Persistent influence of obliquity on ice age terminations since the Middle Pleistocene transition
Radiometric dating of glacial terminations over the past 640,000 years suggests pacing by Earth's climatic precession, with each glacial-interglacial period spanning four or five cycles of ∼20,000 years. However, the lack of firm age estimates for older Pleistocene terminations confounds attemp...
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Online Access: | http://hdl.handle.net/10278/3726009 https://doi.org/10.1126/science.aaz2924 https://science.sciencemag.org/content/367/6483/1235 |
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ftuniveneziairis:oai:iris.unive.it:10278/3726009 2024-04-14T08:15:46+00:00 Persistent influence of obliquity on ice age terminations since the Middle Pleistocene transition Bajo P. Drysdale R. N. Woodhead J. D. Hellstrom J. C. Hodell D. Ferretti P. Voelker A. H. L. Zanchetta G. Rodrigues T. Wolff E. Tyler J. Frisia S. Spotl C. Fallick A. E. Bajo, P. Drysdale, R. N. Woodhead, J. D. Hellstrom, J. C. Hodell, D. Ferretti, P. Voelker, A. H. L. Zanchetta, G. Rodrigues, T. Wolff, E. Tyler, J. Frisia, S. Spotl, C. Fallick, A. E. 2020 STAMPA http://hdl.handle.net/10278/3726009 https://doi.org/10.1126/science.aaz2924 https://science.sciencemag.org/content/367/6483/1235 eng eng info:eu-repo/semantics/altIdentifier/pmid/32165585 info:eu-repo/semantics/altIdentifier/wos/WOS:000520023800040 volume:367 issue:6483 firstpage:1235 lastpage:1239 numberofpages:5 journal:SCIENCE info:eu-repo/grantAgreement/EC/FP7/PERG-GA-2010-272134 - MILLEVARIABILI http://hdl.handle.net/10278/3726009 doi:10.1126/science.aaz2924 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85081789955 https://science.sciencemag.org/content/367/6483/1235 info:eu-repo/semantics/closedAccess Settore GEO/02 - Geologia Stratigrafica e Sedimentologica Settore GEO/04 - Geografia Fisica e Geomorfologia Settore GEO/08 - Geochimica e Vulcanologia info:eu-repo/semantics/article 2020 ftuniveneziairis https://doi.org/10.1126/science.aaz2924 2024-03-21T18:11:36Z Radiometric dating of glacial terminations over the past 640,000 years suggests pacing by Earth's climatic precession, with each glacial-interglacial period spanning four or five cycles of ∼20,000 years. However, the lack of firm age estimates for older Pleistocene terminations confounds attempts to test the persistence of precession forcing. We combine an Italian speleothem record anchored by a uranium-lead chronology with North Atlantic ocean data to show that the first two deglaciations of the so-called 100,000-year world are separated by two obliquity cycles, with each termination starting at the same high phase of obliquity, but at opposing phases of precession. An assessment of 11 radiometrically dated terminations spanning the past million years suggests that obliquity exerted a persistent influence on not only their initiation but also their duration. Article in Journal/Newspaper North Atlantic Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) Science 367 6483 1240 1246 |
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Open Polar |
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Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
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ftuniveneziairis |
language |
English |
topic |
Settore GEO/02 - Geologia Stratigrafica e Sedimentologica Settore GEO/04 - Geografia Fisica e Geomorfologia Settore GEO/08 - Geochimica e Vulcanologia |
spellingShingle |
Settore GEO/02 - Geologia Stratigrafica e Sedimentologica Settore GEO/04 - Geografia Fisica e Geomorfologia Settore GEO/08 - Geochimica e Vulcanologia Bajo P. Drysdale R. N. Woodhead J. D. Hellstrom J. C. Hodell D. Ferretti P. Voelker A. H. L. Zanchetta G. Rodrigues T. Wolff E. Tyler J. Frisia S. Spotl C. Fallick A. E. Persistent influence of obliquity on ice age terminations since the Middle Pleistocene transition |
topic_facet |
Settore GEO/02 - Geologia Stratigrafica e Sedimentologica Settore GEO/04 - Geografia Fisica e Geomorfologia Settore GEO/08 - Geochimica e Vulcanologia |
description |
Radiometric dating of glacial terminations over the past 640,000 years suggests pacing by Earth's climatic precession, with each glacial-interglacial period spanning four or five cycles of ∼20,000 years. However, the lack of firm age estimates for older Pleistocene terminations confounds attempts to test the persistence of precession forcing. We combine an Italian speleothem record anchored by a uranium-lead chronology with North Atlantic ocean data to show that the first two deglaciations of the so-called 100,000-year world are separated by two obliquity cycles, with each termination starting at the same high phase of obliquity, but at opposing phases of precession. An assessment of 11 radiometrically dated terminations spanning the past million years suggests that obliquity exerted a persistent influence on not only their initiation but also their duration. |
author2 |
Bajo, P. Drysdale, R. N. Woodhead, J. D. Hellstrom, J. C. Hodell, D. Ferretti, P. Voelker, A. H. L. Zanchetta, G. Rodrigues, T. Wolff, E. Tyler, J. Frisia, S. Spotl, C. Fallick, A. E. |
format |
Article in Journal/Newspaper |
author |
Bajo P. Drysdale R. N. Woodhead J. D. Hellstrom J. C. Hodell D. Ferretti P. Voelker A. H. L. Zanchetta G. Rodrigues T. Wolff E. Tyler J. Frisia S. Spotl C. Fallick A. E. |
author_facet |
Bajo P. Drysdale R. N. Woodhead J. D. Hellstrom J. C. Hodell D. Ferretti P. Voelker A. H. L. Zanchetta G. Rodrigues T. Wolff E. Tyler J. Frisia S. Spotl C. Fallick A. E. |
author_sort |
Bajo P. |
title |
Persistent influence of obliquity on ice age terminations since the Middle Pleistocene transition |
title_short |
Persistent influence of obliquity on ice age terminations since the Middle Pleistocene transition |
title_full |
Persistent influence of obliquity on ice age terminations since the Middle Pleistocene transition |
title_fullStr |
Persistent influence of obliquity on ice age terminations since the Middle Pleistocene transition |
title_full_unstemmed |
Persistent influence of obliquity on ice age terminations since the Middle Pleistocene transition |
title_sort |
persistent influence of obliquity on ice age terminations since the middle pleistocene transition |
publishDate |
2020 |
url |
http://hdl.handle.net/10278/3726009 https://doi.org/10.1126/science.aaz2924 https://science.sciencemag.org/content/367/6483/1235 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/32165585 info:eu-repo/semantics/altIdentifier/wos/WOS:000520023800040 volume:367 issue:6483 firstpage:1235 lastpage:1239 numberofpages:5 journal:SCIENCE info:eu-repo/grantAgreement/EC/FP7/PERG-GA-2010-272134 - MILLEVARIABILI http://hdl.handle.net/10278/3726009 doi:10.1126/science.aaz2924 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85081789955 https://science.sciencemag.org/content/367/6483/1235 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1126/science.aaz2924 |
container_title |
Science |
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367 |
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6483 |
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1240 |
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1246 |
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