Latest Pliocene Northern Hemisphere glaciation amplified by intensified Atlantic meridional overturning circulation
Abstract The global climate has been dominated by glacial–interglacial variations since the intensification of Northern Hemisphere glaciation 2.7 million years ago. Although the Atlantic meridional overturning circulation has exerted strong influence on recent climatic changes, there is controversy...
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2020
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Online Access: | http://dx.doi.org/10.1038/s43247-020-00023-4 https://www.nature.com/articles/s43247-020-00023-4.pdf https://www.nature.com/articles/s43247-020-00023-4 |
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crspringernat:10.1038/s43247-020-00023-4 2023-05-15T16:49:59+02:00 Latest Pliocene Northern Hemisphere glaciation amplified by intensified Atlantic meridional overturning circulation Hayashi, Tatsuya Yamanaka, Toshiro Hikasa, Yuki Sato, Masahiko Kuwahara, Yoshihiro Ohno, Masao MEXT | Japan Society for the Promotion of Science 2020 http://dx.doi.org/10.1038/s43247-020-00023-4 https://www.nature.com/articles/s43247-020-00023-4.pdf https://www.nature.com/articles/s43247-020-00023-4 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Communications Earth & Environment volume 1, issue 1 ISSN 2662-4435 General Earth and Planetary Sciences General Environmental Science journal-article 2020 crspringernat https://doi.org/10.1038/s43247-020-00023-4 2022-01-04T15:58:49Z Abstract The global climate has been dominated by glacial–interglacial variations since the intensification of Northern Hemisphere glaciation 2.7 million years ago. Although the Atlantic meridional overturning circulation has exerted strong influence on recent climatic changes, there is controversy over its influence on Northern Hemisphere glaciation because its deep limb, North Atlantic Deep Water, was thought to have weakened. Here we show that Northern Hemisphere glaciation was amplified by the intensified Atlantic meridional overturning circulation, based on multi-proxy records from the subpolar North Atlantic. We found that the Iceland–Scotland Overflow Water, contributing North Atlantic Deep Water, significantly increased after 2.7 million years ago and was actively maintained even in early stages of individual glacials, in contrast with late stages when it drastically decreased because of iceberg melting. Probably, the active Nordic Seas overturning during the early stages of glacials facilitated the efficient growth of ice sheets and amplified glacial oscillations. Article in Journal/Newspaper Iceland Nordic Seas North Atlantic Deep Water North Atlantic Springer Nature (via Crossref) Communications Earth & Environment 1 1 |
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Springer Nature (via Crossref) |
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English |
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General Earth and Planetary Sciences General Environmental Science |
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General Earth and Planetary Sciences General Environmental Science Hayashi, Tatsuya Yamanaka, Toshiro Hikasa, Yuki Sato, Masahiko Kuwahara, Yoshihiro Ohno, Masao Latest Pliocene Northern Hemisphere glaciation amplified by intensified Atlantic meridional overturning circulation |
topic_facet |
General Earth and Planetary Sciences General Environmental Science |
description |
Abstract The global climate has been dominated by glacial–interglacial variations since the intensification of Northern Hemisphere glaciation 2.7 million years ago. Although the Atlantic meridional overturning circulation has exerted strong influence on recent climatic changes, there is controversy over its influence on Northern Hemisphere glaciation because its deep limb, North Atlantic Deep Water, was thought to have weakened. Here we show that Northern Hemisphere glaciation was amplified by the intensified Atlantic meridional overturning circulation, based on multi-proxy records from the subpolar North Atlantic. We found that the Iceland–Scotland Overflow Water, contributing North Atlantic Deep Water, significantly increased after 2.7 million years ago and was actively maintained even in early stages of individual glacials, in contrast with late stages when it drastically decreased because of iceberg melting. Probably, the active Nordic Seas overturning during the early stages of glacials facilitated the efficient growth of ice sheets and amplified glacial oscillations. |
author2 |
MEXT | Japan Society for the Promotion of Science |
format |
Article in Journal/Newspaper |
author |
Hayashi, Tatsuya Yamanaka, Toshiro Hikasa, Yuki Sato, Masahiko Kuwahara, Yoshihiro Ohno, Masao |
author_facet |
Hayashi, Tatsuya Yamanaka, Toshiro Hikasa, Yuki Sato, Masahiko Kuwahara, Yoshihiro Ohno, Masao |
author_sort |
Hayashi, Tatsuya |
title |
Latest Pliocene Northern Hemisphere glaciation amplified by intensified Atlantic meridional overturning circulation |
title_short |
Latest Pliocene Northern Hemisphere glaciation amplified by intensified Atlantic meridional overturning circulation |
title_full |
Latest Pliocene Northern Hemisphere glaciation amplified by intensified Atlantic meridional overturning circulation |
title_fullStr |
Latest Pliocene Northern Hemisphere glaciation amplified by intensified Atlantic meridional overturning circulation |
title_full_unstemmed |
Latest Pliocene Northern Hemisphere glaciation amplified by intensified Atlantic meridional overturning circulation |
title_sort |
latest pliocene northern hemisphere glaciation amplified by intensified atlantic meridional overturning circulation |
publisher |
Springer Science and Business Media LLC |
publishDate |
2020 |
url |
http://dx.doi.org/10.1038/s43247-020-00023-4 https://www.nature.com/articles/s43247-020-00023-4.pdf https://www.nature.com/articles/s43247-020-00023-4 |
genre |
Iceland Nordic Seas North Atlantic Deep Water North Atlantic |
genre_facet |
Iceland Nordic Seas North Atlantic Deep Water North Atlantic |
op_source |
Communications Earth & Environment volume 1, issue 1 ISSN 2662-4435 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s43247-020-00023-4 |
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Communications Earth & Environment |
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1 |
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