期刊
GEOPHYSICAL RESEARCH LETTERS
卷 40, 期 22, 页码 5894-5898出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2013GL058371
关键词
sea ice
资金
- Natural Environment Research Council [bas0100023] Funding Source: researchfish
- NERC [bas0100023] Funding Source: UKRI
On 24 September 2012 the Antarctic sea ice extent (SIE) reached a new annual daily maximum (ADM) for the satellite era of 19.72x10(6) km(2). 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 degrees W to 30 degrees 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 1 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 similar to 40% to the 2012 anomaly, with depression activity adding similar to 60%.
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