Dynamic behaviour of the East Antarctic ice sheet during Pliocene warmth
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...
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ftcdlib:qt7cq9w66z 2023-05-15T13:50:53+02:00 Dynamic behaviour of the East Antarctic ice sheet during Pliocene warmth Cook, CP Van De Flierdt, T Williams, T Hemming, SR Iwai, M Kobayashi, M Jimenez-Espejo, FJ Escutia, C González, JJ Khim, BK McKay, RM Passchier, S Bohaty, SM Riesselman, CR Tauxe, L Sugisaki, S Galindo, AL Patterson, MO Sangiorgi, F Pierce, EL Brinkhuis, H Klaus, A Fehr, A Bendle, JAP Bijl, PK Carr, SA Dunbar, RB Flores, JA Hayden, TG Katsuki, K Kong, GS Nakai, M Olney, MP Pekar, SF Pross, J Röhl, U Sakai, T Shrivastava, PK Stickley, CE Tuo, S Welsh, K Yamane, M 765 - 769 2013-01-01 application/pdf http://www.escholarship.org/uc/item/7cq9w66z english eng eScholarship, University of California qt7cq9w66z http://www.escholarship.org/uc/item/7cq9w66z public Cook, CP; Van De Flierdt, T; Williams, T; Hemming, SR; Iwai, M; Kobayashi, M; et al.(2013). Dynamic behaviour of the East Antarctic ice sheet during Pliocene warmth. Nature Geoscience, 6(9), 765 - 769. doi:10.1038/ngeo1889. UC San Diego: Retrieved from: http://www.escholarship.org/uc/item/7cq9w66z article 2013 ftcdlib https://doi.org/10.1038/ngeo1889 2018-07-13T22:53:21Z 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. © 2013 Macmillan Publishers Limited. All rights reserved. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet Southern Ocean University of California: eScholarship Antarctic East Antarctic Ice Sheet East Antarctica Southern Ocean The Antarctic Wilkes Subglacial Basin ENVELOPE(145.000,145.000,-75.000,-75.000) Nature Geoscience 6 9 765 769 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
description |
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. © 2013 Macmillan Publishers Limited. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Cook, CP Van De Flierdt, T Williams, T Hemming, SR Iwai, M Kobayashi, M Jimenez-Espejo, FJ Escutia, C González, JJ Khim, BK McKay, RM Passchier, S Bohaty, SM Riesselman, CR Tauxe, L Sugisaki, S Galindo, AL Patterson, MO Sangiorgi, F Pierce, EL Brinkhuis, H Klaus, A Fehr, A Bendle, JAP Bijl, PK Carr, SA Dunbar, RB Flores, JA Hayden, TG Katsuki, K Kong, GS Nakai, M Olney, MP Pekar, SF Pross, J Röhl, U Sakai, T Shrivastava, PK Stickley, CE Tuo, S Welsh, K Yamane, M |
spellingShingle |
Cook, CP Van De Flierdt, T Williams, T Hemming, SR Iwai, M Kobayashi, M Jimenez-Espejo, FJ Escutia, C González, JJ Khim, BK McKay, RM Passchier, S Bohaty, SM Riesselman, CR Tauxe, L Sugisaki, S Galindo, AL Patterson, MO Sangiorgi, F Pierce, EL Brinkhuis, H Klaus, A Fehr, A Bendle, JAP Bijl, PK Carr, SA Dunbar, RB Flores, JA Hayden, TG Katsuki, K Kong, GS Nakai, M Olney, MP Pekar, SF Pross, J Röhl, U Sakai, T Shrivastava, PK Stickley, CE Tuo, S Welsh, K Yamane, M Dynamic behaviour of the East Antarctic ice sheet during Pliocene warmth |
author_facet |
Cook, CP Van De Flierdt, T Williams, T Hemming, SR Iwai, M Kobayashi, M Jimenez-Espejo, FJ Escutia, C González, JJ Khim, BK McKay, RM Passchier, S Bohaty, SM Riesselman, CR Tauxe, L Sugisaki, S Galindo, AL Patterson, MO Sangiorgi, F Pierce, EL Brinkhuis, H Klaus, A Fehr, A Bendle, JAP Bijl, PK Carr, SA Dunbar, RB Flores, JA Hayden, TG Katsuki, K Kong, GS Nakai, M Olney, MP Pekar, SF Pross, J Röhl, U Sakai, T Shrivastava, PK Stickley, CE Tuo, S Welsh, K Yamane, M |
author_sort |
Cook, CP |
title |
Dynamic behaviour of the East Antarctic ice sheet during Pliocene warmth |
title_short |
Dynamic behaviour of the East Antarctic ice sheet during Pliocene warmth |
title_full |
Dynamic behaviour of the East Antarctic ice sheet during Pliocene warmth |
title_fullStr |
Dynamic behaviour of the East Antarctic ice sheet during Pliocene warmth |
title_full_unstemmed |
Dynamic behaviour of the East Antarctic ice sheet during Pliocene warmth |
title_sort |
dynamic behaviour of the east antarctic ice sheet during pliocene warmth |
publisher |
eScholarship, University of California |
publishDate |
2013 |
url |
http://www.escholarship.org/uc/item/7cq9w66z |
op_coverage |
765 - 769 |
long_lat |
ENVELOPE(145.000,145.000,-75.000,-75.000) |
geographic |
Antarctic East Antarctic Ice Sheet East Antarctica Southern Ocean The Antarctic Wilkes Subglacial Basin |
geographic_facet |
Antarctic East Antarctic Ice Sheet East Antarctica Southern Ocean The Antarctic Wilkes Subglacial Basin |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Southern Ocean |
op_source |
Cook, CP; Van De Flierdt, T; Williams, T; Hemming, SR; Iwai, M; Kobayashi, M; et al.(2013). Dynamic behaviour of the East Antarctic ice sheet during Pliocene warmth. Nature Geoscience, 6(9), 765 - 769. doi:10.1038/ngeo1889. UC San Diego: Retrieved from: http://www.escholarship.org/uc/item/7cq9w66z |
op_relation |
qt7cq9w66z http://www.escholarship.org/uc/item/7cq9w66z |
op_rights |
public |
op_doi |
https://doi.org/10.1038/ngeo1889 |
container_title |
Nature Geoscience |
container_volume |
6 |
container_issue |
9 |
container_start_page |
765 |
op_container_end_page |
769 |
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1766254257725505536 |