Atmospheric methane during the last four glacial-interglacial cycles: Rapid changes and their link with Antarctic temperature
Atmospheric methane (CH₄) recorded in Antarctic ice cores represents the closest ice proxy available for Greenland temperature changes beyond times when Greenland climate records are available. The record over four climatic cycles from the Vostok ice core offers the opportunity to study the phase re...
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ftoregonstate:ir.library.oregonstate.edu:tt44pp23b 2024-04-14T08:02:45+00:00 Atmospheric methane during the last four glacial-interglacial cycles: Rapid changes and their link with Antarctic temperature Delmotte, M. Chappellaz, J. Brook, Edward J. Yiou, P. Barnola, J. M. Goujon, C. Raynaud, D. Lipenkov, V. I. https://ir.library.oregonstate.edu/concern/articles/tt44pp23b English [eng] eng unknown American Geophysical Union https://ir.library.oregonstate.edu/concern/articles/tt44pp23b Copyright Not Evaluated Article ftoregonstate 2024-03-21T15:51:03Z Atmospheric methane (CH₄) recorded in Antarctic ice cores represents the closest ice proxy available for Greenland temperature changes beyond times when Greenland climate records are available. The record over four climatic cycles from the Vostok ice core offers the opportunity to study the phase relationship between Greenland and Antarctic climate changes through detailed CH₄ profiles. Combining American and French analytical efforts, we have improved the time resolution of the existing CH₄ record from Petit et al. [1999] . Spectral analyses reveal high- and low-frequency variability (including a strong precessional component). The phase relationship between CH₄ and the Antarctic temperature proxy (δD) shows a systematic lag of CH₄ versus temperature by 1100 ± 200 years, on long timescales (50–400 kyr) and a more complex behavior over shorter timescales (i.e., ≤25 kyr), suggesting that Dansgaard/Oeschger-type of climatic variability and associated interhemispheric linkage are robust features of late Quaternary climate. Article in Journal/Newspaper Antarc* Antarctic Greenland ice core ScholarsArchive@OSU (Oregon State University) Antarctic The Antarctic Greenland |
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Open Polar |
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ScholarsArchive@OSU (Oregon State University) |
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ftoregonstate |
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English unknown |
description |
Atmospheric methane (CH₄) recorded in Antarctic ice cores represents the closest ice proxy available for Greenland temperature changes beyond times when Greenland climate records are available. The record over four climatic cycles from the Vostok ice core offers the opportunity to study the phase relationship between Greenland and Antarctic climate changes through detailed CH₄ profiles. Combining American and French analytical efforts, we have improved the time resolution of the existing CH₄ record from Petit et al. [1999] . Spectral analyses reveal high- and low-frequency variability (including a strong precessional component). The phase relationship between CH₄ and the Antarctic temperature proxy (δD) shows a systematic lag of CH₄ versus temperature by 1100 ± 200 years, on long timescales (50–400 kyr) and a more complex behavior over shorter timescales (i.e., ≤25 kyr), suggesting that Dansgaard/Oeschger-type of climatic variability and associated interhemispheric linkage are robust features of late Quaternary climate. |
format |
Article in Journal/Newspaper |
author |
Delmotte, M. Chappellaz, J. Brook, Edward J. Yiou, P. Barnola, J. M. Goujon, C. Raynaud, D. Lipenkov, V. I. |
spellingShingle |
Delmotte, M. Chappellaz, J. Brook, Edward J. Yiou, P. Barnola, J. M. Goujon, C. Raynaud, D. Lipenkov, V. I. Atmospheric methane during the last four glacial-interglacial cycles: Rapid changes and their link with Antarctic temperature |
author_facet |
Delmotte, M. Chappellaz, J. Brook, Edward J. Yiou, P. Barnola, J. M. Goujon, C. Raynaud, D. Lipenkov, V. I. |
author_sort |
Delmotte, M. |
title |
Atmospheric methane during the last four glacial-interglacial cycles: Rapid changes and their link with Antarctic temperature |
title_short |
Atmospheric methane during the last four glacial-interglacial cycles: Rapid changes and their link with Antarctic temperature |
title_full |
Atmospheric methane during the last four glacial-interglacial cycles: Rapid changes and their link with Antarctic temperature |
title_fullStr |
Atmospheric methane during the last four glacial-interglacial cycles: Rapid changes and their link with Antarctic temperature |
title_full_unstemmed |
Atmospheric methane during the last four glacial-interglacial cycles: Rapid changes and their link with Antarctic temperature |
title_sort |
atmospheric methane during the last four glacial-interglacial cycles: rapid changes and their link with antarctic temperature |
publisher |
American Geophysical Union |
url |
https://ir.library.oregonstate.edu/concern/articles/tt44pp23b |
geographic |
Antarctic The Antarctic Greenland |
geographic_facet |
Antarctic The Antarctic Greenland |
genre |
Antarc* Antarctic Greenland ice core |
genre_facet |
Antarc* Antarctic Greenland ice core |
op_relation |
https://ir.library.oregonstate.edu/concern/articles/tt44pp23b |
op_rights |
Copyright Not Evaluated |
_version_ |
1796317349065785344 |