Synchronisation of the EDML and EDC ice cores for the last 52 kyr by volcanic signature matching
International audience A common time scale for the EPICA ice cores from Dome C (EDC) and Dronning Maud Land (EDML) has been established. Since the EDML core was not drilled on a dome, the development of the EDML1 time scale for the EPICA ice core drilled in Dronning Maud Land was based on the creati...
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Other Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2007
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Online Access: | https://hal.science/hal-00330758 https://hal.science/hal-00330758/document https://hal.science/hal-00330758/file/cp-3-367-2007.pdf |
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ftunivsavoie:oai:HAL:hal-00330758v1 |
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Open Polar |
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Université Savoie Mont Blanc: HAL |
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ftunivsavoie |
language |
English |
topic |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Severi, M. Becagli, S. Castellano, E. Morganti, A. Traversi, R. Udisti, R. Ruth, U. Fischer, H. Huybrechts, P. Wolff, E. Parrenin, F. Kaufmann, P. Lambert, F. Steffensen, J. P. Synchronisation of the EDML and EDC ice cores for the last 52 kyr by volcanic signature matching |
topic_facet |
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience A common time scale for the EPICA ice cores from Dome C (EDC) and Dronning Maud Land (EDML) has been established. Since the EDML core was not drilled on a dome, the development of the EDML1 time scale for the EPICA ice core drilled in Dronning Maud Land was based on the creation of a detailed stratigraphic link between EDML and EDC, which was dated by a simpler 1D ice-flow model. The synchronisation between the two EPICA ice cores was done through the identification of several common volcanic signatures. This paper describes the rigorous method, using the signature of volcanic sulfate, which was employed for the last 52 kyr of the record. We estimated the discrepancies between the modelled EDC and EDML glaciological age scales during the studied period, by evaluating the ratio R of the apparent duration of temporal intervals between pairs of isochrones. On average R ranges between 0.8 and 1.2 corresponding to an uncertainty of up to 20% in the estimate of the time duration in at least one of the two ice cores. Significant deviations of R up to 1.4–1.5 are observed between 18 and 28 kyr before present (BP), where present is defined as 1950. At this stage our approach does not allow us unequivocally to find out which of the models is affected by errors, but assuming that the thinning function at both sites and accumulation history at Dome C (which was drilled on a dome) are correct, this anomaly can be ascribed to a complex spatial accumulation variability (which may be different in the past compared to the present day) upstream of the EDML core. |
author2 |
Department of Chemistry Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association Departement Geografie British Antarctic Survey (BAS) Natural Environment Research Council (NERC) 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) Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern / University of Bern (UNIBE)-Universität Bern / University of Bern (UNIBE) Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) |
format |
Article in Journal/Newspaper |
author |
Severi, M. Becagli, S. Castellano, E. Morganti, A. Traversi, R. Udisti, R. Ruth, U. Fischer, H. Huybrechts, P. Wolff, E. Parrenin, F. Kaufmann, P. Lambert, F. Steffensen, J. P. |
author_facet |
Severi, M. Becagli, S. Castellano, E. Morganti, A. Traversi, R. Udisti, R. Ruth, U. Fischer, H. Huybrechts, P. Wolff, E. Parrenin, F. Kaufmann, P. Lambert, F. Steffensen, J. P. |
author_sort |
Severi, M. |
title |
Synchronisation of the EDML and EDC ice cores for the last 52 kyr by volcanic signature matching |
title_short |
Synchronisation of the EDML and EDC ice cores for the last 52 kyr by volcanic signature matching |
title_full |
Synchronisation of the EDML and EDC ice cores for the last 52 kyr by volcanic signature matching |
title_fullStr |
Synchronisation of the EDML and EDC ice cores for the last 52 kyr by volcanic signature matching |
title_full_unstemmed |
Synchronisation of the EDML and EDC ice cores for the last 52 kyr by volcanic signature matching |
title_sort |
synchronisation of the edml and edc ice cores for the last 52 kyr by volcanic signature matching |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00330758 https://hal.science/hal-00330758/document https://hal.science/hal-00330758/file/cp-3-367-2007.pdf |
genre |
Dronning Maud Land EPICA ice core |
genre_facet |
Dronning Maud Land EPICA ice core |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-00330758 Climate of the Past, 2007, 3 (3), pp.367-374 |
op_relation |
hal-00330758 https://hal.science/hal-00330758 https://hal.science/hal-00330758/document https://hal.science/hal-00330758/file/cp-3-367-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1797581948788408320 |
spelling |
ftunivsavoie:oai:HAL:hal-00330758v1 2024-04-28T08:17:13+00:00 Synchronisation of the EDML and EDC ice cores for the last 52 kyr by volcanic signature matching Severi, M. Becagli, S. Castellano, E. Morganti, A. Traversi, R. Udisti, R. Ruth, U. Fischer, H. Huybrechts, P. Wolff, E. Parrenin, F. Kaufmann, P. Lambert, F. Steffensen, J. P. Department of Chemistry Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association Departement Geografie British Antarctic Survey (BAS) Natural Environment Research Council (NERC) 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) Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern / University of Bern (UNIBE)-Universität Bern / University of Bern (UNIBE) Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) 2007-07-02 https://hal.science/hal-00330758 https://hal.science/hal-00330758/document https://hal.science/hal-00330758/file/cp-3-367-2007.pdf en eng HAL CCSD European Geosciences Union (EGU) hal-00330758 https://hal.science/hal-00330758 https://hal.science/hal-00330758/document https://hal.science/hal-00330758/file/cp-3-367-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-00330758 Climate of the Past, 2007, 3 (3), pp.367-374 [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2007 ftunivsavoie 2024-04-11T00:40:51Z International audience A common time scale for the EPICA ice cores from Dome C (EDC) and Dronning Maud Land (EDML) has been established. Since the EDML core was not drilled on a dome, the development of the EDML1 time scale for the EPICA ice core drilled in Dronning Maud Land was based on the creation of a detailed stratigraphic link between EDML and EDC, which was dated by a simpler 1D ice-flow model. The synchronisation between the two EPICA ice cores was done through the identification of several common volcanic signatures. This paper describes the rigorous method, using the signature of volcanic sulfate, which was employed for the last 52 kyr of the record. We estimated the discrepancies between the modelled EDC and EDML glaciological age scales during the studied period, by evaluating the ratio R of the apparent duration of temporal intervals between pairs of isochrones. On average R ranges between 0.8 and 1.2 corresponding to an uncertainty of up to 20% in the estimate of the time duration in at least one of the two ice cores. Significant deviations of R up to 1.4–1.5 are observed between 18 and 28 kyr before present (BP), where present is defined as 1950. At this stage our approach does not allow us unequivocally to find out which of the models is affected by errors, but assuming that the thinning function at both sites and accumulation history at Dome C (which was drilled on a dome) are correct, this anomaly can be ascribed to a complex spatial accumulation variability (which may be different in the past compared to the present day) upstream of the EDML core. Article in Journal/Newspaper Dronning Maud Land EPICA ice core Université Savoie Mont Blanc: HAL |