Plio-Pleistocene deep-sea ventilation in the eastern Pacific and potential linkages with Northern Hemisphere glaciation
Antarctic bottom water (AABW) production is a key factor governing global ocean circulation, and the present disintegration of the Antarctic Ice Sheet slows it. However, its long-term variability has not been well documented. On the basis of high-resolution chemical scanning of a well-dated marine f...
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craaas:10.1126/sciadv.add1467 2024-09-15T17:41:20+00:00 Plio-Pleistocene deep-sea ventilation in the eastern Pacific and potential linkages with Northern Hemisphere glaciation Yi, Liang Medina-Elizalde, Martín Tan, Liangcheng Kemp, David B. Li, Yanzhen Kletetschka, Gunther Xie, Qiang Yao, Huiqiang He, Huaiyu Deng, Chenglong Ogg, James G. 2023 http://dx.doi.org/10.1126/sciadv.add1467 https://www.science.org/doi/pdf/10.1126/sciadv.add1467 en eng American Association for the Advancement of Science (AAAS) Science Advances volume 9, issue 8 ISSN 2375-2548 journal-article 2023 craaas https://doi.org/10.1126/sciadv.add1467 2024-08-29T04:00:43Z Antarctic bottom water (AABW) production is a key factor governing global ocean circulation, and the present disintegration of the Antarctic Ice Sheet slows it. However, its long-term variability has not been well documented. On the basis of high-resolution chemical scanning of a well-dated marine ferromanganese nodule from the eastern Pacific, we derive a record of abyssal ventilation spanning the past 4.7 million years and evaluate its linkage to AABW formation over this period. We find that abyssal ventilation was relatively weak in the early Pliocene and persistently intensified from 3.4 million years ago onward. Seven episodes of markedly reduced ocean ventilation indicative of AABW formation collapse are identified since the late Pliocene, which were accompanied by key stages of Northern Hemisphere glaciation. We suggest that the interpolar climate synchronization within these inferred seven collapse events may have intensified global glaciation by inducing poleward moisture transport in the Northern Hemisphere. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet AAAS Resource Center (American Association for the Advancement of Science) Science Advances 9 8 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
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craaas |
language |
English |
description |
Antarctic bottom water (AABW) production is a key factor governing global ocean circulation, and the present disintegration of the Antarctic Ice Sheet slows it. However, its long-term variability has not been well documented. On the basis of high-resolution chemical scanning of a well-dated marine ferromanganese nodule from the eastern Pacific, we derive a record of abyssal ventilation spanning the past 4.7 million years and evaluate its linkage to AABW formation over this period. We find that abyssal ventilation was relatively weak in the early Pliocene and persistently intensified from 3.4 million years ago onward. Seven episodes of markedly reduced ocean ventilation indicative of AABW formation collapse are identified since the late Pliocene, which were accompanied by key stages of Northern Hemisphere glaciation. We suggest that the interpolar climate synchronization within these inferred seven collapse events may have intensified global glaciation by inducing poleward moisture transport in the Northern Hemisphere. |
format |
Article in Journal/Newspaper |
author |
Yi, Liang Medina-Elizalde, Martín Tan, Liangcheng Kemp, David B. Li, Yanzhen Kletetschka, Gunther Xie, Qiang Yao, Huiqiang He, Huaiyu Deng, Chenglong Ogg, James G. |
spellingShingle |
Yi, Liang Medina-Elizalde, Martín Tan, Liangcheng Kemp, David B. Li, Yanzhen Kletetschka, Gunther Xie, Qiang Yao, Huiqiang He, Huaiyu Deng, Chenglong Ogg, James G. Plio-Pleistocene deep-sea ventilation in the eastern Pacific and potential linkages with Northern Hemisphere glaciation |
author_facet |
Yi, Liang Medina-Elizalde, Martín Tan, Liangcheng Kemp, David B. Li, Yanzhen Kletetschka, Gunther Xie, Qiang Yao, Huiqiang He, Huaiyu Deng, Chenglong Ogg, James G. |
author_sort |
Yi, Liang |
title |
Plio-Pleistocene deep-sea ventilation in the eastern Pacific and potential linkages with Northern Hemisphere glaciation |
title_short |
Plio-Pleistocene deep-sea ventilation in the eastern Pacific and potential linkages with Northern Hemisphere glaciation |
title_full |
Plio-Pleistocene deep-sea ventilation in the eastern Pacific and potential linkages with Northern Hemisphere glaciation |
title_fullStr |
Plio-Pleistocene deep-sea ventilation in the eastern Pacific and potential linkages with Northern Hemisphere glaciation |
title_full_unstemmed |
Plio-Pleistocene deep-sea ventilation in the eastern Pacific and potential linkages with Northern Hemisphere glaciation |
title_sort |
plio-pleistocene deep-sea ventilation in the eastern pacific and potential linkages with northern hemisphere glaciation |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1126/sciadv.add1467 https://www.science.org/doi/pdf/10.1126/sciadv.add1467 |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_source |
Science Advances volume 9, issue 8 ISSN 2375-2548 |
op_doi |
https://doi.org/10.1126/sciadv.add1467 |
container_title |
Science Advances |
container_volume |
9 |
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8 |
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1810487488135823360 |