THE LONG-TERM ICE CORE RECORD OF CO2 AND OTHER GREENHOUSE GASES
International audience Nature has been continuously sampling the atmosphere at the surface of Antarctica throughout the ages. Atmospheric gases trapped in Antarctic ice provide the most direct record of past changes in greenhouse gas levels during the past 800,000 years. The best-documented and reli...
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ftunivnantes:oai:HAL:hal-03082021v1 2023-05-15T13:44:13+02:00 THE LONG-TERM ICE CORE RECORD OF CO2 AND OTHER GREENHOUSE GASES Raynaud, Dominique Beeman, Jai Chowdhry Chappellaz, Jérome Parrenin, F. Shin, Jinhwa Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) 2020-06-04 https://hal.science/hal-03082021 https://hal.science/hal-03082021/document https://hal.science/hal-03082021/file/CH0002_Raynaud_v2-WithFigures.pdf en eng HAL CCSD hal-03082021 https://hal.science/hal-03082021 https://hal.science/hal-03082021/document https://hal.science/hal-03082021/file/CH0002_Raynaud_v2-WithFigures.pdf info:eu-repo/semantics/OpenAccess Past Antarctica: Paleoclimatology and Climate Change https://hal.science/hal-03082021 Past Antarctica: Paleoclimatology and Climate Change, 2020 Arrhenius prediction ice core record of greenhouse gases carbon dioxide record glacial-interglacial cycles ice age interglacial periods paleo-climate forcing the last deglaciation Antarctica air bubbles in ice [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/bookPart Book sections 2020 ftunivnantes 2023-03-01T02:47:04Z International audience Nature has been continuously sampling the atmosphere at the surface of Antarctica throughout the ages. Atmospheric gases trapped in Antarctic ice provide the most direct record of past changes in greenhouse gas levels during the past 800,000 years. The best-documented and reliable trace-gas records are for CO 2 and CH 4, and Antarctic ice is the key player in recording past atmospheric CO 2 . They are archives of the past and a window to present and future of the interplay between greenhouse gases and climate. We discuss the pioneering work of glaciologists measuring CO 2 in the air extracted from Antarctic ice, which confirmed Arrhenius’ prediction about the role of atmospheric carbon dioxide in ice age climate. We detail here how the ice core record has been progressively extended to 4 and then to 8 glacial-interglacial cycles, i.e. over the last 800,000 years. The Antarctic ice record highlights the tight coupling between atmospheric CO 2 and Antarctic climate on the timescales of glacial-interglacial cycles for the entire 800,000 year interval. This close linkage suggests that glacial-interglacial variations of CO 2 explain a large fraction of glacial-interglacial climate changes observed in the Antarctic ice record, which is consistent with modelling results. We present more recent works showing a near synchronous phasing between Antarctic temperature and CO 2 during the last deglaciation and pinpointing the important role of oceanic circulation in both heat transport and CO 2 outgassing. We also explore shortly the prospect for investigating Antarctic ice older than one million years to document what isoften called the enigma of the Mid-Pleistocene transition around one million years ago. Book Part Antarc* Antarctic Antarctica ice core Université de Nantes: HAL-UNIV-NANTES Antarctic The Antarctic |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Arrhenius prediction ice core record of greenhouse gases carbon dioxide record glacial-interglacial cycles ice age interglacial periods paleo-climate forcing the last deglaciation Antarctica air bubbles in ice [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
Arrhenius prediction ice core record of greenhouse gases carbon dioxide record glacial-interglacial cycles ice age interglacial periods paleo-climate forcing the last deglaciation Antarctica air bubbles in ice [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Raynaud, Dominique Beeman, Jai Chowdhry Chappellaz, Jérome Parrenin, F. Shin, Jinhwa THE LONG-TERM ICE CORE RECORD OF CO2 AND OTHER GREENHOUSE GASES |
topic_facet |
Arrhenius prediction ice core record of greenhouse gases carbon dioxide record glacial-interglacial cycles ice age interglacial periods paleo-climate forcing the last deglaciation Antarctica air bubbles in ice [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Nature has been continuously sampling the atmosphere at the surface of Antarctica throughout the ages. Atmospheric gases trapped in Antarctic ice provide the most direct record of past changes in greenhouse gas levels during the past 800,000 years. The best-documented and reliable trace-gas records are for CO 2 and CH 4, and Antarctic ice is the key player in recording past atmospheric CO 2 . They are archives of the past and a window to present and future of the interplay between greenhouse gases and climate. We discuss the pioneering work of glaciologists measuring CO 2 in the air extracted from Antarctic ice, which confirmed Arrhenius’ prediction about the role of atmospheric carbon dioxide in ice age climate. We detail here how the ice core record has been progressively extended to 4 and then to 8 glacial-interglacial cycles, i.e. over the last 800,000 years. The Antarctic ice record highlights the tight coupling between atmospheric CO 2 and Antarctic climate on the timescales of glacial-interglacial cycles for the entire 800,000 year interval. This close linkage suggests that glacial-interglacial variations of CO 2 explain a large fraction of glacial-interglacial climate changes observed in the Antarctic ice record, which is consistent with modelling results. We present more recent works showing a near synchronous phasing between Antarctic temperature and CO 2 during the last deglaciation and pinpointing the important role of oceanic circulation in both heat transport and CO 2 outgassing. We also explore shortly the prospect for investigating Antarctic ice older than one million years to document what isoften called the enigma of the Mid-Pleistocene transition around one million years ago. |
author2 |
Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) |
format |
Book Part |
author |
Raynaud, Dominique Beeman, Jai Chowdhry Chappellaz, Jérome Parrenin, F. Shin, Jinhwa |
author_facet |
Raynaud, Dominique Beeman, Jai Chowdhry Chappellaz, Jérome Parrenin, F. Shin, Jinhwa |
author_sort |
Raynaud, Dominique |
title |
THE LONG-TERM ICE CORE RECORD OF CO2 AND OTHER GREENHOUSE GASES |
title_short |
THE LONG-TERM ICE CORE RECORD OF CO2 AND OTHER GREENHOUSE GASES |
title_full |
THE LONG-TERM ICE CORE RECORD OF CO2 AND OTHER GREENHOUSE GASES |
title_fullStr |
THE LONG-TERM ICE CORE RECORD OF CO2 AND OTHER GREENHOUSE GASES |
title_full_unstemmed |
THE LONG-TERM ICE CORE RECORD OF CO2 AND OTHER GREENHOUSE GASES |
title_sort |
long-term ice core record of co2 and other greenhouse gases |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03082021 https://hal.science/hal-03082021/document https://hal.science/hal-03082021/file/CH0002_Raynaud_v2-WithFigures.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica ice core |
op_source |
Past Antarctica: Paleoclimatology and Climate Change https://hal.science/hal-03082021 Past Antarctica: Paleoclimatology and Climate Change, 2020 |
op_relation |
hal-03082021 https://hal.science/hal-03082021 https://hal.science/hal-03082021/document https://hal.science/hal-03082021/file/CH0002_Raynaud_v2-WithFigures.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766198850076278784 |