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The Amundsen Sea Low: variability, change and impact on Antarctic climate


Raphael, MN and Marshall, GJ and Turner, J and Fogt, RL and Schneider, D and Dixon, DA and Hosking, JS and Jones, JM and Hobbs, WR, The Amundsen Sea Low: variability, change and impact on Antarctic climate, American Meteorological Society. Bulletin, 97, (1) pp. 111-121. ISSN 0003-0007 (2016) [Refereed Article]

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Copyright 2016 American Meteorological Society

DOI: doi:10.1175/BAMS-D-14-00018.1


The Amundsen Sea Low (ASL) is a climatological low pressure center that exerts considerable influence on the climate of West Antarctica. Its potential to explain important recent changes in Antarctic climate, for example in temperature and sea ice extent, means that it has become the focus of an increasing number of studies. Here, we summarize current understanding of the ASL, using reanalysis datasets to analyze recent variability and trends, and ice-core chemistry and climate model projections to examine past and future changes in the ASL, respectively. The ASL has deepened in recent decades, affecting the climate through its influence on the regional meridional wind field, which controls the advection of moisture and heat into the continent. Deepening of the ASL in spring is consistent with observed West Antarctic warming and greater sea ice extent in the Ross Sea. Climate model simulations for recent decades indicate that this deepening is mediated by tropical variability while climate model projections through the 21st century suggest that the ASL will deepen in some seasons in response to greenhouse gas concentration increases.

Item Details

Item Type:Refereed Article
Keywords:polar change, atmospheric dynamics
Research Division:Earth Sciences
Research Group:Atmospheric sciences
Research Field:Atmospheric dynamics
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:Hobbs, WR (Dr Will Hobbs)
ID Code:106477
Year Published:2016
Web of Science® Times Cited:176
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2016-02-11
Last Modified:2022-08-24

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