Temporal and spatial evolution of the Antarctic sea ice prior to the September 2012 record maximum extent

On 24 September 2012 the Antarctic sea ice extent (SIE) reached a new annual daily maximum (ADM) for the satellite era of 19.72 × 106 km2. The largest positive SIE anomalies compared to the mean of all ADMs were found over the northern Amundsen Sea, off the coast of Wilkes Land, with smaller positiv...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Turner, John, Hosking, J. Scott, Phillips, Tony, Marshall, Gareth J.
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2013
Subjects:
Antarctic
The Antarctic
Dronning Maud Land
Amundsen Sea
Wilkes Land
Antarc*
Sea ice
Online Access:http://nora.nerc.ac.uk/id/eprint/504010/
https://nora.nerc.ac.uk/id/eprint/504010/1/grl51155.pdf
https://doi.org/10.1002/2013GL058371
Description
Summary:On 24 September 2012 the Antarctic sea ice extent (SIE) reached a new annual daily maximum (ADM) for the satellite era of 19.72 × 106 km2. The largest positive SIE anomalies compared to the mean of all ADMs were found over the northern Amundsen Sea, off the coast of Wilkes Land, with smaller positive anomalies off the Dronning Maud Land coast (30° W to 30° E). The SIE at the ADM is significantly correlated with the extents for the previous 80 days, but the ice growth during the winter of 2012 was close to the climatological rate and one month before the ADM the SIE was near the recent mean. Deep depressions in the circumpolar trough since late August 2012 resulted in strong southerly flow and marked northward sea ice advection. The linear trend in SIE suggests that it contributed ~40% to the 2012 anomaly, with depression activity adding ~60%.

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