Atlantic Pa/Th composite, new tropical Atlantic sedimentary Pa/Th data and age models ...
Abrupt climate changes in the past have been attributed to variations in Atlantic Meridional Overturning Circulation (AMOC) strength. However, the exact timing and magnitude of past AMOC shifts remain elusive, which continues to limit our understanding of the driving mechanisms of such climate varia...
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ftdatacite:10.1594/pangaea.890942 2024-04-28T08:24:58+00:00 Atlantic Pa/Th composite, new tropical Atlantic sedimentary Pa/Th data and age models ... Ng, Hong Chin Robinson, Laura F McManus, Jerry F 2018 application/zip https://dx.doi.org/10.1594/pangaea.890942 https://doi.pangaea.de/10.1594/PANGAEA.890942 en eng PANGAEA https://dx.doi.org/10.1038/s41467-018-05312-3 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 article Supplementary Publication Series of Datasets Collection 2018 ftdatacite https://doi.org/10.1594/pangaea.89094210.1038/s41467-018-05312-3 2024-04-02T10:00:39Z Abrupt climate changes in the past have been attributed to variations in Atlantic Meridional Overturning Circulation (AMOC) strength. However, the exact timing and magnitude of past AMOC shifts remain elusive, which continues to limit our understanding of the driving mechanisms of such climate variability. Here we show a remarkably consistent signal of the 231Pa/230Th proxy that reveals a spatially coherent picture of western Atlantic circulation changes over the last deglaciation, during abrupt millennial-scale climate transitions. At the onset of deglaciation, we observe an early slowdown of circulation in the western Atlantic from around 19 to 16.5 thousand years ago (ka), consistent with the timing of accelerated Eurasian ice melting. The subsequent weakened AMOC state persists for over a millennium (~16.5-15 ka), during which time there is substantial ice rafting from the Laurentide ice sheet. This timing indicates a role for melting ice in driving a two-step AMOC slowdown, with a positive feedback ... : Supplement to: Ng, Hong Chin; Robinson, Laura F; McManus, Jerry F; Mohamed, Kais J; Jacobel, Allison W; Ivanovic, Ruza F; Gregoire, Lauren J; Chen, Tianyu (2018): Coherent deglacial changes in western Atlantic Ocean circulation. Nature Communications, 9(1) ... Article in Journal/Newspaper Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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English |
description |
Abrupt climate changes in the past have been attributed to variations in Atlantic Meridional Overturning Circulation (AMOC) strength. However, the exact timing and magnitude of past AMOC shifts remain elusive, which continues to limit our understanding of the driving mechanisms of such climate variability. Here we show a remarkably consistent signal of the 231Pa/230Th proxy that reveals a spatially coherent picture of western Atlantic circulation changes over the last deglaciation, during abrupt millennial-scale climate transitions. At the onset of deglaciation, we observe an early slowdown of circulation in the western Atlantic from around 19 to 16.5 thousand years ago (ka), consistent with the timing of accelerated Eurasian ice melting. The subsequent weakened AMOC state persists for over a millennium (~16.5-15 ka), during which time there is substantial ice rafting from the Laurentide ice sheet. This timing indicates a role for melting ice in driving a two-step AMOC slowdown, with a positive feedback ... : Supplement to: Ng, Hong Chin; Robinson, Laura F; McManus, Jerry F; Mohamed, Kais J; Jacobel, Allison W; Ivanovic, Ruza F; Gregoire, Lauren J; Chen, Tianyu (2018): Coherent deglacial changes in western Atlantic Ocean circulation. Nature Communications, 9(1) ... |
format |
Article in Journal/Newspaper |
author |
Ng, Hong Chin Robinson, Laura F McManus, Jerry F |
spellingShingle |
Ng, Hong Chin Robinson, Laura F McManus, Jerry F Atlantic Pa/Th composite, new tropical Atlantic sedimentary Pa/Th data and age models ... |
author_facet |
Ng, Hong Chin Robinson, Laura F McManus, Jerry F |
author_sort |
Ng, Hong Chin |
title |
Atlantic Pa/Th composite, new tropical Atlantic sedimentary Pa/Th data and age models ... |
title_short |
Atlantic Pa/Th composite, new tropical Atlantic sedimentary Pa/Th data and age models ... |
title_full |
Atlantic Pa/Th composite, new tropical Atlantic sedimentary Pa/Th data and age models ... |
title_fullStr |
Atlantic Pa/Th composite, new tropical Atlantic sedimentary Pa/Th data and age models ... |
title_full_unstemmed |
Atlantic Pa/Th composite, new tropical Atlantic sedimentary Pa/Th data and age models ... |
title_sort |
atlantic pa/th composite, new tropical atlantic sedimentary pa/th data and age models ... |
publisher |
PANGAEA |
publishDate |
2018 |
url |
https://dx.doi.org/10.1594/pangaea.890942 https://doi.pangaea.de/10.1594/PANGAEA.890942 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
https://dx.doi.org/10.1038/s41467-018-05312-3 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_doi |
https://doi.org/10.1594/pangaea.89094210.1038/s41467-018-05312-3 |
_version_ |
1797584951090085888 |