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Near-tropical Early Eocene terrestrial temperatures at the Australo-Antarctic margin, western Tasmania


Carpenter, RJ and Jordan, GJ and Macphail, MK and Hill, RS, Near-tropical Early Eocene terrestrial temperatures at the Australo-Antarctic margin, western Tasmania, Geology, 40, (3) pp. 267-270. ISSN 0091-7613 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 Geological Society of America

DOI: doi:10.1130/G32584.1


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 65S on the East Tasman Plateau of the southwest Pacifi c 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 Pacifi c, 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.

Item Details

Item Type:Refereed Article
Keywords:Antarctic, palaeoclimate, Eocene
Research Division:Earth Sciences
Research Group:Physical geography and environmental geoscience
Research Field:Palaeoclimatology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the environmental sciences
UTAS Author:Carpenter, RJ (Dr Raymond Carpenter)
UTAS Author:Jordan, GJ (Professor Greg Jordan)
ID Code:80121
Year Published:2012
Funding Support:Australian Research Council (DP120100501)
Web of Science® Times Cited:42
Deposited By:Plant Science
Deposited On:2012-10-23
Last Modified:2017-10-30

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