Tightened constraints on the time-lag between Antarctic temperature and CO 2 during the last deglaciation
Antarctic ice cores provide clear evidence of a close coupling between variations in Antarctic temperature and the atmospheric concentration of CO 2 during the glacial/interglacial cycles of at least the past 800-thousand years. Precise information on the relative timing of the temperature and CO 2...
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Online Access: | https://doi.org/10.5194/cp-8-1213-2012 https://doaj.org/article/72e9cdcb423f42fc9b1cdd05017c6fa7 |
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ftdoajarticles:oai:doaj.org/article:72e9cdcb423f42fc9b1cdd05017c6fa7 2023-05-15T14:00:47+02:00 Tightened constraints on the time-lag between Antarctic temperature and CO 2 during the last deglaciation T. D. van Ommen S. O. Rasmussen J. B. Pedro 2012-07-01T00:00:00Z https://doi.org/10.5194/cp-8-1213-2012 https://doaj.org/article/72e9cdcb423f42fc9b1cdd05017c6fa7 EN eng Copernicus Publications http://www.clim-past.net/8/1213/2012/cp-8-1213-2012.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-8-1213-2012 1814-9324 1814-9332 https://doaj.org/article/72e9cdcb423f42fc9b1cdd05017c6fa7 Climate of the Past, Vol 8, Iss 4, Pp 1213-1221 (2012) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2012 ftdoajarticles https://doi.org/10.5194/cp-8-1213-2012 2022-12-31T05:10:37Z Antarctic ice cores provide clear evidence of a close coupling between variations in Antarctic temperature and the atmospheric concentration of CO 2 during the glacial/interglacial cycles of at least the past 800-thousand years. Precise information on the relative timing of the temperature and CO 2 changes can assist in refining our understanding of the physical processes involved in this coupling. Here, we focus on the last deglaciation, 19 000 to 11 000 yr before present, during which CO 2 concentrations increased by ~80 parts per million by volume and Antarctic temperature increased by ~10 °C. Utilising a recently developed proxy for regional Antarctic temperature, derived from five near-coastal ice cores and two ice core CO 2 records with high dating precision, we show that the increase in CO 2 likely lagged the increase in regional Antarctic temperature by less than 400 yr and that even a short lead of CO 2 over temperature cannot be excluded. This result, consistent for both CO 2 records, implies a faster coupling between temperature and CO 2 than previous estimates, which had permitted up to millennial-scale lags. Article in Journal/Newspaper Antarc* Antarctic ice core Directory of Open Access Journals: DOAJ Articles Antarctic Climate of the Past 8 4 1213 1221 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 T. D. van Ommen S. O. Rasmussen J. B. Pedro Tightened constraints on the time-lag between Antarctic temperature and CO 2 during the last deglaciation |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Antarctic ice cores provide clear evidence of a close coupling between variations in Antarctic temperature and the atmospheric concentration of CO 2 during the glacial/interglacial cycles of at least the past 800-thousand years. Precise information on the relative timing of the temperature and CO 2 changes can assist in refining our understanding of the physical processes involved in this coupling. Here, we focus on the last deglaciation, 19 000 to 11 000 yr before present, during which CO 2 concentrations increased by ~80 parts per million by volume and Antarctic temperature increased by ~10 °C. Utilising a recently developed proxy for regional Antarctic temperature, derived from five near-coastal ice cores and two ice core CO 2 records with high dating precision, we show that the increase in CO 2 likely lagged the increase in regional Antarctic temperature by less than 400 yr and that even a short lead of CO 2 over temperature cannot be excluded. This result, consistent for both CO 2 records, implies a faster coupling between temperature and CO 2 than previous estimates, which had permitted up to millennial-scale lags. |
format |
Article in Journal/Newspaper |
author |
T. D. van Ommen S. O. Rasmussen J. B. Pedro |
author_facet |
T. D. van Ommen S. O. Rasmussen J. B. Pedro |
author_sort |
T. D. van Ommen |
title |
Tightened constraints on the time-lag between Antarctic temperature and CO 2 during the last deglaciation |
title_short |
Tightened constraints on the time-lag between Antarctic temperature and CO 2 during the last deglaciation |
title_full |
Tightened constraints on the time-lag between Antarctic temperature and CO 2 during the last deglaciation |
title_fullStr |
Tightened constraints on the time-lag between Antarctic temperature and CO 2 during the last deglaciation |
title_full_unstemmed |
Tightened constraints on the time-lag between Antarctic temperature and CO 2 during the last deglaciation |
title_sort |
tightened constraints on the time-lag between antarctic temperature and co 2 during the last deglaciation |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/cp-8-1213-2012 https://doaj.org/article/72e9cdcb423f42fc9b1cdd05017c6fa7 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic ice core |
genre_facet |
Antarc* Antarctic ice core |
op_source |
Climate of the Past, Vol 8, Iss 4, Pp 1213-1221 (2012) |
op_relation |
http://www.clim-past.net/8/1213/2012/cp-8-1213-2012.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-8-1213-2012 1814-9324 1814-9332 https://doaj.org/article/72e9cdcb423f42fc9b1cdd05017c6fa7 |
op_doi |
https://doi.org/10.5194/cp-8-1213-2012 |
container_title |
Climate of the Past |
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8 |
container_issue |
4 |
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1213 |
op_container_end_page |
1221 |
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1766270128553459712 |