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Sources of heterogeneous variability and trends in Antarctic sea-ice


Matear, RJ and O'Kane, TJ and Risbey, JS and Chamberlain, M, Sources of heterogeneous variability and trends in Antarctic sea-ice, Nature Communications, 6 Article 8656. ISSN 2041-1723 (2015) [Refereed Article]


Copyright Statement

2015 Macmillan Publishers Limited Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

DOI: doi:10.1038/ncomms9656


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 Niņo 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.

Item Details

Item Type:Refereed Article
Keywords:El Nino-Southern Oscillation, heterogeneity, Northern Hemisphere, sea ice, Southern Hemisphere, warming, wind forcing
Research Division:Earth Sciences
Research Group:Climate change science
Research Field:Climate change processes
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Understanding climate change
Objective Field:Effects of climate change on Antarctic and sub-Antarctic environments (excl. social impacts)
UTAS Author:Matear, RJ (Dr Richard Matear)
UTAS Author:O'Kane, TJ (Dr Terry O'Kane)
ID Code:118776
Year Published:2015
Web of Science® Times Cited:42
Deposited By:Zoology
Deposited On:2017-07-19
Last Modified:2017-08-09
Downloads:175 View Download Statistics

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