Thresher, Ronald and Rintoul, Stephen R. and Koslow, J. Anthony and Weidman, Chris and Adkins, Jess and Proctor, Craig (2004) Oceanic evidence of climate change in southern Australia over the last three centuries. Geophysical Research Letters, 31 (7). Art. No. L07212. ISSN 0094-8276 http://resolver.caltech.edu/CaltechAUTHORS:20120828-122216658
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Chemical analysis of deepwater octocorals collected at 1000 m depth off southern Australia indicates long-term cooling, beginning in the mid-18th century. This cooling appears to reflect shoaling of isotherms along the continental shelf, that can be related statistically, observationally and by modeling to increasing coastal sea-surface temperatures, that in turn reflect a poleward extension of the SW Pacific boundary current (the East Australian Current). The oceanographic changes implied by the coral record suggest climate change in temperate Australia starting about the time of European settlement. Correlations between temperate Australian and Antarctic indices suggest these long-term changes might also be relevant to Antarctic climate.
|Additional Information:||© 2004 American Geophysical Union. Received 18 October 2003; accepted 11 March 2004; published 13 April 2004. We thank L. Ayliffe, M. Bravington, K. Evans, K. Hayes, C. MacRae, P. Oke and A. B. Pittock for their assistance and valuable discussions. This study was supported by the Australian Fisheries and Research Development Corporation, the Australian Greenhouse Office, and the Land and Water Research Development Corporation.|
|Subject Keywords:||Coral age validation; Australia; Coral chemistry; Southern Ocean; Sub-tropical ridge; Climate proxy|
|Official Citation:||Thresher, R., S. R. Rintoul, J. A. Koslow, C. Weidman, J. Adkins, and C. Proctor (2004), Oceanic evidence of climate change in southern Australia over the last three centuries, Geophys. Res. Lett., 31, L07212, doi:10.1029/2003GL018869.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Aucoeur Ngo|
|Deposited On:||28 Aug 2012 20:55|
|Last Modified:||26 Dec 2012 16:04|
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