December 2021 - 17 December 2021 . hdl:10013/epic.364fda78-c94b-4da3-aa9a-4cf4d39ad83b EPIC3AGU Fall Meeting, New Orleans, LA, USA, 2021-12-13-2021-12-17American Geophysical Union Conference notRev info:eu-repo/semantics/conferenceObject 2021 ftawi 2021-12-24T15:46:40Z Methane emissions from northern high latitude wetlands constitute a major uncertainty in the atmospheric methane (CH4) budget during the Holocene. To reconstruct northern wetland methane emissions, we used an empirical model based on syntheses of observations of peat initiation from more than 3600 radiocarbon-dated basal peat ages, plant-macrofossil-derived peatland type from more than 250 peat cores from sites across the northern high latitudes, and observed CH4 emissions averaged from modern-day wetland types in order to explore the effects of wetland expansion and changes in wetland type. Peatland basal ages and plant macrofossil records showed the widespread formation of fens in major northern wetland complexes before 8000 BP. After 8000 BP, new fen formation continued, but widespread peatland succession (to bogs) and permafrost aggradation also occurred. Reconstructed CH4 emissions from peatlands increased rapidly between 10,600 BP and 6900 BP due to fen formation and expansion, then stabilized after 5000 BP at 42 ± 25 Tg CH4 y-1, as high methane-emitting fens transitioned to lower methane-emitting bogs and permafrost peatlands. Permafrost formation in northern peatlands after 1000 BP decreased CH4 emissions by 20% to 34 ± 21 Tg y-1 by the present day. Warming temperatures, changes in peatland hydrology, and permafrost thaw will likely change the magnitude of northern peatland emissions in the future. Conference Object permafrost Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Methane emissions from northern high latitude wetlands constitute a major uncertainty in the atmospheric methane (CH4) budget during the Holocene. To reconstruct northern wetland methane emissions, we used an empirical model based on syntheses of observations of peat initiation from more than 3600 radiocarbon-dated basal peat ages, plant-macrofossil-derived peatland type from more than 250 peat cores from sites across the northern high latitudes, and observed CH4 emissions averaged from modern-day wetland types in order to explore the effects of wetland expansion and changes in wetland type. Peatland basal ages and plant macrofossil records showed the widespread formation of fens in major northern wetland complexes before 8000 BP. After 8000 BP, new fen formation continued, but widespread peatland succession (to bogs) and permafrost aggradation also occurred. Reconstructed CH4 emissions from peatlands increased rapidly between 10,600 BP and 6900 BP due to fen formation and expansion, then stabilized after 5000 BP at 42 ± 25 Tg CH4 y-1, as high methane-emitting fens transitioned to lower methane-emitting bogs and permafrost peatlands. Permafrost formation in northern peatlands after 1000 BP decreased CH4 emissions by 20% to 34 ± 21 Tg y-1 by the present day. Warming temperatures, changes in peatland hydrology, and permafrost thaw will likely change the magnitude of northern peatland emissions in the future. |
format |
Conference Object |
author |
Treat, Claire Jones, Miriam C. Brosius, Laura Grosse, Guido Walter Anthony, Katey M. Frolking, Steve |
spellingShingle |
Treat, Claire Jones, Miriam C. Brosius, Laura Grosse, Guido Walter Anthony, Katey M. Frolking, Steve Methane Emissions from Northern Wetlands During the Holocene : A Synthesis Approach to Account for Wetland Expansion and Fen-Bog-Permafrost Transitions (Invited) |
author_facet |
Treat, Claire Jones, Miriam C. Brosius, Laura Grosse, Guido Walter Anthony, Katey M. Frolking, Steve |
author_sort |
Treat, Claire |
title |
Methane Emissions from Northern Wetlands During the Holocene : A Synthesis Approach to Account for Wetland Expansion and Fen-Bog-Permafrost Transitions (Invited) |
title_short |
Methane Emissions from Northern Wetlands During the Holocene : A Synthesis Approach to Account for Wetland Expansion and Fen-Bog-Permafrost Transitions (Invited) |
title_full |
Methane Emissions from Northern Wetlands During the Holocene : A Synthesis Approach to Account for Wetland Expansion and Fen-Bog-Permafrost Transitions (Invited) |
title_fullStr |
Methane Emissions from Northern Wetlands During the Holocene : A Synthesis Approach to Account for Wetland Expansion and Fen-Bog-Permafrost Transitions (Invited) |
title_full_unstemmed |
Methane Emissions from Northern Wetlands During the Holocene : A Synthesis Approach to Account for Wetland Expansion and Fen-Bog-Permafrost Transitions (Invited) |
title_sort |
methane emissions from northern wetlands during the holocene : a synthesis approach to account for wetland expansion and fen-bog-permafrost transitions (invited) |
publisher |
American Geophysical Union |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/55332/ https://epic.awi.de/id/eprint/55332/1/Treat_2021_AGUFM_CH4Reconstruction.zip https://agu.confex.com/agu/fm21/meetingapp.cgi/Paper/865879 https://hdl.handle.net/10013/epic.364fda78-c94b-4da3-aa9a-4cf4d39ad83b https://hdl.handle.net/ |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
EPIC3AGU Fall Meeting, New Orleans, LA, USA, 2021-12-13-2021-12-17American Geophysical Union |
op_relation |
https://epic.awi.de/id/eprint/55332/1/Treat_2021_AGUFM_CH4Reconstruction.zip https://hdl.handle.net/ Treat, C. orcid:0000-0002-1225-8178 , Jones, M. C. , Brosius, L. , Grosse, G. orcid:0000-0001-5895-2141 , Walter Anthony, K. M. and Frolking, S. (2021) Methane Emissions from Northern Wetlands During the Holocene : A Synthesis Approach to Account for Wetland Expansion and Fen-Bog-Permafrost Transitions (Invited) , AGU Fall Meeting, New Orleans, LA, USA, 13 December 2021 - 17 December 2021 . hdl:10013/epic.364fda78-c94b-4da3-aa9a-4cf4d39ad83b |
_version_ |
1766164600275861504 |