Carbon isotope constraints on the deglacial CO2 rise from ice cores
The stable carbon isotope ratio of atmospheric CO2 (δ13Catm) is a key parameter in deciphering past carbon cycle changes. Here we present δ13Catm data for the past 24,000 years derived from three independent records from two Antarctic ice cores. We conclude that a pronounced 0.3 per mil decrease in...
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2022
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Online Access: | https://doi.org/10.1126/science.1217161 http://infoscience.epfl.ch/record/298287 |
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ftinfoscience:oai:infoscience.epfl.ch:298287 2023-05-15T13:43:17+02:00 Carbon isotope constraints on the deglacial CO2 rise from ice cores Schmitt, Jochen Schneider, Robert Elsig, Joachim Leuenberger, Daiana Lourantou, Anna Chappellaz, Jerome Koehler, Peter Joos, Fortunat Stocker, Thomas F. Leuenberger, Markus Fischer, Hubertus 2022-11-23T16:11:08Z https://doi.org/10.1126/science.1217161 http://infoscience.epfl.ch/record/298287 unknown Washington, American Association for the Advancement of Science (AAAS) doi:10.1126/science.1217161 isi:000303872300047 http://infoscience.epfl.ch/record/298287 http://infoscience.epfl.ch/record/298287 Text 2022 ftinfoscience https://doi.org/10.1126/science.1217161 2023-02-13T23:12:29Z The stable carbon isotope ratio of atmospheric CO2 (δ13Catm) is a key parameter in deciphering past carbon cycle changes. Here we present δ13Catm data for the past 24,000 years derived from three independent records from two Antarctic ice cores. We conclude that a pronounced 0.3 per mil decrease in δ13Catm during the early deglaciation can be best explained by upwelling of old, carbon-enriched waters in the Southern Ocean. Later in the deglaciation, regrowth of the terrestrial biosphere, changes in sea surface temperature, and ocean circulation governed the δ 13Catmevolution. During the Last Glacial Maximum, δ13Catm and atmospheric CO2 concentration were essentially constant, which suggests that the carbon cycle was in dynamic equilibrium and that the net transfer of carbon to the deep ocean had occurred before then. Text Antarc* Antarctic Southern Ocean EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) Antarctic Southern Ocean Science 336 6082 711 714 |
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EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) |
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ftinfoscience |
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unknown |
description |
The stable carbon isotope ratio of atmospheric CO2 (δ13Catm) is a key parameter in deciphering past carbon cycle changes. Here we present δ13Catm data for the past 24,000 years derived from three independent records from two Antarctic ice cores. We conclude that a pronounced 0.3 per mil decrease in δ13Catm during the early deglaciation can be best explained by upwelling of old, carbon-enriched waters in the Southern Ocean. Later in the deglaciation, regrowth of the terrestrial biosphere, changes in sea surface temperature, and ocean circulation governed the δ 13Catmevolution. During the Last Glacial Maximum, δ13Catm and atmospheric CO2 concentration were essentially constant, which suggests that the carbon cycle was in dynamic equilibrium and that the net transfer of carbon to the deep ocean had occurred before then. |
format |
Text |
author |
Schmitt, Jochen Schneider, Robert Elsig, Joachim Leuenberger, Daiana Lourantou, Anna Chappellaz, Jerome Koehler, Peter Joos, Fortunat Stocker, Thomas F. Leuenberger, Markus Fischer, Hubertus |
spellingShingle |
Schmitt, Jochen Schneider, Robert Elsig, Joachim Leuenberger, Daiana Lourantou, Anna Chappellaz, Jerome Koehler, Peter Joos, Fortunat Stocker, Thomas F. Leuenberger, Markus Fischer, Hubertus Carbon isotope constraints on the deglacial CO2 rise from ice cores |
author_facet |
Schmitt, Jochen Schneider, Robert Elsig, Joachim Leuenberger, Daiana Lourantou, Anna Chappellaz, Jerome Koehler, Peter Joos, Fortunat Stocker, Thomas F. Leuenberger, Markus Fischer, Hubertus |
author_sort |
Schmitt, Jochen |
title |
Carbon isotope constraints on the deglacial CO2 rise from ice cores |
title_short |
Carbon isotope constraints on the deglacial CO2 rise from ice cores |
title_full |
Carbon isotope constraints on the deglacial CO2 rise from ice cores |
title_fullStr |
Carbon isotope constraints on the deglacial CO2 rise from ice cores |
title_full_unstemmed |
Carbon isotope constraints on the deglacial CO2 rise from ice cores |
title_sort |
carbon isotope constraints on the deglacial co2 rise from ice cores |
publisher |
Washington, American Association for the Advancement of Science (AAAS) |
publishDate |
2022 |
url |
https://doi.org/10.1126/science.1217161 http://infoscience.epfl.ch/record/298287 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
http://infoscience.epfl.ch/record/298287 |
op_relation |
doi:10.1126/science.1217161 isi:000303872300047 http://infoscience.epfl.ch/record/298287 |
op_doi |
https://doi.org/10.1126/science.1217161 |
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Science |
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714 |
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1766186777902579712 |