Pliocene summer sea surface temperature reconstruction using silicoflagellates from Southern Ocean ODP Site 1165
In the modern marine environment the silicoflagellate genus Dictyocha is rare, or absent, south of the Antarctic polar front (APF); the genus Distephanus, in contrast, is dominant. In sediments recovered from ODP Site 1165, 1600 km south of the front,however, three intervals where Dictyocha is abund...
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American Geophysical Union
2003
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Online Access: | https://doi.org/10.1029/2002PA000829 http://ecite.utas.edu.au/32620 |
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ftunivtasecite:oai:ecite.utas.edu.au:32620 2023-05-15T14:03:54+02:00 Pliocene summer sea surface temperature reconstruction using silicoflagellates from Southern Ocean ODP Site 1165 Whitehead, JM Bohaty, SM 2003 https://doi.org/10.1029/2002PA000829 http://ecite.utas.edu.au/32620 en eng American Geophysical Union http://dx.doi.org/10.1029/2002PA000829 Whitehead, JM and Bohaty, SM, Pliocene summer sea surface temperature reconstruction using silicoflagellates from Southern Ocean ODP Site 1165, Paleoceanography, 18, (3) pp. 1075. ISSN 0883-8305 (2003) [Refereed Article] http://ecite.utas.edu.au/32620 Earth Sciences Geology Palaeontology (incl. Palynology) Refereed Article PeerReviewed 2003 ftunivtasecite https://doi.org/10.1029/2002PA000829 2019-12-13T21:11:54Z In the modern marine environment the silicoflagellate genus Dictyocha is rare, or absent, south of the Antarctic polar front (APF); the genus Distephanus, in contrast, is dominant. In sediments recovered from ODP Site 1165, 1600 km south of the front,however, three intervals where Dictyocha is abundant are interpreted to represent Pliocene warm events. Comparison of our data with Ciesielski and Weaver's [1974] modern core top silicoflagellate relationship with sea surface temperature (SST) indicates that at Site 1165 mean annual SST was approximately 5C at 3.7 Ma (event 1), and approximately 4C at 4.3-4.4 Ma (event II) and 4.55-4.8 Ma (event III). Event I represents a 5.5C warning, and events II and III represents a 4.5C warming relative to modern mean annual SST. Dictyocha is absent from other Site 1165 Pliocene intervals, which suggests that cooler SST (<2C) prevailed. The warm events detected at Site 1165 may represent times when North Atlantic Deep Water production and ocean heat transport into the Southern Ocean exerted maximum influence. Article in Journal/Newspaper Antarc* Antarctic North Atlantic Deep Water North Atlantic Southern Ocean eCite UTAS (University of Tasmania) Antarctic Southern Ocean The Antarctic Paleoceanography 18 3 n/a n/a |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Geology Palaeontology (incl. Palynology) |
spellingShingle |
Earth Sciences Geology Palaeontology (incl. Palynology) Whitehead, JM Bohaty, SM Pliocene summer sea surface temperature reconstruction using silicoflagellates from Southern Ocean ODP Site 1165 |
topic_facet |
Earth Sciences Geology Palaeontology (incl. Palynology) |
description |
In the modern marine environment the silicoflagellate genus Dictyocha is rare, or absent, south of the Antarctic polar front (APF); the genus Distephanus, in contrast, is dominant. In sediments recovered from ODP Site 1165, 1600 km south of the front,however, three intervals where Dictyocha is abundant are interpreted to represent Pliocene warm events. Comparison of our data with Ciesielski and Weaver's [1974] modern core top silicoflagellate relationship with sea surface temperature (SST) indicates that at Site 1165 mean annual SST was approximately 5C at 3.7 Ma (event 1), and approximately 4C at 4.3-4.4 Ma (event II) and 4.55-4.8 Ma (event III). Event I represents a 5.5C warning, and events II and III represents a 4.5C warming relative to modern mean annual SST. Dictyocha is absent from other Site 1165 Pliocene intervals, which suggests that cooler SST (<2C) prevailed. The warm events detected at Site 1165 may represent times when North Atlantic Deep Water production and ocean heat transport into the Southern Ocean exerted maximum influence. |
format |
Article in Journal/Newspaper |
author |
Whitehead, JM Bohaty, SM |
author_facet |
Whitehead, JM Bohaty, SM |
author_sort |
Whitehead, JM |
title |
Pliocene summer sea surface temperature reconstruction using silicoflagellates from Southern Ocean ODP Site 1165 |
title_short |
Pliocene summer sea surface temperature reconstruction using silicoflagellates from Southern Ocean ODP Site 1165 |
title_full |
Pliocene summer sea surface temperature reconstruction using silicoflagellates from Southern Ocean ODP Site 1165 |
title_fullStr |
Pliocene summer sea surface temperature reconstruction using silicoflagellates from Southern Ocean ODP Site 1165 |
title_full_unstemmed |
Pliocene summer sea surface temperature reconstruction using silicoflagellates from Southern Ocean ODP Site 1165 |
title_sort |
pliocene summer sea surface temperature reconstruction using silicoflagellates from southern ocean odp site 1165 |
publisher |
American Geophysical Union |
publishDate |
2003 |
url |
https://doi.org/10.1029/2002PA000829 http://ecite.utas.edu.au/32620 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic North Atlantic Deep Water North Atlantic Southern Ocean |
op_relation |
http://dx.doi.org/10.1029/2002PA000829 Whitehead, JM and Bohaty, SM, Pliocene summer sea surface temperature reconstruction using silicoflagellates from Southern Ocean ODP Site 1165, Paleoceanography, 18, (3) pp. 1075. ISSN 0883-8305 (2003) [Refereed Article] http://ecite.utas.edu.au/32620 |
op_doi |
https://doi.org/10.1029/2002PA000829 |
container_title |
Paleoceanography |
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18 |
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3 |
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n/a |
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1766274782090756096 |