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research article

Expression of the bipolar see-saw in Antarctic climate records during the last deglaciation

Stenni, B.
•
Buiron, D.
•
Frezzotti, M.
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December 5, 2010
Nature Geoscience

Ice-core records of climate from Greenland and Antarctica show asynchronous temperature variations on millennial timescales during the last glacial period. The warming during the transition from glacial to interglacial conditions was markedly different between the hemispheres, a pattern attributed to the thermal bipolar see-saw. However, a record from the Ross Sea sector of East Antarctica has been suggested to be synchronous with Northern Hemisphere climate change. Here we present a temperature record from the Talos Dome ice core, also located in the Ross Sea sector. We compare our record with ice-core analyses from Greenland, based on methane synchronization, and find clearly asynchronous temperature changes during the deglaciation. We also find distinct differences in Antarctic records, pointing to differences in the climate evolution of the Indo-Pacific and Atlantic sectors of Antarctica. In the Atlantic sector, we find that the rate of warming slowed between 16,000 and 14,500 years ago, parallel with the deceleration of the rise in atmospheric carbon dioxide concentrations and with a slight cooling over Greenland. In addition, our chronology supports the hypothesis that the cooling of the Antarctic Cold Reversal is synchronous with the Bølling-Allerød warming in the northern hemisphere 14,700 years ago. © 2011 Macmillan Publishers Limited. All rights reserved.

  • Details
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Type
research article
DOI
10.1038/ngeo1026
Web of Science ID

WOS:000285498600017

Author(s)
Stenni, B.
Buiron, D.
Frezzotti, M.
Albani, S.
Barbante, C.
Bard, E.
Barnola, J. M.
Baroni, M.
Baumgartner, M.
Bonazza, M.
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Date Issued

2010-12-05

Publisher

Springer Science and Business Media LLC

Published in
Nature Geoscience
Volume

4

Issue

1

Start page

46

End page

49

Subjects

climate change

•

core analysis

•

deglaciation

•

ice core

•

Last Glacial

•

temperature effect

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temporal record

•

Antarctica

•

Arctic

•

Atlantic Sector

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East Antarctica

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Greenland

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Ross Sea

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Southern Ocean

•

Talos Dome

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
SENSE  
Available on Infoscience
November 23, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/192627
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