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Links between the Amundsen Sea Low and sea ice in the Ross Sea: seasonal and interannual relationships

Citation

Raphael, MN and Holland, MM and Landrum, L and Hobbs, WR, Links between the Amundsen Sea Low and sea ice in the Ross Sea: seasonal and interannual relationships, Climate Dynamics, 52, (3-4) pp. 2333-2349. ISSN 0930-7575 (2018) [Refereed Article]

Copyright Statement

Copyright 2018 Springer-Verlag GmbH Germany, part of Springer Nature

DOI: doi:10.1007/s00382-018-4258-4

Abstract

Previous studies have shown that sea ice extent in the Southern Ocean is influenced by the intensity and location of the Amundsen Sea Low (ASL), through their effect on the meridional winds. However, the inhomogeneous nature of the influence of the ASL on sea ice as well as its influence during critical periods of the sea ice annual cycle is not clear. In this study, we do a spatio-temporal analysis of links between the ASL and the sea ice during the advance and retreat periods of the ice over the period 1979–2013 focusing on the role of the meridional and zonal winds. We use the ERA-Interim monthly-averaged 500 mb geopotential height and 10 m wind data along with monthly Passive Microwave Sea Ice Concentrations (SIC) to examine the seasonal and interannual relationships between the ASL and SIC in the Ross–Amundsen sea ice sector. To characterize the state of the ASL we use indices that describe its location and its intensity. We show that the ASL has preferred locations and intensities during ice advance and retreat seasons. The strength and direction of the influence of the ASL are not spatially homogeneous and can change from advance to retreat season and there are strong significant relationships between the characteristics of the ASL and SIC, within and across seasons and interannually.

Item Details

Item Type:Refereed Article
Keywords:Antarctic change, atmospheric dynamics, cryosphere, Antarctic sea ice variability, Amundsen Sea Low, sea ice-atmosphere interaction
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Physical Oceanography
Objective Division:Environment
Objective Group:Climate and Climate Change
Objective Field:Effects of Climate Change and Variability on Antarctic and Sub-Antarctic Environments (excl. Social Impacts)
UTAS Author:Hobbs, WR (Dr Will Hobbs)
ID Code:126038
Year Published:2018
Web of Science® Times Cited:2
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2018-05-18
Last Modified:2019-04-26
Downloads:0

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