The response of the southern annular mode, the east Australian current, and the southern mid-latitude ocean circulation to global warming

Cai, W. and Shi, G. and Cowan, T. and Bi, D. and Ribbe, J. (2005) The response of the southern annular mode, the east Australian current, and the southern mid-latitude ocean circulation to global warming. Geophysical Research Letters, 32 (23). pp. 1-4. ISSN 0094-8276

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Abstract

Climate models predict an upward trend of the Southern Annular Mode (SAM) in response to increasing atmospheric CO2 concentration, however the consequential impact of this change on oceanic circulation has not been explored. Here we analyse the outputs of a series of global warming experiments from the CSIRO Mark 3 climate model. We show that although for the zonal wind stress change the maximum is located at approximately 60S, in terms of the change in surface wind stress curl, the maximum is situated at approximately 48S. This change in the wind stress curl causes a spin-up of the entire southern midlatitude ocean circulation including a southward strengthening of the subtropical gyres, particularly the East Australia Current (EAC). The intensified EAC generates a warming rate in the Tasman Sea that is the greatest in the Southern Hemisphere (SH) with significant implications for sea level rise. The pan-Southern Ocean scale suggests a broad impact on the marine ecosystem of the entire southern midlatitude ocean.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Draft version deposited in accordance with the copyright policy of the publisher. An edited version of this paper was published by AGU. Copyright [2005] American Geophysical Union. Cai, Wenju and Shi, Gi and Cowan, Tim and Bi, D. and Ribbe, Joachim (2005) The response of the southern annular mode, the East Australian Current, and the southern mid-latitude ocean circulation to global warming. Geophysical Research Letters, 32. To view the open abstract, go to http://dx.doi.org and enter the doi:10.1029/2005GL024701
Depositing User: Dr Joachim Ribbe
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 11 Oct 2007 00:34
Last Modified: 02 Jul 2013 22:35
Uncontrolled Keywords: ocean; climate change; climatology; East Australia Current; Southern Ocean; Southern Annular Mode; climate variability
Fields of Research (FOR2008): 04 Earth Sciences > 0401 Atmospheric Sciences > 040104 Climate Change Processes
04 Earth Sciences > 0405 Oceanography > 040503 Physical Oceanography
05 Environmental Sciences > 0501 Ecological Applications > 050101 Ecological Impacts of Climate Change
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9603 Climate and Climate Change > 960303 Climate Change Models
Identification Number or DOI: doi: 10.1029/2005GL024701
URI: http://eprints.usq.edu.au/id/eprint/1070

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