Atmospheric methane control mechanisms during the early Holocene
Understanding processes controlling the atmospheric methane (CH4) mixing ratio is crucial to predict and mitigate future climate changes in this gas. Despite recent detailed studies of the last ∼ 1000 to 2000 years, the mechanisms that control atmospheric CH4 still remain unclear, partly because the...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00008643 2023-05-15T13:34:49+02:00 Atmospheric methane control mechanisms during the early Holocene Yang, Ji-Woong Ahn, Jinho Brook, Edward J. Ryu, Yeongjun 2017-09 electronic https://doi.org/10.5194/cp-13-1227-2017 https://noa.gwlb.de/receive/cop_mods_00008643 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00008600/cp-13-1227-2017.pdf https://cp.copernicus.org/articles/13/1227/2017/cp-13-1227-2017.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-13-1227-2017 https://noa.gwlb.de/receive/cop_mods_00008643 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00008600/cp-13-1227-2017.pdf https://cp.copernicus.org/articles/13/1227/2017/cp-13-1227-2017.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2017 ftnonlinearchiv https://doi.org/10.5194/cp-13-1227-2017 2022-02-08T22:57:56Z Understanding processes controlling the atmospheric methane (CH4) mixing ratio is crucial to predict and mitigate future climate changes in this gas. Despite recent detailed studies of the last ∼ 1000 to 2000 years, the mechanisms that control atmospheric CH4 still remain unclear, partly because the late Holocene CH4 budget may be comprised of both natural and anthropogenic emissions. In contrast, the early Holocene was a period when human influence was substantially smaller, allowing us to elucidate more clearly the natural controls under interglacial conditions more clearly. Here we present new high-resolution CH4 records from Siple Dome, Antarctica, covering from 11.6 to 7.7 thousands of years before 1950 AD (ka). We observe four local CH4 minima on a roughly 1000-year spacing, which correspond to cool periods in Greenland. We hypothesize that the cooling in Greenland forced the Intertropical Convergence Zone (ITCZ) to migrate southward, reducing rainfall in northern tropical wetlands. The inter-polar difference (IPD) of CH4 shows a gradual increase from the onset of the Holocene to ∼ 9.5 ka, which implies growth of boreal source strength following the climate warming in the northern extratropics during that period. Article in Journal/Newspaper Antarc* Antarctica Greenland Niedersächsisches Online-Archiv NOA Greenland Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Siple Dome ENVELOPE(-148.833,-148.833,-81.667,-81.667) Climate of the Past 13 9 1227 1242 |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Yang, Ji-Woong Ahn, Jinho Brook, Edward J. Ryu, Yeongjun Atmospheric methane control mechanisms during the early Holocene |
topic_facet |
article Verlagsveröffentlichung |
description |
Understanding processes controlling the atmospheric methane (CH4) mixing ratio is crucial to predict and mitigate future climate changes in this gas. Despite recent detailed studies of the last ∼ 1000 to 2000 years, the mechanisms that control atmospheric CH4 still remain unclear, partly because the late Holocene CH4 budget may be comprised of both natural and anthropogenic emissions. In contrast, the early Holocene was a period when human influence was substantially smaller, allowing us to elucidate more clearly the natural controls under interglacial conditions more clearly. Here we present new high-resolution CH4 records from Siple Dome, Antarctica, covering from 11.6 to 7.7 thousands of years before 1950 AD (ka). We observe four local CH4 minima on a roughly 1000-year spacing, which correspond to cool periods in Greenland. We hypothesize that the cooling in Greenland forced the Intertropical Convergence Zone (ITCZ) to migrate southward, reducing rainfall in northern tropical wetlands. The inter-polar difference (IPD) of CH4 shows a gradual increase from the onset of the Holocene to ∼ 9.5 ka, which implies growth of boreal source strength following the climate warming in the northern extratropics during that period. |
format |
Article in Journal/Newspaper |
author |
Yang, Ji-Woong Ahn, Jinho Brook, Edward J. Ryu, Yeongjun |
author_facet |
Yang, Ji-Woong Ahn, Jinho Brook, Edward J. Ryu, Yeongjun |
author_sort |
Yang, Ji-Woong |
title |
Atmospheric methane control mechanisms during the early Holocene |
title_short |
Atmospheric methane control mechanisms during the early Holocene |
title_full |
Atmospheric methane control mechanisms during the early Holocene |
title_fullStr |
Atmospheric methane control mechanisms during the early Holocene |
title_full_unstemmed |
Atmospheric methane control mechanisms during the early Holocene |
title_sort |
atmospheric methane control mechanisms during the early holocene |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/cp-13-1227-2017 https://noa.gwlb.de/receive/cop_mods_00008643 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00008600/cp-13-1227-2017.pdf https://cp.copernicus.org/articles/13/1227/2017/cp-13-1227-2017.pdf |
long_lat |
ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-148.833,-148.833,-81.667,-81.667) |
geographic |
Greenland Siple Siple Dome |
geographic_facet |
Greenland Siple Siple Dome |
genre |
Antarc* Antarctica Greenland |
genre_facet |
Antarc* Antarctica Greenland |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-13-1227-2017 https://noa.gwlb.de/receive/cop_mods_00008643 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00008600/cp-13-1227-2017.pdf https://cp.copernicus.org/articles/13/1227/2017/cp-13-1227-2017.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-13-1227-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
9 |
container_start_page |
1227 |
op_container_end_page |
1242 |
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1766058004651704320 |