Reconciling glacial Antarctic water stable isotopes with ice sheet topography and the isotopic paleothermometer
Stable water isotope records from Antarctica are key for our understanding of Quaternary climate variations. However, the exact quantitative interpretation of these important climate proxy records in terms of surface temperature, ice sheet height and other climatic changes is still a matter of debat...
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Online Access: | https://oceanrep.geomar.de/id/eprint/44268/ https://oceanrep.geomar.de/id/eprint/44268/1/s41467-018-05430-y.pdf https://doi.org/10.1038/s41467-018-05430-y |
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ftoceanrep:oai:oceanrep.geomar.de:44268 2023-05-15T13:37:37+02:00 Reconciling glacial Antarctic water stable isotopes with ice sheet topography and the isotopic paleothermometer Werner, Martin Jouzel, Jean Masson-Delmotte, Valérie Lohmann, Gerrit 2018-08-30 text https://oceanrep.geomar.de/id/eprint/44268/ https://oceanrep.geomar.de/id/eprint/44268/1/s41467-018-05430-y.pdf https://doi.org/10.1038/s41467-018-05430-y en eng Nature Research https://oceanrep.geomar.de/id/eprint/44268/1/s41467-018-05430-y.pdf Werner, M., Jouzel, J., Masson-Delmotte, V. and Lohmann, G. (2018) Reconciling glacial Antarctic water stable isotopes with ice sheet topography and the isotopic paleothermometer. Open Access Nature Communications, 9 (1). Art.Nr. 3537. DOI 10.1038/s41467-018-05430-y <https://doi.org/10.1038/s41467-018-05430-y>. doi:10.1038/s41467-018-05430-y cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2018 ftoceanrep https://doi.org/10.1038/s41467-018-05430-y 2023-04-07T15:41:22Z Stable water isotope records from Antarctica are key for our understanding of Quaternary climate variations. However, the exact quantitative interpretation of these important climate proxy records in terms of surface temperature, ice sheet height and other climatic changes is still a matter of debate. Here we report results obtained with an atmospheric general circulation model equipped with water isotopes, run at a high-spatial horizontal resolution of one-by-one degree. Comparing different glacial maximum ice sheet reconstructions, a best model data match is achieved for the PMIP3 reconstruction. Reduced West Antarctic elevation changes between 400 and 800 m lead to further improved agreement with ice core data. Our modern and glacial climate simulations support the validity of the isotopic paleothermometer approach based on the use of present-day observations and reveal that a glacial ocean state as displayed in the GLAMAP reconstruction is suitable for capturing the observed glacial isotope changes in Antarctic ice cores. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Ice Sheet OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Nature Communications 9 1 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Stable water isotope records from Antarctica are key for our understanding of Quaternary climate variations. However, the exact quantitative interpretation of these important climate proxy records in terms of surface temperature, ice sheet height and other climatic changes is still a matter of debate. Here we report results obtained with an atmospheric general circulation model equipped with water isotopes, run at a high-spatial horizontal resolution of one-by-one degree. Comparing different glacial maximum ice sheet reconstructions, a best model data match is achieved for the PMIP3 reconstruction. Reduced West Antarctic elevation changes between 400 and 800 m lead to further improved agreement with ice core data. Our modern and glacial climate simulations support the validity of the isotopic paleothermometer approach based on the use of present-day observations and reveal that a glacial ocean state as displayed in the GLAMAP reconstruction is suitable for capturing the observed glacial isotope changes in Antarctic ice cores. |
format |
Article in Journal/Newspaper |
author |
Werner, Martin Jouzel, Jean Masson-Delmotte, Valérie Lohmann, Gerrit |
spellingShingle |
Werner, Martin Jouzel, Jean Masson-Delmotte, Valérie Lohmann, Gerrit Reconciling glacial Antarctic water stable isotopes with ice sheet topography and the isotopic paleothermometer |
author_facet |
Werner, Martin Jouzel, Jean Masson-Delmotte, Valérie Lohmann, Gerrit |
author_sort |
Werner, Martin |
title |
Reconciling glacial Antarctic water stable isotopes with ice sheet topography and the isotopic paleothermometer |
title_short |
Reconciling glacial Antarctic water stable isotopes with ice sheet topography and the isotopic paleothermometer |
title_full |
Reconciling glacial Antarctic water stable isotopes with ice sheet topography and the isotopic paleothermometer |
title_fullStr |
Reconciling glacial Antarctic water stable isotopes with ice sheet topography and the isotopic paleothermometer |
title_full_unstemmed |
Reconciling glacial Antarctic water stable isotopes with ice sheet topography and the isotopic paleothermometer |
title_sort |
reconciling glacial antarctic water stable isotopes with ice sheet topography and the isotopic paleothermometer |
publisher |
Nature Research |
publishDate |
2018 |
url |
https://oceanrep.geomar.de/id/eprint/44268/ https://oceanrep.geomar.de/id/eprint/44268/1/s41467-018-05430-y.pdf https://doi.org/10.1038/s41467-018-05430-y |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica ice core Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica ice core Ice Sheet |
op_relation |
https://oceanrep.geomar.de/id/eprint/44268/1/s41467-018-05430-y.pdf Werner, M., Jouzel, J., Masson-Delmotte, V. and Lohmann, G. (2018) Reconciling glacial Antarctic water stable isotopes with ice sheet topography and the isotopic paleothermometer. Open Access Nature Communications, 9 (1). Art.Nr. 3537. DOI 10.1038/s41467-018-05430-y <https://doi.org/10.1038/s41467-018-05430-y>. doi:10.1038/s41467-018-05430-y |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-018-05430-y |
container_title |
Nature Communications |
container_volume |
9 |
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1 |
_version_ |
1766095012065443840 |