A late-glacial high-resolution site and source temperature record derived from the EPICA Dome C isotope records (East Antarctica)
The timing and synchronisation of Greenland and Antarctic climate events that occurred during the last glacial period are still under debate, as is the magnitude of temperature change associated with these events. Here we present detailed records of local and moisture-source temperature changes span...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/171077 2023-05-15T13:46:28+02:00 A late-glacial high-resolution site and source temperature record derived from the EPICA Dome C isotope records (East Antarctica) Stenni, Barbara Jouzel, Jean Masson-Delmotte, V. Röthlisberger, Regine Castellano, Emiliano Cattani, Olivier Falourd, Sonia Johnsen, S.J. Longinelli, Antonio Sachs, Julian Selmo, Enricomaria Souchez, Roland Steffensen, Jørgen Peder Udisti, Roberto 2004-01 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/171077 https://dipot.ulb.ac.be/dspace/bitstream/2013/171077/1/Elsevier_154707.pdf en eng uri/info:doi/10.1016/S0012-821X(03)00574-0 uri/info:scp/0347596724 https://dipot.ulb.ac.be/dspace/bitstream/2013/171077/1/Elsevier_154707.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/171077 1 full-text file(s): info:eu-repo/semantics/restrictedAccess Earth and planetary science letters, 217 (1-2 Sciences de l'espace Géographie physique Pétrologie Géochimie Sciences de la terre et du cosmos Deuterium Deuterium excess East Antarctica Ice cores Site temperature Source temperature info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2004 ftunivbruxelles 2022-06-12T21:04:17Z The timing and synchronisation of Greenland and Antarctic climate events that occurred during the last glacial period are still under debate, as is the magnitude of temperature change associated with these events. Here we present detailed records of local and moisture-source temperature changes spanning the period 27-45 kyr BP from water stable isotope measurements (δD and δ18O) in the recently drilled EPICA Dome C ice core, East Antarctic plateau. Using a simple isotopic model, site (Δ T site) and source (Δ T source) temperatures are extracted from the initial 50-yr high-resolution isotopic records, taking into account the changes in seawater isotopic composition. The deuterium isotope variability is very similar to the less precise δD record from the Vostok ice core, and the site temperature inversion leads to a temperature profile similar to the classical palaeothermometry method, due to compensations between source and ocean water corrections. The reconstructed Δ T site and Δ T source profiles show different trends during the glacial: the former shows a decreasing trend from the warm A1 event (38 kyr BP) toward the Last Glacial Maximum, while the latter shows increasing values from 41 to 28 kyr BP. The low-frequency deuterium excess fluctuations are strongly influenced by obliquity fluctuations, controlling the low- to high-latitude temperature gradients, and show a remarkable similarity with a high-resolution southeast Atlantic sea surface temperature record. A comparison of the temperature profiles (site and source) and temperature gradient (Δ T source-Δ T site) with the non-sea-salt calcium and sodium records suggests a secondary influence of atmospheric transport changes on aerosol variations. © 2003 Elsevier B.V. All rights reserved. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica EPICA Greenland ice core DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Antarctic East Antarctica Greenland |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences de l'espace Géographie physique Pétrologie Géochimie Sciences de la terre et du cosmos Deuterium Deuterium excess East Antarctica Ice cores Site temperature Source temperature |
spellingShingle |
Sciences de l'espace Géographie physique Pétrologie Géochimie Sciences de la terre et du cosmos Deuterium Deuterium excess East Antarctica Ice cores Site temperature Source temperature Stenni, Barbara Jouzel, Jean Masson-Delmotte, V. Röthlisberger, Regine Castellano, Emiliano Cattani, Olivier Falourd, Sonia Johnsen, S.J. Longinelli, Antonio Sachs, Julian Selmo, Enricomaria Souchez, Roland Steffensen, Jørgen Peder Udisti, Roberto A late-glacial high-resolution site and source temperature record derived from the EPICA Dome C isotope records (East Antarctica) |
topic_facet |
Sciences de l'espace Géographie physique Pétrologie Géochimie Sciences de la terre et du cosmos Deuterium Deuterium excess East Antarctica Ice cores Site temperature Source temperature |
description |
The timing and synchronisation of Greenland and Antarctic climate events that occurred during the last glacial period are still under debate, as is the magnitude of temperature change associated with these events. Here we present detailed records of local and moisture-source temperature changes spanning the period 27-45 kyr BP from water stable isotope measurements (δD and δ18O) in the recently drilled EPICA Dome C ice core, East Antarctic plateau. Using a simple isotopic model, site (Δ T site) and source (Δ T source) temperatures are extracted from the initial 50-yr high-resolution isotopic records, taking into account the changes in seawater isotopic composition. The deuterium isotope variability is very similar to the less precise δD record from the Vostok ice core, and the site temperature inversion leads to a temperature profile similar to the classical palaeothermometry method, due to compensations between source and ocean water corrections. The reconstructed Δ T site and Δ T source profiles show different trends during the glacial: the former shows a decreasing trend from the warm A1 event (38 kyr BP) toward the Last Glacial Maximum, while the latter shows increasing values from 41 to 28 kyr BP. The low-frequency deuterium excess fluctuations are strongly influenced by obliquity fluctuations, controlling the low- to high-latitude temperature gradients, and show a remarkable similarity with a high-resolution southeast Atlantic sea surface temperature record. A comparison of the temperature profiles (site and source) and temperature gradient (Δ T source-Δ T site) with the non-sea-salt calcium and sodium records suggests a secondary influence of atmospheric transport changes on aerosol variations. © 2003 Elsevier B.V. All rights reserved. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Stenni, Barbara Jouzel, Jean Masson-Delmotte, V. Röthlisberger, Regine Castellano, Emiliano Cattani, Olivier Falourd, Sonia Johnsen, S.J. Longinelli, Antonio Sachs, Julian Selmo, Enricomaria Souchez, Roland Steffensen, Jørgen Peder Udisti, Roberto |
author_facet |
Stenni, Barbara Jouzel, Jean Masson-Delmotte, V. Röthlisberger, Regine Castellano, Emiliano Cattani, Olivier Falourd, Sonia Johnsen, S.J. Longinelli, Antonio Sachs, Julian Selmo, Enricomaria Souchez, Roland Steffensen, Jørgen Peder Udisti, Roberto |
author_sort |
Stenni, Barbara |
title |
A late-glacial high-resolution site and source temperature record derived from the EPICA Dome C isotope records (East Antarctica) |
title_short |
A late-glacial high-resolution site and source temperature record derived from the EPICA Dome C isotope records (East Antarctica) |
title_full |
A late-glacial high-resolution site and source temperature record derived from the EPICA Dome C isotope records (East Antarctica) |
title_fullStr |
A late-glacial high-resolution site and source temperature record derived from the EPICA Dome C isotope records (East Antarctica) |
title_full_unstemmed |
A late-glacial high-resolution site and source temperature record derived from the EPICA Dome C isotope records (East Antarctica) |
title_sort |
late-glacial high-resolution site and source temperature record derived from the epica dome c isotope records (east antarctica) |
publishDate |
2004 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/171077 https://dipot.ulb.ac.be/dspace/bitstream/2013/171077/1/Elsevier_154707.pdf |
geographic |
Antarctic East Antarctica Greenland |
geographic_facet |
Antarctic East Antarctica Greenland |
genre |
Antarc* Antarctic Antarctica East Antarctica EPICA Greenland ice core |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica EPICA Greenland ice core |
op_source |
Earth and planetary science letters, 217 (1-2 |
op_relation |
uri/info:doi/10.1016/S0012-821X(03)00574-0 uri/info:scp/0347596724 https://dipot.ulb.ac.be/dspace/bitstream/2013/171077/1/Elsevier_154707.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/171077 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/restrictedAccess |
_version_ |
1766243116355944448 |