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Sources of heterogeneous variability and trends in Antarctic sea-ice
Citation
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]
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Copyright Statement
2015 Macmillan Publishers Limited Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/
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 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 |
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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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