Nat Commun. 2015 Oct 21;6:8656. doi: 10.1038/ncomms9656.

Sources of heterogeneous variability and trends in Antarctic sea-ice.

Nature communications

Richard J Matear, Terence J O'Kane, James S Risbey, Matt Chamberlain

PMID: 26486973 DOI: 10.1038/ncomms9656

Abstract

While the Northern Hemisphere sea-ice has uniformly declined over the past several decades, the observed sea-ice in the Southern Hemisphere has exhibited regions of increase and decrease. Here we use a comprehensive set of ocean-sea-ice simulations (1990-2007) to elucidate the drivers of the observed heterogeneous sea-ice trends. We show wind variability is an important determinant of the heterogeneous pattern of the variability and trends in Southern Hemisphere sea-ice. Only in the West Pacific region does Southern Annular Mode wind forcing contribute significantly to the trend in sea-ice duration. El Niño Southern Oscillation wind forcing contribution to the sea-ice duration trend is confined to the Atlantic and Pacific. In the Indian Ocean, weather is a significant driver of the sea-ice duration trend. Only in the East Pacific region is wind forcing alone insufficient to give rise to the observed sea-ice decline and must be augmented by warming to reproduce the observations.

References

1. Science. 2002 May 3;296(5569):895-9 - PubMed
2. Nature. 2010 Apr 29;464(7293):1334-7 - PubMed

Publication Types

• Journal Article
• Research Support, Non-U.S. Gov't