Abrupt CO2 release to the atmosphere under glacial and early interglacial climate conditions
Bursts of carbon dioxide, released into the atmosphere and occurring on centennial time scales, were seen during the cold periods of the last glacial cycle but not in older or warmer conditions. Nehrbass-Ahles et al. present a record of atmospheric carbon dioxide concentrations retrieved from the Eu...
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American Association for the Advancement of Science
2020
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Online Access: | https://boris.unibe.ch/153002/1/nehrbass20sci_1000.full.pdf https://boris.unibe.ch/153002/8/nehrbassahles20scipreprint.pdf https://boris.unibe.ch/153002/ |
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ftunivbern:oai:boris.unibe.ch:153002 2023-08-20T03:59:51+02:00 Abrupt CO2 release to the atmosphere under glacial and early interglacial climate conditions Nehrbass-Ahles, C. Shin, J. Schmitt, J. Bereiter, B. Joos, F. Schilt, A. Schmidely, L. Silva, L. Teste, G. Grilli, R. Chappellaz, J. Hodell, D. Fischer, H. Stocker, T.F. 2020-08-21 application/pdf https://boris.unibe.ch/153002/1/nehrbass20sci_1000.full.pdf https://boris.unibe.ch/153002/8/nehrbassahles20scipreprint.pdf https://boris.unibe.ch/153002/ eng eng American Association for the Advancement of Science https://boris.unibe.ch/153002/ info:eu-repo/semantics/restrictedAccess info:eu-repo/semantics/openAccess Nehrbass-Ahles, C.; Shin, J.; Schmitt, J.; Bereiter, B.; Joos, F.; Schilt, A.; Schmidely, L.; Silva, L.; Teste, G.; Grilli, R.; Chappellaz, J.; Hodell, D.; Fischer, H.; Stocker, T.F. (2020). Abrupt CO2 release to the atmosphere under glacial and early interglacial climate conditions. Science, 369(6506), pp. 1000-1005. American Association for the Advancement of Science 10.1126/science.aay8178 <http://dx.doi.org/10.1126/science.aay8178> 530 Physics info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2020 ftunivbern https://doi.org/10.1126/science.aay8178 2023-07-31T22:05:18Z Bursts of carbon dioxide, released into the atmosphere and occurring on centennial time scales, were seen during the cold periods of the last glacial cycle but not in older or warmer conditions. Nehrbass-Ahles et al. present a record of atmospheric carbon dioxide concentrations retrieved from the European Project for Ice Coring in Antarctica Dome C ice core showing that these carbon dioxide jumps occurred during both cold and warm periods between 330,000 and 450,000 years ago. They relate these pulses to disruptions of the Atlantic meridional overturning circulation caused by freshwater discharge from ice sheets. Such rapid carbon dioxide increases could occur in the future if global warming also disrupts this ocean circulation pattern.Science, this issue p. 1000Pulse-like carbon dioxide release to the atmosphere on centennial time scales has only been identified for the most recent glacial and deglacial periods and is thought to be absent during warmer climate conditions. Here, we present a high-resolution carbon dioxide record from 330,000 to 450,000 years before present, revealing pronounced carbon dioxide jumps (CDJ) under cold and warm climate conditions. CDJ come in two varieties that we attribute to invigoration or weakening of the Atlantic meridional overturning circulation (AMOC) and associated northward and southward shifts of the intertropical convergence zone, respectively. We find that CDJ are pervasive features of the carbon cycle that can occur during interglacial climate conditions if land ice masses are sufficiently extended to be able to disturb the AMOC by freshwater input. Article in Journal/Newspaper Antarc* Antarctica ice core BORIS (Bern Open Repository and Information System, University of Bern) Science 369 6506 1000 1005 |
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BORIS (Bern Open Repository and Information System, University of Bern) |
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ftunivbern |
language |
English |
topic |
530 Physics |
spellingShingle |
530 Physics Nehrbass-Ahles, C. Shin, J. Schmitt, J. Bereiter, B. Joos, F. Schilt, A. Schmidely, L. Silva, L. Teste, G. Grilli, R. Chappellaz, J. Hodell, D. Fischer, H. Stocker, T.F. Abrupt CO2 release to the atmosphere under glacial and early interglacial climate conditions |
topic_facet |
530 Physics |
description |
Bursts of carbon dioxide, released into the atmosphere and occurring on centennial time scales, were seen during the cold periods of the last glacial cycle but not in older or warmer conditions. Nehrbass-Ahles et al. present a record of atmospheric carbon dioxide concentrations retrieved from the European Project for Ice Coring in Antarctica Dome C ice core showing that these carbon dioxide jumps occurred during both cold and warm periods between 330,000 and 450,000 years ago. They relate these pulses to disruptions of the Atlantic meridional overturning circulation caused by freshwater discharge from ice sheets. Such rapid carbon dioxide increases could occur in the future if global warming also disrupts this ocean circulation pattern.Science, this issue p. 1000Pulse-like carbon dioxide release to the atmosphere on centennial time scales has only been identified for the most recent glacial and deglacial periods and is thought to be absent during warmer climate conditions. Here, we present a high-resolution carbon dioxide record from 330,000 to 450,000 years before present, revealing pronounced carbon dioxide jumps (CDJ) under cold and warm climate conditions. CDJ come in two varieties that we attribute to invigoration or weakening of the Atlantic meridional overturning circulation (AMOC) and associated northward and southward shifts of the intertropical convergence zone, respectively. We find that CDJ are pervasive features of the carbon cycle that can occur during interglacial climate conditions if land ice masses are sufficiently extended to be able to disturb the AMOC by freshwater input. |
format |
Article in Journal/Newspaper |
author |
Nehrbass-Ahles, C. Shin, J. Schmitt, J. Bereiter, B. Joos, F. Schilt, A. Schmidely, L. Silva, L. Teste, G. Grilli, R. Chappellaz, J. Hodell, D. Fischer, H. Stocker, T.F. |
author_facet |
Nehrbass-Ahles, C. Shin, J. Schmitt, J. Bereiter, B. Joos, F. Schilt, A. Schmidely, L. Silva, L. Teste, G. Grilli, R. Chappellaz, J. Hodell, D. Fischer, H. Stocker, T.F. |
author_sort |
Nehrbass-Ahles, C. |
title |
Abrupt CO2 release to the atmosphere under glacial and early interglacial climate conditions |
title_short |
Abrupt CO2 release to the atmosphere under glacial and early interglacial climate conditions |
title_full |
Abrupt CO2 release to the atmosphere under glacial and early interglacial climate conditions |
title_fullStr |
Abrupt CO2 release to the atmosphere under glacial and early interglacial climate conditions |
title_full_unstemmed |
Abrupt CO2 release to the atmosphere under glacial and early interglacial climate conditions |
title_sort |
abrupt co2 release to the atmosphere under glacial and early interglacial climate conditions |
publisher |
American Association for the Advancement of Science |
publishDate |
2020 |
url |
https://boris.unibe.ch/153002/1/nehrbass20sci_1000.full.pdf https://boris.unibe.ch/153002/8/nehrbassahles20scipreprint.pdf https://boris.unibe.ch/153002/ |
genre |
Antarc* Antarctica ice core |
genre_facet |
Antarc* Antarctica ice core |
op_source |
Nehrbass-Ahles, C.; Shin, J.; Schmitt, J.; Bereiter, B.; Joos, F.; Schilt, A.; Schmidely, L.; Silva, L.; Teste, G.; Grilli, R.; Chappellaz, J.; Hodell, D.; Fischer, H.; Stocker, T.F. (2020). Abrupt CO2 release to the atmosphere under glacial and early interglacial climate conditions. Science, 369(6506), pp. 1000-1005. American Association for the Advancement of Science 10.1126/science.aay8178 <http://dx.doi.org/10.1126/science.aay8178> |
op_relation |
https://boris.unibe.ch/153002/ |
op_rights |
info:eu-repo/semantics/restrictedAccess info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1126/science.aay8178 |
container_title |
Science |
container_volume |
369 |
container_issue |
6506 |
container_start_page |
1000 |
op_container_end_page |
1005 |
_version_ |
1774715902577606656 |