Increased ventilation of Antarctic deep water during the warm mid-Pliocene
The mid-Pliocene warm period is a recent warm geological period that shares similarities with predictions of future climate. It is generally held the mid-Pliocene Atlantic Meridional Overturning Circulation must have been stronger, to explain a weak Atlantic meridional δ13C gradient and large northe...
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Online Access: | https://hdl.handle.net/1956/12376 https://doi.org/10.1038/ncomms2521 |
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ftunivbergen:oai:bora.uib.no:1956/12376 2023-05-15T13:39:51+02:00 Increased ventilation of Antarctic deep water during the warm mid-Pliocene Zhang, Zhongshi Nisancioglu, Kerim Hestnes Ninnemann, Ulysses Silas 2016-04-11T08:45:30Z application/pdf https://hdl.handle.net/1956/12376 https://doi.org/10.1038/ncomms2521 eng eng Nature Publishing Group urn:issn:2041-1723 https://hdl.handle.net/1956/12376 https://doi.org/10.1038/ncomms2521 cristin:1038477 Attribution-NonCommercial-ShareAlike CC BY-NC-SA http://creativecommons.org/licenses/by-nc-sa/3.0/ Copyright 2013 Macmillan Publishers Limited VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Oseanografi: 452 VDP::Mathematics and natural scienses: 400::Geosciences: 450::Oceanography: 452 Peer reviewed Journal article 2016 ftunivbergen https://doi.org/10.1038/ncomms2521 2023-03-14T17:40:36Z The mid-Pliocene warm period is a recent warm geological period that shares similarities with predictions of future climate. It is generally held the mid-Pliocene Atlantic Meridional Overturning Circulation must have been stronger, to explain a weak Atlantic meridional δ13C gradient and large northern high-latitude warming. However, climate models do not simulate such stronger Atlantic Meridional Overturning Circulation, when forced with mid-Pliocene boundary conditions. Proxy reconstructions allow for an alternative scenario that the weak δ13C gradient can be explained by increased ventilation and reduced stratification in the Southern Ocean. Here this alternative scenario is supported by simulations with the Norwegian Earth System Model (NorESM-L), which simulate an intensified and slightly poleward shifted wind field off Antarctica, giving enhanced ventilation and reduced stratification in the Southern Ocean. Our findings challenge the prevailing theory and show how increased Southern Ocean ventilation can reconcile existing model-data discrepancies about Atlantic Meridional Overturning Circulation while explaining fundamental ocean features. publishedVersion Article in Journal/Newspaper Antarc* Antarctic Antarctica Southern Ocean University of Bergen: Bergen Open Research Archive (BORA-UiB) Antarctic Southern Ocean Nature Communications 4 1 |
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Open Polar |
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University of Bergen: Bergen Open Research Archive (BORA-UiB) |
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ftunivbergen |
language |
English |
topic |
VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Oseanografi: 452 VDP::Mathematics and natural scienses: 400::Geosciences: 450::Oceanography: 452 |
spellingShingle |
VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Oseanografi: 452 VDP::Mathematics and natural scienses: 400::Geosciences: 450::Oceanography: 452 Zhang, Zhongshi Nisancioglu, Kerim Hestnes Ninnemann, Ulysses Silas Increased ventilation of Antarctic deep water during the warm mid-Pliocene |
topic_facet |
VDP::Matematikk og naturvitenskap: 400::Geofag: 450::Oseanografi: 452 VDP::Mathematics and natural scienses: 400::Geosciences: 450::Oceanography: 452 |
description |
The mid-Pliocene warm period is a recent warm geological period that shares similarities with predictions of future climate. It is generally held the mid-Pliocene Atlantic Meridional Overturning Circulation must have been stronger, to explain a weak Atlantic meridional δ13C gradient and large northern high-latitude warming. However, climate models do not simulate such stronger Atlantic Meridional Overturning Circulation, when forced with mid-Pliocene boundary conditions. Proxy reconstructions allow for an alternative scenario that the weak δ13C gradient can be explained by increased ventilation and reduced stratification in the Southern Ocean. Here this alternative scenario is supported by simulations with the Norwegian Earth System Model (NorESM-L), which simulate an intensified and slightly poleward shifted wind field off Antarctica, giving enhanced ventilation and reduced stratification in the Southern Ocean. Our findings challenge the prevailing theory and show how increased Southern Ocean ventilation can reconcile existing model-data discrepancies about Atlantic Meridional Overturning Circulation while explaining fundamental ocean features. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Zhang, Zhongshi Nisancioglu, Kerim Hestnes Ninnemann, Ulysses Silas |
author_facet |
Zhang, Zhongshi Nisancioglu, Kerim Hestnes Ninnemann, Ulysses Silas |
author_sort |
Zhang, Zhongshi |
title |
Increased ventilation of Antarctic deep water during the warm mid-Pliocene |
title_short |
Increased ventilation of Antarctic deep water during the warm mid-Pliocene |
title_full |
Increased ventilation of Antarctic deep water during the warm mid-Pliocene |
title_fullStr |
Increased ventilation of Antarctic deep water during the warm mid-Pliocene |
title_full_unstemmed |
Increased ventilation of Antarctic deep water during the warm mid-Pliocene |
title_sort |
increased ventilation of antarctic deep water during the warm mid-pliocene |
publisher |
Nature Publishing Group |
publishDate |
2016 |
url |
https://hdl.handle.net/1956/12376 https://doi.org/10.1038/ncomms2521 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Southern Ocean |
op_relation |
urn:issn:2041-1723 https://hdl.handle.net/1956/12376 https://doi.org/10.1038/ncomms2521 cristin:1038477 |
op_rights |
Attribution-NonCommercial-ShareAlike CC BY-NC-SA http://creativecommons.org/licenses/by-nc-sa/3.0/ Copyright 2013 Macmillan Publishers Limited |
op_doi |
https://doi.org/10.1038/ncomms2521 |
container_title |
Nature Communications |
container_volume |
4 |
container_issue |
1 |
_version_ |
1766125491081707520 |