Near-tropical Early Eocene terrestrial temperatures at the Australo-Antarctic margin, western Tasmania
A worldwide greenhouse warm climate prevailed in the Early Eocene, and nowhere was warming more dramatic than at high latitudes. Sea-surface temperatures of ~34 °C have been estimated for a site at paleolatitude 65°S on the East Tasman Plateau of the southwest Pacific Ocean, but these estimates requ...
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Format: | Article in Journal/Newspaper |
Language: | English |
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Geological Soc America Inc
2012
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Online Access: | http://hdl.handle.net/2440/72637 https://doi.org/10.1130/G32584.1 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/72637 2023-12-24T10:11:31+01:00 Near-tropical Early Eocene terrestrial temperatures at the Australo-Antarctic margin, western Tasmania Carpenter, R. Jordan, G. Macphail, M. Hill, R. 2012 http://hdl.handle.net/2440/72637 https://doi.org/10.1130/G32584.1 en eng Geological Soc America Inc ARC Geology (Boulder), 2012; 40(3):267-270 0091-7613 1943-2682 http://hdl.handle.net/2440/72637 doi:10.1130/G32584.1 Hill, R. [0000-0003-4564-4339] © 2012 Geological Society of America http://dx.doi.org/10.1130/g32584.1 Journal article 2012 ftunivadelaidedl https://doi.org/10.1130/G32584.110.1130/g32584.1 2023-11-27T23:25:21Z A worldwide greenhouse warm climate prevailed in the Early Eocene, and nowhere was warming more dramatic than at high latitudes. Sea-surface temperatures of ~34 °C have been estimated for a site at paleolatitude 65°S on the East Tasman Plateau of the southwest Pacific Ocean, but these estimates require independent validation, including from terrestrial proxies. Here we determine a near-tropical terrestrial mean annual temperature estimate of ~24 °C at sea level for an Early Eocene site in Tasmania, Australia, using three proxies based on welldated estuarine plant fossils. This estimate is lower than the nearby sea estimates to the east, but similarly suggests that, as in the southwest Pacific, Early Eocene climates in the eastern Australo-Antarctic region were warmer than inferred elsewhere at high latitudes, including on the Antarctic Peninsula. Such data are essential for improving our understanding of climatic and biotic evolution in the Southern Hemisphere. © 2012 Geological Society of America. Raymond J. Carpenter, Gregory J. Jordan, Mike K. Macphail, and Robert S. Hill Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula The University of Adelaide: Digital Library Antarctic The Antarctic Antarctic Peninsula Pacific Geology 40 3 267 270 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
description |
A worldwide greenhouse warm climate prevailed in the Early Eocene, and nowhere was warming more dramatic than at high latitudes. Sea-surface temperatures of ~34 °C have been estimated for a site at paleolatitude 65°S on the East Tasman Plateau of the southwest Pacific Ocean, but these estimates require independent validation, including from terrestrial proxies. Here we determine a near-tropical terrestrial mean annual temperature estimate of ~24 °C at sea level for an Early Eocene site in Tasmania, Australia, using three proxies based on welldated estuarine plant fossils. This estimate is lower than the nearby sea estimates to the east, but similarly suggests that, as in the southwest Pacific, Early Eocene climates in the eastern Australo-Antarctic region were warmer than inferred elsewhere at high latitudes, including on the Antarctic Peninsula. Such data are essential for improving our understanding of climatic and biotic evolution in the Southern Hemisphere. © 2012 Geological Society of America. Raymond J. Carpenter, Gregory J. Jordan, Mike K. Macphail, and Robert S. Hill |
format |
Article in Journal/Newspaper |
author |
Carpenter, R. Jordan, G. Macphail, M. Hill, R. |
spellingShingle |
Carpenter, R. Jordan, G. Macphail, M. Hill, R. Near-tropical Early Eocene terrestrial temperatures at the Australo-Antarctic margin, western Tasmania |
author_facet |
Carpenter, R. Jordan, G. Macphail, M. Hill, R. |
author_sort |
Carpenter, R. |
title |
Near-tropical Early Eocene terrestrial temperatures at the Australo-Antarctic margin, western Tasmania |
title_short |
Near-tropical Early Eocene terrestrial temperatures at the Australo-Antarctic margin, western Tasmania |
title_full |
Near-tropical Early Eocene terrestrial temperatures at the Australo-Antarctic margin, western Tasmania |
title_fullStr |
Near-tropical Early Eocene terrestrial temperatures at the Australo-Antarctic margin, western Tasmania |
title_full_unstemmed |
Near-tropical Early Eocene terrestrial temperatures at the Australo-Antarctic margin, western Tasmania |
title_sort |
near-tropical early eocene terrestrial temperatures at the australo-antarctic margin, western tasmania |
publisher |
Geological Soc America Inc |
publishDate |
2012 |
url |
http://hdl.handle.net/2440/72637 https://doi.org/10.1130/G32584.1 |
geographic |
Antarctic The Antarctic Antarctic Peninsula Pacific |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Pacific |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_source |
http://dx.doi.org/10.1130/g32584.1 |
op_relation |
ARC Geology (Boulder), 2012; 40(3):267-270 0091-7613 1943-2682 http://hdl.handle.net/2440/72637 doi:10.1130/G32584.1 Hill, R. [0000-0003-4564-4339] |
op_rights |
© 2012 Geological Society of America |
op_doi |
https://doi.org/10.1130/G32584.110.1130/g32584.1 |
container_title |
Geology |
container_volume |
40 |
container_issue |
3 |
container_start_page |
267 |
op_container_end_page |
270 |
_version_ |
1786166193848057856 |