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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Online Access: | https://doi.org/10.5194/cp-7-801-2011 https://cp.copernicus.org/articles/7/801/2011/ |
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fttriple:oai:gotriple.eu:0r780XmZ0ESwKJBAl0vUW 2023-05-15T14:57:49+02:00 Tropical seaways played a more important role than high latitude seaways in Cenozoic cooling Zhang, Z. Nisancioglu, K. H. Flatøy, F. Bentsen, M. Bethke, I. Wang, H. 2018-09-27 https://doi.org/10.5194/cp-7-801-2011 https://cp.copernicus.org/articles/7/801/2011/ en eng Copernicus Publications doi:10.5194/cp-7-801-2011 10670/1.ya78l3 1814-9324 1814-9332 https://cp.copernicus.org/articles/7/801/2011/ undefined Geographica Helvetica - geography eISSN: 1814-9332 geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.5194/cp-7-801-2011 2023-01-22T17:39:37Z 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 Unknown Arctic Drake Passage Southern Ocean Climate of the Past 7 3 801 813 |
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geo envir Zhang, Z. Nisancioglu, K. H. Flatøy, F. Bentsen, M. Bethke, I. Wang, H. Tropical seaways played a more important role than high latitude seaways in Cenozoic cooling |
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geo envir |
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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 |
Zhang, Z. Nisancioglu, K. H. Flatøy, F. Bentsen, M. Bethke, I. Wang, H. |
author_facet |
Zhang, Z. Nisancioglu, K. H. Flatøy, F. Bentsen, M. Bethke, I. Wang, H. |
author_sort |
Zhang, Z. |
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 |
2018 |
url |
https://doi.org/10.5194/cp-7-801-2011 https://cp.copernicus.org/articles/7/801/2011/ |
geographic |
Arctic Drake Passage Southern Ocean |
geographic_facet |
Arctic Drake Passage Southern Ocean |
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 |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-7-801-2011 10670/1.ya78l3 1814-9324 1814-9332 https://cp.copernicus.org/articles/7/801/2011/ |
op_rights |
undefined |
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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1766329927238418432 |