Pliocene three-dimensional global ocean temperature reconstruction
The thermal structure of the mid-Piacenzian ocean is obtained by combining the Pliocene Research, Interpretation and Synoptic Mapping Project (PRISM3) multiproxy sea-surface temperature (SST) reconstruction with bottom water temperature estimates from 27 locations produced using Mg/Ca paleothermomet...
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ftdoajarticles:oai:doaj.org/article:8cb6ddae1c3a4b41a3cd260753240f02 2023-05-15T13:32:18+02:00 Pliocene three-dimensional global ocean temperature reconstruction H. J. Dowsett M. M. Robinson K. M. Foley 2009-12-01T00:00:00Z https://doaj.org/article/8cb6ddae1c3a4b41a3cd260753240f02 EN eng Copernicus Publications http://www.clim-past.net/5/769/2009/cp-5-769-2009.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 https://doaj.org/article/8cb6ddae1c3a4b41a3cd260753240f02 Climate of the Past, Vol 5, Iss 4, Pp 769-783 (2009) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2009 ftdoajarticles 2022-12-31T09:10:51Z The thermal structure of the mid-Piacenzian ocean is obtained by combining the Pliocene Research, Interpretation and Synoptic Mapping Project (PRISM3) multiproxy sea-surface temperature (SST) reconstruction with bottom water temperature estimates from 27 locations produced using Mg/Ca paleothermometry based upon the ostracod genus Krithe . Deep water temperature estimates are skewed toward the Atlantic Basin (63% of the locations) and represent depths from 1000 m to 4500 m. This reconstruction, meant to serve as a validation data set as well as an initialization for coupled numerical climate models, assumes a Pliocene water mass framework similar to that which exists today, with several important modifications. The area of formation of present day North Atlantic Deep Water (NADW) was expanded and extended further north toward the Arctic Ocean during the mid-Piacenzian relative to today. This, combined with a deeper Greenland-Scotland Ridge, allowed a greater volume of warmer NADW to enter the Atlantic Ocean. In the Southern Ocean, the Polar Front Zone was expanded relative to present day, but shifted closer to the Antarctic continent. This, combined with at least seasonal reduction in sea ice extent, resulted in decreased Antarctic Bottom Water (AABW) production (relative to present day) as well as possible changes in the depth of intermediate waters. The reconstructed mid-Piacenzian three-dimensional ocean was warmer overall than today, and the hypothesized aerial extent of water masses appears to fit the limited stable isotopic data available for this time period. Article in Journal/Newspaper Antarc* Antarctic Arctic Arctic Ocean Greenland Greenland-Scotland Ridge NADW North Atlantic Deep Water North Atlantic Sea ice Southern Ocean Directory of Open Access Journals: DOAJ Articles Arctic Antarctic Southern Ocean The Antarctic Arctic Ocean Greenland |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 H. J. Dowsett M. M. Robinson K. M. Foley Pliocene three-dimensional global ocean temperature reconstruction |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
The thermal structure of the mid-Piacenzian ocean is obtained by combining the Pliocene Research, Interpretation and Synoptic Mapping Project (PRISM3) multiproxy sea-surface temperature (SST) reconstruction with bottom water temperature estimates from 27 locations produced using Mg/Ca paleothermometry based upon the ostracod genus Krithe . Deep water temperature estimates are skewed toward the Atlantic Basin (63% of the locations) and represent depths from 1000 m to 4500 m. This reconstruction, meant to serve as a validation data set as well as an initialization for coupled numerical climate models, assumes a Pliocene water mass framework similar to that which exists today, with several important modifications. The area of formation of present day North Atlantic Deep Water (NADW) was expanded and extended further north toward the Arctic Ocean during the mid-Piacenzian relative to today. This, combined with a deeper Greenland-Scotland Ridge, allowed a greater volume of warmer NADW to enter the Atlantic Ocean. In the Southern Ocean, the Polar Front Zone was expanded relative to present day, but shifted closer to the Antarctic continent. This, combined with at least seasonal reduction in sea ice extent, resulted in decreased Antarctic Bottom Water (AABW) production (relative to present day) as well as possible changes in the depth of intermediate waters. The reconstructed mid-Piacenzian three-dimensional ocean was warmer overall than today, and the hypothesized aerial extent of water masses appears to fit the limited stable isotopic data available for this time period. |
format |
Article in Journal/Newspaper |
author |
H. J. Dowsett M. M. Robinson K. M. Foley |
author_facet |
H. J. Dowsett M. M. Robinson K. M. Foley |
author_sort |
H. J. Dowsett |
title |
Pliocene three-dimensional global ocean temperature reconstruction |
title_short |
Pliocene three-dimensional global ocean temperature reconstruction |
title_full |
Pliocene three-dimensional global ocean temperature reconstruction |
title_fullStr |
Pliocene three-dimensional global ocean temperature reconstruction |
title_full_unstemmed |
Pliocene three-dimensional global ocean temperature reconstruction |
title_sort |
pliocene three-dimensional global ocean temperature reconstruction |
publisher |
Copernicus Publications |
publishDate |
2009 |
url |
https://doaj.org/article/8cb6ddae1c3a4b41a3cd260753240f02 |
geographic |
Arctic Antarctic Southern Ocean The Antarctic Arctic Ocean Greenland |
geographic_facet |
Arctic Antarctic Southern Ocean The Antarctic Arctic Ocean Greenland |
genre |
Antarc* Antarctic Arctic Arctic Ocean Greenland Greenland-Scotland Ridge NADW North Atlantic Deep Water North Atlantic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Arctic Arctic Ocean Greenland Greenland-Scotland Ridge NADW North Atlantic Deep Water North Atlantic Sea ice Southern Ocean |
op_source |
Climate of the Past, Vol 5, Iss 4, Pp 769-783 (2009) |
op_relation |
http://www.clim-past.net/5/769/2009/cp-5-769-2009.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 https://doaj.org/article/8cb6ddae1c3a4b41a3cd260753240f02 |
_version_ |
1766025719666704384 |