Tightened constraints on the time-lag between Antarctic temperature and CO2 during the last deglaciation
Antarctic ice cores provide clear evidence of a close coupling between variations in Antarctic temperature and the atmospheric concentration of CO2 during the glacial/interglacial cycles of at least the past 800-thousand years. Precise information on the relative timing of the temperature and CO2 ch...
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Copernicus Publications
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Online Access: | https://doi.org/10.5194/cp-8-1213-2012 http://www.clim-past.net/8/1213/2012/cp-8-1213-2012.pdf https://doaj.org/article/72e9cdcb423f42fc9b1cdd05017c6fa7 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:72e9cdcb423f42fc9b1cdd05017c6fa7 2023-05-15T13:36:06+02:00 Tightened constraints on the time-lag between Antarctic temperature and CO2 during the last deglaciation T. D. van Ommen S. O. Rasmussen J. B. Pedro 2012-07-01 https://doi.org/10.5194/cp-8-1213-2012 http://www.clim-past.net/8/1213/2012/cp-8-1213-2012.pdf https://doaj.org/article/72e9cdcb423f42fc9b1cdd05017c6fa7 en eng Copernicus Publications doi:10.5194/cp-8-1213-2012 1814-9324 1814-9332 http://www.clim-past.net/8/1213/2012/cp-8-1213-2012.pdf https://doaj.org/article/72e9cdcb423f42fc9b1cdd05017c6fa7 undefined Climate of the Past, Vol 8, Iss 4, Pp 1213-1221 (2012) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2012 fttriple https://doi.org/10.5194/cp-8-1213-2012 2023-01-22T18:19:20Z Antarctic ice cores provide clear evidence of a close coupling between variations in Antarctic temperature and the atmospheric concentration of CO2 during the glacial/interglacial cycles of at least the past 800-thousand years. Precise information on the relative timing of the temperature and CO2 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 CO2 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 CO2 records with high dating precision, we show that the increase in CO2 likely lagged the increase in regional Antarctic temperature by less than 400 yr and that even a short lead of CO2 over temperature cannot be excluded. This result, consistent for both CO2 records, implies a faster coupling between temperature and CO2 than previous estimates, which had permitted up to millennial-scale lags. Article in Journal/Newspaper Antarc* Antarctic ice core Unknown Antarctic Climate of the Past 8 4 1213 1221 |
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English |
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geo envir |
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geo envir T. D. van Ommen S. O. Rasmussen J. B. Pedro Tightened constraints on the time-lag between Antarctic temperature and CO2 during the last deglaciation |
topic_facet |
geo envir |
description |
Antarctic ice cores provide clear evidence of a close coupling between variations in Antarctic temperature and the atmospheric concentration of CO2 during the glacial/interglacial cycles of at least the past 800-thousand years. Precise information on the relative timing of the temperature and CO2 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 CO2 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 CO2 records with high dating precision, we show that the increase in CO2 likely lagged the increase in regional Antarctic temperature by less than 400 yr and that even a short lead of CO2 over temperature cannot be excluded. This result, consistent for both CO2 records, implies a faster coupling between temperature and CO2 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 CO2 during the last deglaciation |
title_short |
Tightened constraints on the time-lag between Antarctic temperature and CO2 during the last deglaciation |
title_full |
Tightened constraints on the time-lag between Antarctic temperature and CO2 during the last deglaciation |
title_fullStr |
Tightened constraints on the time-lag between Antarctic temperature and CO2 during the last deglaciation |
title_full_unstemmed |
Tightened constraints on the time-lag between Antarctic temperature and CO2 during the last deglaciation |
title_sort |
tightened constraints on the time-lag between antarctic temperature and co2 during the last deglaciation |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/cp-8-1213-2012 http://www.clim-past.net/8/1213/2012/cp-8-1213-2012.pdf 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 |
doi:10.5194/cp-8-1213-2012 1814-9324 1814-9332 http://www.clim-past.net/8/1213/2012/cp-8-1213-2012.pdf https://doaj.org/article/72e9cdcb423f42fc9b1cdd05017c6fa7 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-8-1213-2012 |
container_title |
Climate of the Past |
container_volume |
8 |
container_issue |
4 |
container_start_page |
1213 |
op_container_end_page |
1221 |
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1766074212577968128 |