Evidence for obliquity forcing of glacial Termination II
International audience Variations in the intensity of high-latitude Northern Hemisphere summer insolation, driven largely by precession of the equinoxes, are widely thought to control the timing of Late Pleistocene glacial terminations. However, recently it has been suggested that changes in Earth...
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ftccsdartic:oai:HAL:hal-00437279v1 2023-05-15T17:31:29+02:00 Evidence for obliquity forcing of glacial Termination II Drysdale, R.N. Hellstrom, J. C. Zanchetta, G. Fallick, A. E. Sánchez Goñi, M. F. Couchoud, Isabelle McDonald, J. Maas, R. Lohmann, G. Isola, I. Scottish Universities Environmental Research Centre (SUERC) University of Edinburgh-University of Glasgow Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) De la Préhistoire à l'Actuel : Culture, Environnement et Anthropologie (PACEA) Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS) Department of Bentho-pelagic processes Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) 2009 https://hal.archives-ouvertes.fr/hal-00437279 en eng HAL CCSD American Association for the Advancement of Science hal-00437279 https://hal.archives-ouvertes.fr/hal-00437279 ISSN: 0036-8075 EISSN: 1095-9203 Science https://hal.archives-ouvertes.fr/hal-00437279 Science, American Association for the Advancement of Science, 2009, pp.1527-1531 info:eu-repo/semantics/article Journal articles 2009 ftccsdartic 2021-11-28T01:36:26Z International audience Variations in the intensity of high-latitude Northern Hemisphere summer insolation, driven largely by precession of the equinoxes, are widely thought to control the timing of Late Pleistocene glacial terminations. However, recently it has been suggested that changes in Earth's obliquity may be a more important mechanism. We present a new speleothem-based North Atlantic marine chronology that shows that the penultimate glacial termination (Termination II) commenced 141,000 T 2500 years before the present, too early to be explained by Northern Hemisphere summer insolation but consistent with changes in Earth's obliquity. Our record reveals that Terminations I and II are separated by three obliquity cycles and that they started at near-identical obliquity phases. Article in Journal/Newspaper North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
description |
International audience Variations in the intensity of high-latitude Northern Hemisphere summer insolation, driven largely by precession of the equinoxes, are widely thought to control the timing of Late Pleistocene glacial terminations. However, recently it has been suggested that changes in Earth's obliquity may be a more important mechanism. We present a new speleothem-based North Atlantic marine chronology that shows that the penultimate glacial termination (Termination II) commenced 141,000 T 2500 years before the present, too early to be explained by Northern Hemisphere summer insolation but consistent with changes in Earth's obliquity. Our record reveals that Terminations I and II are separated by three obliquity cycles and that they started at near-identical obliquity phases. |
author2 |
Scottish Universities Environmental Research Centre (SUERC) University of Edinburgh-University of Glasgow Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) De la Préhistoire à l'Actuel : Culture, Environnement et Anthropologie (PACEA) Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS) Department of Bentho-pelagic processes Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) |
format |
Article in Journal/Newspaper |
author |
Drysdale, R.N. Hellstrom, J. C. Zanchetta, G. Fallick, A. E. Sánchez Goñi, M. F. Couchoud, Isabelle McDonald, J. Maas, R. Lohmann, G. Isola, I. |
spellingShingle |
Drysdale, R.N. Hellstrom, J. C. Zanchetta, G. Fallick, A. E. Sánchez Goñi, M. F. Couchoud, Isabelle McDonald, J. Maas, R. Lohmann, G. Isola, I. Evidence for obliquity forcing of glacial Termination II |
author_facet |
Drysdale, R.N. Hellstrom, J. C. Zanchetta, G. Fallick, A. E. Sánchez Goñi, M. F. Couchoud, Isabelle McDonald, J. Maas, R. Lohmann, G. Isola, I. |
author_sort |
Drysdale, R.N. |
title |
Evidence for obliquity forcing of glacial Termination II |
title_short |
Evidence for obliquity forcing of glacial Termination II |
title_full |
Evidence for obliquity forcing of glacial Termination II |
title_fullStr |
Evidence for obliquity forcing of glacial Termination II |
title_full_unstemmed |
Evidence for obliquity forcing of glacial Termination II |
title_sort |
evidence for obliquity forcing of glacial termination ii |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.archives-ouvertes.fr/hal-00437279 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0036-8075 EISSN: 1095-9203 Science https://hal.archives-ouvertes.fr/hal-00437279 Science, American Association for the Advancement of Science, 2009, pp.1527-1531 |
op_relation |
hal-00437279 https://hal.archives-ouvertes.fr/hal-00437279 |
_version_ |
1766129107000623104 |