Tropical seaways played a more important role than high latitude seaways in Cenozoic cooling
Following the Early Eocene climatic optimum (EECO, ~55–50 Ma), climate deteriorated and gradually changed the earth from a greenhouse into an icehouse, with major cooling events at the Eocene-Oligocene boundary (∼34 Ma) and the Middle Miocene (∼15 Ma). It is believed that the opening of the Drake Pa...
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ftdoajarticles:oai:doaj.org/article:95da735e34ad4e358daeff7b258c9626 2023-05-15T14:58:40+02:00 Tropical seaways played a more important role than high latitude seaways in Cenozoic cooling Z. Zhang K. H. Nisancioglu F. Flatøy M. Bentsen I. Bethke H. Wang 2011-07-01T00:00:00Z https://doi.org/10.5194/cp-7-801-2011 https://doaj.org/article/95da735e34ad4e358daeff7b258c9626 EN eng Copernicus Publications http://www.clim-past.net/7/801/2011/cp-7-801-2011.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-7-801-2011 1814-9324 1814-9332 https://doaj.org/article/95da735e34ad4e358daeff7b258c9626 Climate of the Past, Vol 7, Iss 3, Pp 801-813 (2011) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2011 ftdoajarticles https://doi.org/10.5194/cp-7-801-2011 2022-12-30T21:15:31Z Following the Early Eocene climatic optimum (EECO, ~55–50 Ma), climate deteriorated and gradually changed the earth from a greenhouse into an icehouse, with major cooling events at the Eocene-Oligocene boundary (∼34 Ma) and the Middle Miocene (∼15 Ma). It is believed that the opening of the Drake Passage had a marked impact on the cooling at the Eocene-Oligocene boundary. Based on an Early Eocene simulation, we study the sensitivity of climate and ocean circulation to tectonic events such as the closing of the West Siberian Seaway, the deepening of the Arctic-Atlantic Seaway, the opening of the Drake Passage, and the constriction of the Tethys and Central American seaways. The opening of the Drake Passage, together with the closing of the West Siberian Seaway and the deepening of the Arctic-Atlantic Seaway, weakened the Southern Ocean Deep Water (SODW) dominated ocean circulation and led to a weak cooling at high latitudes, thus contributing to the observed Early Cenozoic cooling. However, the later constriction of the Tethys and Central American Seaways is shown to give a strong cooling at southern high latitudes. This cooling was related to the transition of ocean circulation from a SODW-dominated mode to the modern-like ocean circulation dominated by North Atlantic Deep Water (NADW). Article in Journal/Newspaper Arctic Drake Passage NADW North Atlantic Deep Water North Atlantic Southern Ocean Directory of Open Access Journals: DOAJ Articles Arctic Southern Ocean Drake Passage Climate of the Past 7 3 801 813 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
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Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 Z. Zhang K. H. Nisancioglu F. Flatøy M. Bentsen I. Bethke H. Wang Tropical seaways played a more important role than high latitude seaways in Cenozoic cooling |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Following the Early Eocene climatic optimum (EECO, ~55–50 Ma), climate deteriorated and gradually changed the earth from a greenhouse into an icehouse, with major cooling events at the Eocene-Oligocene boundary (∼34 Ma) and the Middle Miocene (∼15 Ma). It is believed that the opening of the Drake Passage had a marked impact on the cooling at the Eocene-Oligocene boundary. Based on an Early Eocene simulation, we study the sensitivity of climate and ocean circulation to tectonic events such as the closing of the West Siberian Seaway, the deepening of the Arctic-Atlantic Seaway, the opening of the Drake Passage, and the constriction of the Tethys and Central American seaways. The opening of the Drake Passage, together with the closing of the West Siberian Seaway and the deepening of the Arctic-Atlantic Seaway, weakened the Southern Ocean Deep Water (SODW) dominated ocean circulation and led to a weak cooling at high latitudes, thus contributing to the observed Early Cenozoic cooling. However, the later constriction of the Tethys and Central American Seaways is shown to give a strong cooling at southern high latitudes. This cooling was related to the transition of ocean circulation from a SODW-dominated mode to the modern-like ocean circulation dominated by North Atlantic Deep Water (NADW). |
format |
Article in Journal/Newspaper |
author |
Z. Zhang K. H. Nisancioglu F. Flatøy M. Bentsen I. Bethke H. Wang |
author_facet |
Z. Zhang K. H. Nisancioglu F. Flatøy M. Bentsen I. Bethke H. Wang |
author_sort |
Z. Zhang |
title |
Tropical seaways played a more important role than high latitude seaways in Cenozoic cooling |
title_short |
Tropical seaways played a more important role than high latitude seaways in Cenozoic cooling |
title_full |
Tropical seaways played a more important role than high latitude seaways in Cenozoic cooling |
title_fullStr |
Tropical seaways played a more important role than high latitude seaways in Cenozoic cooling |
title_full_unstemmed |
Tropical seaways played a more important role than high latitude seaways in Cenozoic cooling |
title_sort |
tropical seaways played a more important role than high latitude seaways in cenozoic cooling |
publisher |
Copernicus Publications |
publishDate |
2011 |
url |
https://doi.org/10.5194/cp-7-801-2011 https://doaj.org/article/95da735e34ad4e358daeff7b258c9626 |
geographic |
Arctic Southern Ocean Drake Passage |
geographic_facet |
Arctic Southern Ocean Drake Passage |
genre |
Arctic Drake Passage NADW North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
Arctic Drake Passage NADW North Atlantic Deep Water North Atlantic Southern Ocean |
op_source |
Climate of the Past, Vol 7, Iss 3, Pp 801-813 (2011) |
op_relation |
http://www.clim-past.net/7/801/2011/cp-7-801-2011.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-7-801-2011 1814-9324 1814-9332 https://doaj.org/article/95da735e34ad4e358daeff7b258c9626 |
op_doi |
https://doi.org/10.5194/cp-7-801-2011 |
container_title |
Climate of the Past |
container_volume |
7 |
container_issue |
3 |
container_start_page |
801 |
op_container_end_page |
813 |
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