Supporting evidence from the EPICA Dronning Maud Land ice core for atmospheric CO2 changes during the past millennium
International audience The most direct method of investigating past variations of the atmospheric CO2 concentration before 1958, when continuous direct atmospheric CO2 measurements started, is the analysis of air extracted from suitable ice cores. Here we present a new detailed CO2 record from the D...
Published in: | Tellus B |
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Main Authors: | , , , , , , , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2005
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Online Access: | https://insu.hal.science/insu-00374931 https://insu.hal.science/insu-00374931/document https://insu.hal.science/insu-00374931/file/Supporting%20evidence%20from%20the%20EPICA%20Dronning%20Maud%20Land%20ice%20core%20for%20atmospheric%20CO2%20changes%20during%20the%20past%20millennium.pdf https://doi.org/10.1111/j.1600-0889.2005.00131.x |
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Université Savoie Mont Blanc: HAL |
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language |
English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Siegenthaler, Urs Monnin, Eric Kawamura, Kenji Spahni, Renato Schwander, Jakob Stauffer, Bernard Stocker, Thomas F. Barnola, Jean-Marc Fischer, Hubertus Supporting evidence from the EPICA Dronning Maud Land ice core for atmospheric CO2 changes during the past millennium |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience The most direct method of investigating past variations of the atmospheric CO2 concentration before 1958, when continuous direct atmospheric CO2 measurements started, is the analysis of air extracted from suitable ice cores. Here we present a new detailed CO2 record from the Dronning Maud Land (DML) ice core, drilled in the framework of the European Project for Ice Coring in Antarctica (EPICA) and some new measurements on a previously drilled ice core from the South Pole. The DML CO2 record shows an increase from about 278 to 282 parts per million by volume (ppmv) between ad 1000 and ad 1200 and a fairly continuous decrease to a mean value of about 277 ppmv around ad 1700. While the new South Pole measurements agree well with DML at the minimum at ad 1700 they are on average about 2 ppmv lower during the period ad 1000–1500. Published measurements from the coastal high-accumulation site Law Dome are considered as very reliable because of the reproducibility of the measurements, high temporal resolution and an accurate time scale. Other Antarctic ice cores could not, or only partly, reproduce the pre-industrial measurements from Law Dome. A comparison of the trends of DML and Law Dome shows a general agreement. However we should be able to rule out co-variations caused by the same artefact. Two possible effects are discussed, first production of CO2 by chemical reactions and second diffusion of dissolved air through the ice matrix into the bubbles. While the first effect cannot be totally excluded, comparison of the Law Dome and DML record shows that dissolved air diffusing to bubbles cannot be responsible for the pre-industrial variation. Therefore, the new record is not a proof of the Law Dome results but the first very strong support from an ice core of the Antarctic plateau. |
author2 |
Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern / University of Bern (UNIBE)-Universität Bern / University of Bern (UNIBE) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Abteilung Klinische Sozialmedizin, Berufs- und Umweltdermatologie Universität Heidelberg Heidelberg = Heidelberg University European Project for Ice Coring in Antarctica (EPICA) |
format |
Article in Journal/Newspaper |
author |
Siegenthaler, Urs Monnin, Eric Kawamura, Kenji Spahni, Renato Schwander, Jakob Stauffer, Bernard Stocker, Thomas F. Barnola, Jean-Marc Fischer, Hubertus |
author_facet |
Siegenthaler, Urs Monnin, Eric Kawamura, Kenji Spahni, Renato Schwander, Jakob Stauffer, Bernard Stocker, Thomas F. Barnola, Jean-Marc Fischer, Hubertus |
author_sort |
Siegenthaler, Urs |
title |
Supporting evidence from the EPICA Dronning Maud Land ice core for atmospheric CO2 changes during the past millennium |
title_short |
Supporting evidence from the EPICA Dronning Maud Land ice core for atmospheric CO2 changes during the past millennium |
title_full |
Supporting evidence from the EPICA Dronning Maud Land ice core for atmospheric CO2 changes during the past millennium |
title_fullStr |
Supporting evidence from the EPICA Dronning Maud Land ice core for atmospheric CO2 changes during the past millennium |
title_full_unstemmed |
Supporting evidence from the EPICA Dronning Maud Land ice core for atmospheric CO2 changes during the past millennium |
title_sort |
supporting evidence from the epica dronning maud land ice core for atmospheric co2 changes during the past millennium |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://insu.hal.science/insu-00374931 https://insu.hal.science/insu-00374931/document https://insu.hal.science/insu-00374931/file/Supporting%20evidence%20from%20the%20EPICA%20Dronning%20Maud%20Land%20ice%20core%20for%20atmospheric%20CO2%20changes%20during%20the%20past%20millennium.pdf https://doi.org/10.1111/j.1600-0889.2005.00131.x |
genre |
Antarc* Antarctic Antarctica DML Dronning Maud Land EPICA ice core South pole South pole |
genre_facet |
Antarc* Antarctic Antarctica DML Dronning Maud Land EPICA ice core South pole South pole |
op_source |
ISSN: 0280-6509 EISSN: 1600-0889 Tellus B - Chemical and Physical Meteorology https://insu.hal.science/insu-00374931 Tellus B - Chemical and Physical Meteorology, 2005, 57 (1), pp.51 à 57. ⟨10.1111/j.1600-0889.2005.00131.x⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1600-0889.2005.00131.x insu-00374931 https://insu.hal.science/insu-00374931 https://insu.hal.science/insu-00374931/document https://insu.hal.science/insu-00374931/file/Supporting%20evidence%20from%20the%20EPICA%20Dronning%20Maud%20Land%20ice%20core%20for%20atmospheric%20CO2%20changes%20during%20the%20past%20millennium.pdf doi:10.1111/j.1600-0889.2005.00131.x |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1111/j.1600-0889.2005.00131.x |
container_title |
Tellus B |
container_volume |
57 |
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1 |
container_start_page |
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ftunivsavoie:oai:HAL:insu-00374931v1 2024-04-28T08:00:17+00:00 Supporting evidence from the EPICA Dronning Maud Land ice core for atmospheric CO2 changes during the past millennium Siegenthaler, Urs Monnin, Eric Kawamura, Kenji Spahni, Renato Schwander, Jakob Stauffer, Bernard Stocker, Thomas F. Barnola, Jean-Marc Fischer, Hubertus Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern / University of Bern (UNIBE)-Universität Bern / University of Bern (UNIBE) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Abteilung Klinische Sozialmedizin, Berufs- und Umweltdermatologie Universität Heidelberg Heidelberg = Heidelberg University European Project for Ice Coring in Antarctica (EPICA) 2005 https://insu.hal.science/insu-00374931 https://insu.hal.science/insu-00374931/document https://insu.hal.science/insu-00374931/file/Supporting%20evidence%20from%20the%20EPICA%20Dronning%20Maud%20Land%20ice%20core%20for%20atmospheric%20CO2%20changes%20during%20the%20past%20millennium.pdf https://doi.org/10.1111/j.1600-0889.2005.00131.x en eng HAL CCSD Taylor & Francis info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1600-0889.2005.00131.x insu-00374931 https://insu.hal.science/insu-00374931 https://insu.hal.science/insu-00374931/document https://insu.hal.science/insu-00374931/file/Supporting%20evidence%20from%20the%20EPICA%20Dronning%20Maud%20Land%20ice%20core%20for%20atmospheric%20CO2%20changes%20during%20the%20past%20millennium.pdf doi:10.1111/j.1600-0889.2005.00131.x http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0280-6509 EISSN: 1600-0889 Tellus B - Chemical and Physical Meteorology https://insu.hal.science/insu-00374931 Tellus B - Chemical and Physical Meteorology, 2005, 57 (1), pp.51 à 57. ⟨10.1111/j.1600-0889.2005.00131.x⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 2005 ftunivsavoie https://doi.org/10.1111/j.1600-0889.2005.00131.x 2024-04-11T00:40:51Z International audience The most direct method of investigating past variations of the atmospheric CO2 concentration before 1958, when continuous direct atmospheric CO2 measurements started, is the analysis of air extracted from suitable ice cores. Here we present a new detailed CO2 record from the Dronning Maud Land (DML) ice core, drilled in the framework of the European Project for Ice Coring in Antarctica (EPICA) and some new measurements on a previously drilled ice core from the South Pole. The DML CO2 record shows an increase from about 278 to 282 parts per million by volume (ppmv) between ad 1000 and ad 1200 and a fairly continuous decrease to a mean value of about 277 ppmv around ad 1700. While the new South Pole measurements agree well with DML at the minimum at ad 1700 they are on average about 2 ppmv lower during the period ad 1000–1500. Published measurements from the coastal high-accumulation site Law Dome are considered as very reliable because of the reproducibility of the measurements, high temporal resolution and an accurate time scale. Other Antarctic ice cores could not, or only partly, reproduce the pre-industrial measurements from Law Dome. A comparison of the trends of DML and Law Dome shows a general agreement. However we should be able to rule out co-variations caused by the same artefact. Two possible effects are discussed, first production of CO2 by chemical reactions and second diffusion of dissolved air through the ice matrix into the bubbles. While the first effect cannot be totally excluded, comparison of the Law Dome and DML record shows that dissolved air diffusing to bubbles cannot be responsible for the pre-industrial variation. Therefore, the new record is not a proof of the Law Dome results but the first very strong support from an ice core of the Antarctic plateau. Article in Journal/Newspaper Antarc* Antarctic Antarctica DML Dronning Maud Land EPICA ice core South pole South pole Université Savoie Mont Blanc: HAL Tellus B 57 1 51 57 |