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...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , |
Format: | Text |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/cp-5-769-2009 https://cp.copernicus.org/articles/5/769/2009/ |
id |
ftcopernicus:oai:publications.copernicus.org:cp1153 |
---|---|
record_format |
openpolar |
spelling |
ftcopernicus:oai:publications.copernicus.org:cp1153 2023-05-15T13:36:36+02:00 Pliocene three-dimensional global ocean temperature reconstruction Dowsett, H. J. Robinson, M. M. Foley, K. M. 2018-09-27 application/pdf https://doi.org/10.5194/cp-5-769-2009 https://cp.copernicus.org/articles/5/769/2009/ eng eng doi:10.5194/cp-5-769-2009 https://cp.copernicus.org/articles/5/769/2009/ eISSN: 1814-9332 Text 2018 ftcopernicus https://doi.org/10.5194/cp-5-769-2009 2020-07-20T16:26:31Z 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. Text Antarc* Antarctic Arctic Arctic Ocean Greenland Greenland-Scotland Ridge NADW North Atlantic Deep Water North Atlantic Sea ice Southern Ocean Copernicus Publications: E-Journals Antarctic Arctic Arctic Ocean Greenland Southern Ocean The Antarctic Climate of the Past 5 4 769 783 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
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 |
Text |
author |
Dowsett, H. J. Robinson, M. M. Foley, K. M. |
spellingShingle |
Dowsett, H. J. Robinson, M. M. Foley, K. M. Pliocene three-dimensional global ocean temperature reconstruction |
author_facet |
Dowsett, H. J. Robinson, M. M. Foley, K. M. |
author_sort |
Dowsett, H. J. |
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 |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-5-769-2009 https://cp.copernicus.org/articles/5/769/2009/ |
geographic |
Antarctic Arctic Arctic Ocean Greenland Southern Ocean The Antarctic |
geographic_facet |
Antarctic Arctic Arctic Ocean Greenland Southern Ocean The Antarctic |
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 |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-5-769-2009 https://cp.copernicus.org/articles/5/769/2009/ |
op_doi |
https://doi.org/10.5194/cp-5-769-2009 |
container_title |
Climate of the Past |
container_volume |
5 |
container_issue |
4 |
container_start_page |
769 |
op_container_end_page |
783 |
_version_ |
1766081414907822080 |