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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Published in:Science
Main Authors: Schmitt, Jochen, Schneider, Robert, Elsig, Joachim, Leuenberger, Daiana, Lourantou, Anna, Chappellaz, Jerome, Koehler, Peter, Joos, Fortunat, Stocker, Thomas F., Leuenberger, Markus, Fischer, Hubertus
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Published: Washington, American Association for the Advancement of Science (AAAS) 2022
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Online Access:https://doi.org/10.1126/science.1217161
http://infoscience.epfl.ch/record/298287
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spelling 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
institution Open Polar
collection EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne)
op_collection_id ftinfoscience
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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
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http://infoscience.epfl.ch/record/298287
op_doi https://doi.org/10.1126/science.1217161
container_title Science
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