Terrestrial methane emissions from Last Glacial Maximum to preindustrial
We investigate the changes in terrestrial natural methane emissions between the Last Glacial Maximum (LGM) and preindustrial (PI) by performing time-slice experiments with a methane-enabled version of MPI-ESM, the Max Planck Institute for Meteorology Earth System Model. We consider all natural sourc...
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ftcopernicus:oai:publications.copernicus.org:cpd79734 2023-05-15T16:40:55+02:00 Terrestrial methane emissions from Last Glacial Maximum to preindustrial Kleinen, Thomas Mikolajewicz, Uwe Brovkin, Victor 2019-09-13 application/pdf https://doi.org/10.5194/cp-2019-109 https://www.clim-past-discuss.net/cp-2019-109/ eng eng doi:10.5194/cp-2019-109 https://www.clim-past-discuss.net/cp-2019-109/ eISSN: 1814-9332 Text 2019 ftcopernicus https://doi.org/10.5194/cp-2019-109 2019-12-24T09:48:32Z We investigate the changes in terrestrial natural methane emissions between the Last Glacial Maximum (LGM) and preindustrial (PI) by performing time-slice experiments with a methane-enabled version of MPI-ESM, the Max Planck Institute for Meteorology Earth System Model. We consider all natural sources of methane except for emissions from wild animals and geological sources, i.e. emissions from wetlands, fires, and termites. Changes are dominated by changes in tropical wetland emissions, with mid-to-high latitude wetlands playing a secondary role, and all other natural sources being of minor importance. The emissions are determined by the interplay of vegetation productivity, a function of CO 2 and temperature, source area size, affected by sea level and ice sheet extent, and the state of the West African Monsoon, with increased emissions from north Africa during strong monsoon phases. We show that it is possible to explain the difference in atmospheric methane between LGM and PI purely by changes in emissions. As emissions more than double between LGM and PI, changes in the atmospheric lifetime of CH 4 , as proposed in other studies, are not required. Text Ice Sheet Copernicus Publications: E-Journals |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
We investigate the changes in terrestrial natural methane emissions between the Last Glacial Maximum (LGM) and preindustrial (PI) by performing time-slice experiments with a methane-enabled version of MPI-ESM, the Max Planck Institute for Meteorology Earth System Model. We consider all natural sources of methane except for emissions from wild animals and geological sources, i.e. emissions from wetlands, fires, and termites. Changes are dominated by changes in tropical wetland emissions, with mid-to-high latitude wetlands playing a secondary role, and all other natural sources being of minor importance. The emissions are determined by the interplay of vegetation productivity, a function of CO 2 and temperature, source area size, affected by sea level and ice sheet extent, and the state of the West African Monsoon, with increased emissions from north Africa during strong monsoon phases. We show that it is possible to explain the difference in atmospheric methane between LGM and PI purely by changes in emissions. As emissions more than double between LGM and PI, changes in the atmospheric lifetime of CH 4 , as proposed in other studies, are not required. |
format |
Text |
author |
Kleinen, Thomas Mikolajewicz, Uwe Brovkin, Victor |
spellingShingle |
Kleinen, Thomas Mikolajewicz, Uwe Brovkin, Victor Terrestrial methane emissions from Last Glacial Maximum to preindustrial |
author_facet |
Kleinen, Thomas Mikolajewicz, Uwe Brovkin, Victor |
author_sort |
Kleinen, Thomas |
title |
Terrestrial methane emissions from Last Glacial Maximum to preindustrial |
title_short |
Terrestrial methane emissions from Last Glacial Maximum to preindustrial |
title_full |
Terrestrial methane emissions from Last Glacial Maximum to preindustrial |
title_fullStr |
Terrestrial methane emissions from Last Glacial Maximum to preindustrial |
title_full_unstemmed |
Terrestrial methane emissions from Last Glacial Maximum to preindustrial |
title_sort |
terrestrial methane emissions from last glacial maximum to preindustrial |
publishDate |
2019 |
url |
https://doi.org/10.5194/cp-2019-109 https://www.clim-past-discuss.net/cp-2019-109/ |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-2019-109 https://www.clim-past-discuss.net/cp-2019-109/ |
op_doi |
https://doi.org/10.5194/cp-2019-109 |
_version_ |
1766031355185987584 |