What is it about?
Between 2014 and 2016, the annual mean total Antarctic SIE decreased by an unprecedented amount, with the monthly total SIE reaching a record low level in October 2016. The rapid decline was well captured by a state-of-art global ocean-sea ice model, MITgcm-ECCO2, forced by advanced atmospheric reanalysis data, ERA-Interim. By conducting ensemble sensitivity experiments, it was demonstrated that the rapid decrease in total Antarctic SIE was predominantly a result of extremely anomalous wind-driven sea ice drift caused by record, deep atmospheric low-pressure systems over sectors of the Southern Ocean in 2016.
Photo by henrique setim on Unsplash
Why is it important?
Previous studies have suggested several responsible atmospheric and oceanic processes for this rapid decline. However, an explanation of the relative roles of atmospheric and oceanic processes in driving such large variability in total Antarctic SIE remained, and the major driver still needed to be identified.
Read the Original
This page is a summary of: Rapid Decline of Total Antarctic Sea Ice Extent during 2014–16 Controlled by Wind-Driven Sea Ice Drift, Journal of Climate, September 2019, American Meteorological Society, DOI: 10.1175/jcli-d-18-0635.1.
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