Antarctic deglacial pattern in a 30 kyr record of sea surface temperature offshore South Australia

Comparison of ice cores from Greenland and Antarctica shows an asynchronous two-step warming at these high latitudes during the Last Termination. However, the question whether this asynchrony extends to lower latitudes is unclear mainly due to the scarcity of paleorecords from the Southern Hemispher...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Calvo, E, Pelejero, Carles, De Deckker, Patrick, Logan, Graham A
Format: Article in Journal/Newspaper
Language:unknown
Published: American Geophysical Union
Subjects:
Keywords: Atmospheric temperature
Climate change
Geochronology
Glaciers
Sea ice
Deglacial pattern
Hemisphere
Paleoclimatic data
Sea surface temperature
Oceanography
deglaciation
ice core
Northern Hemisphere
paleoclimate
Southe
Antarctic
Greenland
Antarc*
Antarctica
Online Access:http://hdl.handle.net/1885/31860
https://doi.org/10.1029/2007GL029937
https://openresearch-repository.anu.edu.au/bitstream/1885/31860/5/Antarctic_deglacial_DeDeckker.pdf.jpg
https://openresearch-repository.anu.edu.au/bitstream/1885/31860/7/01_Calvo_Antarctic_deglacial_pattern_in_2007.pdf.jpg
Description
Summary:Comparison of ice cores from Greenland and Antarctica shows an asynchronous two-step warming at these high latitudes during the Last Termination. However, the question whether this asynchrony extends to lower latitudes is unclear mainly due to the scarcity of paleorecords from the Southern Hemisphere. New data from a marine core collected off South Australia (∼36°S) allows a detailed reconstruction of sea-surface temperatures over the Last Termination. This confirms the existence of an Antarctic-type deglacial pattern and shows no indication of cooling associated with the Northern Hemisphere YD event. The SST record also provides a new comparison with the more extensive paleoclimatic data available from continental Australia. This shows a strong climatic link between onshore and offshore records for Australia and to Southern Hemisphere paleorecords. We also show a progressive SST drop over the last ∼ 6.5 kyr not seen before for the Australian region.

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