CH4 and N2O fluctuations during the penultimate deglaciation
Deglaciations are characterized by the largest natural changes in methane (CH4) and nitrous oxide (N2O) concentrations of the past 800 000 years. Reconstructions of millennial- to centennial-scale variability within these periods are mostly restricted to the last deglaciation. In this study, we pres...
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Copernicus Publications
2021
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00057647 2024-09-15T18:03:29+00:00 CH4 and N2O fluctuations during the penultimate deglaciation Schmidely, Loïc Nehrbass-Ahles, Christoph Schmitt, Jochen Han, Juhyeong Silva, Lucas Shin, Jinwha Joos, Fortunat Chappellaz, Jérôme Fischer, Hubertus Stocker, Thomas F. 2021-08 electronic https://doi.org/10.5194/cp-17-1627-2021 https://noa.gwlb.de/receive/cop_mods_00057647 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057297/cp-17-1627-2021.pdf https://cp.copernicus.org/articles/17/1627/2021/cp-17-1627-2021.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-17-1627-2021 https://noa.gwlb.de/receive/cop_mods_00057647 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057297/cp-17-1627-2021.pdf https://cp.copernicus.org/articles/17/1627/2021/cp-17-1627-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/cp-17-1627-2021 2024-06-26T04:38:21Z Deglaciations are characterized by the largest natural changes in methane (CH4) and nitrous oxide (N2O) concentrations of the past 800 000 years. Reconstructions of millennial- to centennial-scale variability within these periods are mostly restricted to the last deglaciation. In this study, we present composite records of CH4 and N2O concentrations from the EPICA Dome C ice core covering the penultimate deglaciation at temporal resolutions of ∼100 years. Our data permit the identification of centennial-scale fluctuations during the transition from glacial to interglacial levels. At ∼134 000 and ∼129 000 years before present (hereafter ka), both CH4 and N2O increased on centennial timescales. These abrupt rises are similar to the fluctuations associated with the Dansgaard–Oeschger events identified in the last glacial period. In addition, gradually rising N2O levels at ∼130 ka resemble a pattern of increasing N2O concentrations on millennial timescales characterizing the later part of Heinrich stadials. Overall, the events in CH4 and N2O during the penultimate deglaciation exhibit modes of variability that are also found during the last deglaciation and glacial cycle, suggesting that the processes leading to changes in emission during the transitions were similar but their timing differed. Article in Journal/Newspaper Dansgaard-Oeschger events EPICA ice core Niedersächsisches Online-Archiv NOA Climate of the Past 17 4 1627 1643 |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Schmidely, Loïc Nehrbass-Ahles, Christoph Schmitt, Jochen Han, Juhyeong Silva, Lucas Shin, Jinwha Joos, Fortunat Chappellaz, Jérôme Fischer, Hubertus Stocker, Thomas F. CH4 and N2O fluctuations during the penultimate deglaciation |
topic_facet |
article Verlagsveröffentlichung |
description |
Deglaciations are characterized by the largest natural changes in methane (CH4) and nitrous oxide (N2O) concentrations of the past 800 000 years. Reconstructions of millennial- to centennial-scale variability within these periods are mostly restricted to the last deglaciation. In this study, we present composite records of CH4 and N2O concentrations from the EPICA Dome C ice core covering the penultimate deglaciation at temporal resolutions of ∼100 years. Our data permit the identification of centennial-scale fluctuations during the transition from glacial to interglacial levels. At ∼134 000 and ∼129 000 years before present (hereafter ka), both CH4 and N2O increased on centennial timescales. These abrupt rises are similar to the fluctuations associated with the Dansgaard–Oeschger events identified in the last glacial period. In addition, gradually rising N2O levels at ∼130 ka resemble a pattern of increasing N2O concentrations on millennial timescales characterizing the later part of Heinrich stadials. Overall, the events in CH4 and N2O during the penultimate deglaciation exhibit modes of variability that are also found during the last deglaciation and glacial cycle, suggesting that the processes leading to changes in emission during the transitions were similar but their timing differed. |
format |
Article in Journal/Newspaper |
author |
Schmidely, Loïc Nehrbass-Ahles, Christoph Schmitt, Jochen Han, Juhyeong Silva, Lucas Shin, Jinwha Joos, Fortunat Chappellaz, Jérôme Fischer, Hubertus Stocker, Thomas F. |
author_facet |
Schmidely, Loïc Nehrbass-Ahles, Christoph Schmitt, Jochen Han, Juhyeong Silva, Lucas Shin, Jinwha Joos, Fortunat Chappellaz, Jérôme Fischer, Hubertus Stocker, Thomas F. |
author_sort |
Schmidely, Loïc |
title |
CH4 and N2O fluctuations during the penultimate deglaciation |
title_short |
CH4 and N2O fluctuations during the penultimate deglaciation |
title_full |
CH4 and N2O fluctuations during the penultimate deglaciation |
title_fullStr |
CH4 and N2O fluctuations during the penultimate deglaciation |
title_full_unstemmed |
CH4 and N2O fluctuations during the penultimate deglaciation |
title_sort |
ch4 and n2o fluctuations during the penultimate deglaciation |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/cp-17-1627-2021 https://noa.gwlb.de/receive/cop_mods_00057647 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057297/cp-17-1627-2021.pdf https://cp.copernicus.org/articles/17/1627/2021/cp-17-1627-2021.pdf |
genre |
Dansgaard-Oeschger events EPICA ice core |
genre_facet |
Dansgaard-Oeschger events EPICA ice core |
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-17-1627-2021 https://noa.gwlb.de/receive/cop_mods_00057647 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057297/cp-17-1627-2021.pdf https://cp.copernicus.org/articles/17/1627/2021/cp-17-1627-2021.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/cp-17-1627-2021 |
container_title |
Climate of the Past |
container_volume |
17 |
container_issue |
4 |
container_start_page |
1627 |
op_container_end_page |
1643 |
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1810440974426439680 |