Atmospheric methane since the last glacial maximum was driven by wetland sources
Atmospheric methane (CH 4 ) has changed considerably in the time between the last glacial maximum (LGM) and the preindustrial (PI) periods. We investigate these changes in transient experiments with an Earth system model capable of simulating the global methane cycle interactively, focusing on the r...
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ftdoajarticles:oai:doaj.org/article:8827786f5e1c4eb598a4d7ab59edc34d 2023-06-18T03:41:14+02:00 Atmospheric methane since the last glacial maximum was driven by wetland sources T. Kleinen S. Gromov B. Steil V. Brovkin 2023-06-01T00:00:00Z https://doi.org/10.5194/cp-19-1081-2023 https://doaj.org/article/8827786f5e1c4eb598a4d7ab59edc34d EN eng Copernicus Publications https://cp.copernicus.org/articles/19/1081/2023/cp-19-1081-2023.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-19-1081-2023 1814-9324 1814-9332 https://doaj.org/article/8827786f5e1c4eb598a4d7ab59edc34d Climate of the Past, Vol 19, Pp 1081-1099 (2023) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2023 ftdoajarticles https://doi.org/10.5194/cp-19-1081-2023 2023-06-04T00:34:38Z Atmospheric methane (CH 4 ) has changed considerably in the time between the last glacial maximum (LGM) and the preindustrial (PI) periods. We investigate these changes in transient experiments with an Earth system model capable of simulating the global methane cycle interactively, focusing on the rapid changes during the deglaciation, especially pronounced in the Bølling–Allerød (BA) and Younger Dryas (YD) periods. We consider all relevant natural sources and sinks of methane and examine the drivers of changes in methane emissions as well as in the atmospheric lifetime of methane. We find that the evolution of atmospheric methane is largely driven by emissions from tropical wetlands, while variations in the methane atmospheric lifetime are small but not negligible. Our model reproduces most changes in atmospheric methane very well, with the exception of the mid-Holocene decrease in methane, although the timing of ice-sheet meltwater fluxes needs to be adjusted slightly in order to exactly reproduce the variations in the BA and YD. Article in Journal/Newspaper Ice Sheet Directory of Open Access Journals: DOAJ Articles Climate of the Past 19 5 1081 1099 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 T. Kleinen S. Gromov B. Steil V. Brovkin Atmospheric methane since the last glacial maximum was driven by wetland sources |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Atmospheric methane (CH 4 ) has changed considerably in the time between the last glacial maximum (LGM) and the preindustrial (PI) periods. We investigate these changes in transient experiments with an Earth system model capable of simulating the global methane cycle interactively, focusing on the rapid changes during the deglaciation, especially pronounced in the Bølling–Allerød (BA) and Younger Dryas (YD) periods. We consider all relevant natural sources and sinks of methane and examine the drivers of changes in methane emissions as well as in the atmospheric lifetime of methane. We find that the evolution of atmospheric methane is largely driven by emissions from tropical wetlands, while variations in the methane atmospheric lifetime are small but not negligible. Our model reproduces most changes in atmospheric methane very well, with the exception of the mid-Holocene decrease in methane, although the timing of ice-sheet meltwater fluxes needs to be adjusted slightly in order to exactly reproduce the variations in the BA and YD. |
format |
Article in Journal/Newspaper |
author |
T. Kleinen S. Gromov B. Steil V. Brovkin |
author_facet |
T. Kleinen S. Gromov B. Steil V. Brovkin |
author_sort |
T. Kleinen |
title |
Atmospheric methane since the last glacial maximum was driven by wetland sources |
title_short |
Atmospheric methane since the last glacial maximum was driven by wetland sources |
title_full |
Atmospheric methane since the last glacial maximum was driven by wetland sources |
title_fullStr |
Atmospheric methane since the last glacial maximum was driven by wetland sources |
title_full_unstemmed |
Atmospheric methane since the last glacial maximum was driven by wetland sources |
title_sort |
atmospheric methane since the last glacial maximum was driven by wetland sources |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/cp-19-1081-2023 https://doaj.org/article/8827786f5e1c4eb598a4d7ab59edc34d |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Climate of the Past, Vol 19, Pp 1081-1099 (2023) |
op_relation |
https://cp.copernicus.org/articles/19/1081/2023/cp-19-1081-2023.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-19-1081-2023 1814-9324 1814-9332 https://doaj.org/article/8827786f5e1c4eb598a4d7ab59edc34d |
op_doi |
https://doi.org/10.5194/cp-19-1081-2023 |
container_title |
Climate of the Past |
container_volume |
19 |
container_issue |
5 |
container_start_page |
1081 |
op_container_end_page |
1099 |
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1769006719223988224 |