Minimal Antarctic sea ice during the Pliocene
Antarctic sea-ice concentration at Ocean Drilling Program Sites 1165 (64.380S, 67.219E) and 1166 (67.696S, 74.787E) was lower than today through much of the Pliocene. The low sea-ice concentration is evident from the proportion of the diatom Eucampia antarctica with intercalary valves (Eucampia inde...
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Geological Society of America
2005
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ftunivtasecite:oai:ecite.utas.edu.au:34526 2023-05-15T14:03:54+02:00 Minimal Antarctic sea ice during the Pliocene Whitehead, JM Wotherspoon, SJ Bohaty, SM 2005 https://doi.org/10.1130/G21013.1 http://ecite.utas.edu.au/34526 en eng Geological Society of America http://dx.doi.org/10.1130/G21013.1 http://purl.org/au-research/grants/arc/DP0345161 Whitehead, JM and Wotherspoon, SJ and Bohaty, SM, Minimal Antarctic sea ice during the Pliocene, Geology, 33, (2) pp. 137-140. ISSN 0091-7613 (2005) [Refereed Article] http://ecite.utas.edu.au/34526 Earth Sciences Physical Geography and Environmental Geoscience Glaciology Refereed Article PeerReviewed 2005 ftunivtasecite https://doi.org/10.1130/G21013.1 2019-12-13T21:13:16Z Antarctic sea-ice concentration at Ocean Drilling Program Sites 1165 (64.380S, 67.219E) and 1166 (67.696S, 74.787E) was lower than today through much of the Pliocene. The low sea-ice concentration is evident from the proportion of the diatom Eucampia antarctica with intercalary valves (Eucampia index). This sea-ice proxy was calibrated by using modern diatom data obtained from core-top samples and winter sea-ice concentration data (September average through 1979-1987). The modern relationship is expressed as a binomial generalized linear model (modern sea-ice model). This model was applied to the Pliocene Eucampia index within a 95% tolerance interval (obtained from bootstrap estimates). The results indicate that reduced winter sea-ice concentrations persisted through much of the Pliocene and at times were 78% and 61% relatively less concentrated than today at Sites 1165 and 1166, respectively. 2005 Geological Society of America. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice eCite UTAS (University of Tasmania) Antarctic Geology 33 2 137 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology Whitehead, JM Wotherspoon, SJ Bohaty, SM Minimal Antarctic sea ice during the Pliocene |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
description |
Antarctic sea-ice concentration at Ocean Drilling Program Sites 1165 (64.380S, 67.219E) and 1166 (67.696S, 74.787E) was lower than today through much of the Pliocene. The low sea-ice concentration is evident from the proportion of the diatom Eucampia antarctica with intercalary valves (Eucampia index). This sea-ice proxy was calibrated by using modern diatom data obtained from core-top samples and winter sea-ice concentration data (September average through 1979-1987). The modern relationship is expressed as a binomial generalized linear model (modern sea-ice model). This model was applied to the Pliocene Eucampia index within a 95% tolerance interval (obtained from bootstrap estimates). The results indicate that reduced winter sea-ice concentrations persisted through much of the Pliocene and at times were 78% and 61% relatively less concentrated than today at Sites 1165 and 1166, respectively. 2005 Geological Society of America. |
format |
Article in Journal/Newspaper |
author |
Whitehead, JM Wotherspoon, SJ Bohaty, SM |
author_facet |
Whitehead, JM Wotherspoon, SJ Bohaty, SM |
author_sort |
Whitehead, JM |
title |
Minimal Antarctic sea ice during the Pliocene |
title_short |
Minimal Antarctic sea ice during the Pliocene |
title_full |
Minimal Antarctic sea ice during the Pliocene |
title_fullStr |
Minimal Antarctic sea ice during the Pliocene |
title_full_unstemmed |
Minimal Antarctic sea ice during the Pliocene |
title_sort |
minimal antarctic sea ice during the pliocene |
publisher |
Geological Society of America |
publishDate |
2005 |
url |
https://doi.org/10.1130/G21013.1 http://ecite.utas.edu.au/34526 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_relation |
http://dx.doi.org/10.1130/G21013.1 http://purl.org/au-research/grants/arc/DP0345161 Whitehead, JM and Wotherspoon, SJ and Bohaty, SM, Minimal Antarctic sea ice during the Pliocene, Geology, 33, (2) pp. 137-140. ISSN 0091-7613 (2005) [Refereed Article] http://ecite.utas.edu.au/34526 |
op_doi |
https://doi.org/10.1130/G21013.1 |
container_title |
Geology |
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33 |
container_issue |
2 |
container_start_page |
137 |
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1766274786853388288 |