Dynamic behaviour of the East Antarctic ice sheet during Pliocene warmth

Cook, Carys P., van de Flierdt, Tina, Williams, Trevor, Hemming, Sidney R., Iwai, Masao, Kobayashi, Munemasa, Jimenez-Espejo, Francisco J., Escutia, Carlota, Gonzalez, Jhon Jairo, Khim, Boo-Keun, McKay, Robert M., Passchier, Sandra, Bohaty, Stevem M., Riesselman, Christina R., Tauxe, Lisa, Sugisaki, Saiko, Galindo, Alberto Lopez, Patterson, Molly O., Sangiorgi, Francesca, Pierce, Elizabeth L., Brinkhuis, Henk, Klaus, Adam, Fehr, Annick, Bendle, James A. P., Bijl, Peter K., Carr, Stephanie a., Dunbar, Robert B., Flores, Jose Abel, Hayden, Travis G., Katsuki, Kota., Kong, Gee Soo, Nakai, Mutsumi, Olney, Matthew P., Pekar, Stephen F., Pross, Jorg, Rohl, Ursula, Sakai, Toyosaburo, Shrivastava, Prakash K., Stickley, Catherine E., Tuo, Shouting, Welsh, Kevin and Yamane, Masako (2013) Dynamic behaviour of the East Antarctic ice sheet during Pliocene warmth. Nature Geoscience, 6 9: 765-769. doi:10.1038/ngeo1889


Author Cook, Carys P.
van de Flierdt, Tina
Williams, Trevor
Hemming, Sidney R.
Iwai, Masao
Kobayashi, Munemasa
Jimenez-Espejo, Francisco J.
Escutia, Carlota
Gonzalez, Jhon Jairo
Khim, Boo-Keun
McKay, Robert M.
Passchier, Sandra
Bohaty, Stevem M.
Riesselman, Christina R.
Tauxe, Lisa
Sugisaki, Saiko
Galindo, Alberto Lopez
Patterson, Molly O.
Sangiorgi, Francesca
Pierce, Elizabeth L.
Brinkhuis, Henk
Klaus, Adam
Fehr, Annick
Bendle, James A. P.
Bijl, Peter K.
Carr, Stephanie a.
Dunbar, Robert B.
Flores, Jose Abel
Hayden, Travis G.
Katsuki, Kota.
Kong, Gee Soo
Nakai, Mutsumi
Olney, Matthew P.
Pekar, Stephen F.
Pross, Jorg
Rohl, Ursula
Sakai, Toyosaburo
Shrivastava, Prakash K.
Stickley, Catherine E.
Tuo, Shouting
Welsh, Kevin
Yamane, Masako
Title Dynamic behaviour of the East Antarctic ice sheet during Pliocene warmth
Journal name Nature Geoscience   Check publisher's open access policy
ISSN 1752-0894
1752-0908
Publication date 2013-01-01
Year available 2013
Sub-type Article (original research)
DOI 10.1038/ngeo1889
Volume 6
Issue 9
Start page 765
End page 769
Total pages 5
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Collection year 2014
Language eng
Subject 1900 Earth and Planetary Sciences
Abstract Warm intervals within the Pliocene epoch (5.33-2.58 million years ago) were characterized by global temperatures comparable to those predicted for the end of this century and atmospheric CO 2 concentrations similar to today. Estimates for global sea level highstands during these times imply possible retreat of the East Antarctic ice sheet, but ice-proximal evidence from the Antarctic margin is scarce. Here we present new data from Pliocene marine sediments recovered offshore of Adélie Land, East Antarctica, that reveal dynamic behaviour of the East Antarctic ice sheet in the vicinity of the low-lying Wilkes Subglacial Basin during times of past climatic warmth. Sedimentary sequences deposited between 5.3 and 3.3 million years ago indicate increases in Southern Ocean surface water productivity, associated with elevated circum-Antarctic temperatures. The geochemical provenance of detrital material deposited during these warm intervals suggests active erosion of continental bedrock from within the Wilkes Subglacial Basin, an area today buried beneath the East Antarctic ice sheet. We interpret this erosion to be associated with retreat of the ice sheet margin several hundreds of kilometres inland and conclude that the East Antarctic ice sheet was sensitive to climatic warmth during the Pliocene.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Official 2014 Collection
 
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