Antarctic control on tropical Indian Ocean sea surface temperature and hydrography.

Kiefer, T. and McCave, I. N. and Elderfield, H. (2006) Antarctic control on tropical Indian Ocean sea surface temperature and hydrography. Geophysical Research Letters, 33. L24612, doi:10.1029/2006GL027097. DOI 10.1029/2006GL027097

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Abstract

[1] We reconstructed the surface hydrography of the South Equatorial Current in the western Indian Ocean for the last 65,000 years using a marine sediment core record. Results show that tropical Indian Ocean temperatures resemble temperatures from Antarctic ice cores with warm and cold fluctuations synchronous with the Antarctic Cold Reversal and the Antarctic warm events A1–A4. The most likely thermal link involves Subantarctic Mode Water (SAMW) which forms north of the subpolar frontal zone and spreads northward into the Indian Ocean. This subsurface water mass is the prime suspect because of a stronger temperature response in the thermocline (recorded by the foraminifer N. dutertrei) than in surface water (G. ruber).

Item Type: Article
Uncontrolled Keywords: 2007 AREP IA52 IA53 2006 P
Subjects: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Journal or Publication Title: Geophysical Research Letters
Volume: 33
Page Range: L24612, doi:10.1029/2006GL027097
Identification Number: 10.1029/2006GL027097
Depositing User: Sarah Humbert
Date Deposited: 16 Feb 2009 13:02
Last Modified: 23 Jul 2013 10:07
URI: http://eprints.esc.cam.ac.uk/id/eprint/454

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