Glacial/interglacial wetland, biomass burning, and geologic methane emissions constrained by dual stable isotopic CH4 ice core records
Polar ice is a unique archive of past atmosphere. Here, we present methane stable isotope records (used as source fingerprint) for the current and two past interglacials and their preceding glacial maxima. Our data are used to constrain global emissions of methane. Tropical wetlands and floodplains...
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ftpubmed:oai:pubmedcentral.nih.gov:5530640 2023-05-15T16:39:00+02:00 Glacial/interglacial wetland, biomass burning, and geologic methane emissions constrained by dual stable isotopic CH4 ice core records Bock, Michael Schmitt, Jochen Beck, Jonas Seth, Barbara Chappellaz, Jérôme Fischer, Hubertus 2017-07-18 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5530640/ http://www.ncbi.nlm.nih.gov/pubmed/28673973 https://doi.org/10.1073/pnas.1613883114 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5530640/ http://www.ncbi.nlm.nih.gov/pubmed/28673973 http://dx.doi.org/10.1073/pnas.1613883114 PNAS Plus Text 2017 ftpubmed https://doi.org/10.1073/pnas.1613883114 2018-01-21T01:07:44Z Polar ice is a unique archive of past atmosphere. Here, we present methane stable isotope records (used as source fingerprint) for the current and two past interglacials and their preceding glacial maxima. Our data are used to constrain global emissions of methane. Tropical wetlands and floodplains seem to be the dominant sources of atmospheric methane changes, steered by past variations in sea level, monsoon intensity, temperature, and the water table. In contrast, geologic emissions of methane are stable over a wide range of climatic conditions. The long-term shift seen in both isotopes for the last 25,000 y compared with older intervals is likely connected to changes in the terrestrial biosphere and fire regimes as a consequence of megafauna extinction. Text ice core PubMed Central (PMC) Proceedings of the National Academy of Sciences 114 29 E5778 E5786 |
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PNAS Plus Bock, Michael Schmitt, Jochen Beck, Jonas Seth, Barbara Chappellaz, Jérôme Fischer, Hubertus Glacial/interglacial wetland, biomass burning, and geologic methane emissions constrained by dual stable isotopic CH4 ice core records |
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PNAS Plus |
description |
Polar ice is a unique archive of past atmosphere. Here, we present methane stable isotope records (used as source fingerprint) for the current and two past interglacials and their preceding glacial maxima. Our data are used to constrain global emissions of methane. Tropical wetlands and floodplains seem to be the dominant sources of atmospheric methane changes, steered by past variations in sea level, monsoon intensity, temperature, and the water table. In contrast, geologic emissions of methane are stable over a wide range of climatic conditions. The long-term shift seen in both isotopes for the last 25,000 y compared with older intervals is likely connected to changes in the terrestrial biosphere and fire regimes as a consequence of megafauna extinction. |
format |
Text |
author |
Bock, Michael Schmitt, Jochen Beck, Jonas Seth, Barbara Chappellaz, Jérôme Fischer, Hubertus |
author_facet |
Bock, Michael Schmitt, Jochen Beck, Jonas Seth, Barbara Chappellaz, Jérôme Fischer, Hubertus |
author_sort |
Bock, Michael |
title |
Glacial/interglacial wetland, biomass burning, and geologic methane emissions constrained by dual stable isotopic CH4 ice core records |
title_short |
Glacial/interglacial wetland, biomass burning, and geologic methane emissions constrained by dual stable isotopic CH4 ice core records |
title_full |
Glacial/interglacial wetland, biomass burning, and geologic methane emissions constrained by dual stable isotopic CH4 ice core records |
title_fullStr |
Glacial/interglacial wetland, biomass burning, and geologic methane emissions constrained by dual stable isotopic CH4 ice core records |
title_full_unstemmed |
Glacial/interglacial wetland, biomass burning, and geologic methane emissions constrained by dual stable isotopic CH4 ice core records |
title_sort |
glacial/interglacial wetland, biomass burning, and geologic methane emissions constrained by dual stable isotopic ch4 ice core records |
publisher |
National Academy of Sciences |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5530640/ http://www.ncbi.nlm.nih.gov/pubmed/28673973 https://doi.org/10.1073/pnas.1613883114 |
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ice core |
genre_facet |
ice core |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5530640/ http://www.ncbi.nlm.nih.gov/pubmed/28673973 http://dx.doi.org/10.1073/pnas.1613883114 |
op_doi |
https://doi.org/10.1073/pnas.1613883114 |
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Proceedings of the National Academy of Sciences |
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114 |
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29 |
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E5778 |
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E5786 |
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1766029368015978496 |