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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American Association for the Advancement of Science
2020
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Online Access: | https://hdl.handle.net/2440/133277 https://doi.org/10.1126/science.aaw1114 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/133277 2023-12-17T10:46:36+01:00 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. Spötl, C. Fallick, A.E. 2020 https://hdl.handle.net/2440/133277 https://doi.org/10.1126/science.aaw1114 en eng American Association for the Advancement of Science http://purl.org/au-research/grants/arc/DP110102185 http://purl.org/au-research/grants/arc/DP160102969 http://purl.org/au-research/grants/arc/FT130100801 Science, 2020; 367(6483):1235-1239 1095-9203 0036-8075 https://hdl.handle.net/2440/133277 doi:10.1126/science.aaw1114 Tyler, J. [0000-0001-8046-0215] Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works http://dx.doi.org/10.1126/science.aaw1114 Journal article 2020 ftunivadelaidedl https://doi.org/10.1126/science.aaw1114 2023-11-20T23:35:55Z 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. Petra Bajo, Russell N. Drysdale, Jon D. Woodhead, John C. Hellstrom, David Hodell, Patrizia Ferretti, Antje H.L. Voelker, Giovanni Zanchetta, Teresa Rodrigues, Eric Wolff, Jonathan Tyler, Silvia Frisia, Christoph Spötl, Anthony E. Fallick Article in Journal/Newspaper North Atlantic The University of Adelaide: Digital Library Silvia ENVELOPE(-57.900,-57.900,-63.300,-63.300) Science 367 6483 1235 1239 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
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. Petra Bajo, Russell N. Drysdale, Jon D. Woodhead, John C. Hellstrom, David Hodell, Patrizia Ferretti, Antje H.L. Voelker, Giovanni Zanchetta, Teresa Rodrigues, Eric Wolff, Jonathan Tyler, Silvia Frisia, Christoph Spötl, Anthony E. Fallick |
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. Spötl, C. Fallick, A.E. |
spellingShingle |
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. Spötl, C. Fallick, A.E. Persistent influence of obliquity on ice age terminations since the Middle Pleistocene transition |
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. Spötl, 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 |
publisher |
American Association for the Advancement of Science |
publishDate |
2020 |
url |
https://hdl.handle.net/2440/133277 https://doi.org/10.1126/science.aaw1114 |
long_lat |
ENVELOPE(-57.900,-57.900,-63.300,-63.300) |
geographic |
Silvia |
geographic_facet |
Silvia |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
http://dx.doi.org/10.1126/science.aaw1114 |
op_relation |
http://purl.org/au-research/grants/arc/DP110102185 http://purl.org/au-research/grants/arc/DP160102969 http://purl.org/au-research/grants/arc/FT130100801 Science, 2020; 367(6483):1235-1239 1095-9203 0036-8075 https://hdl.handle.net/2440/133277 doi:10.1126/science.aaw1114 Tyler, J. [0000-0001-8046-0215] |
op_rights |
Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works |
op_doi |
https://doi.org/10.1126/science.aaw1114 |
container_title |
Science |
container_volume |
367 |
container_issue |
6483 |
container_start_page |
1235 |
op_container_end_page |
1239 |
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1785570144441860096 |