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

[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...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Kiefer, T., McCave, I. N., Elderfield, H.
Format: Article in Journal/Newspaper
Language:English
Published: 2006
Subjects:
01 - Climate Change and Earth-Ocean Atmosphere Systems
Antarctic
Indian
The Antarctic
Antarc*
Online Access:http://eprints.esc.cam.ac.uk/454/
http://eprints.esc.cam.ac.uk/454/1/ElderfieldAntarctic.pdf
https://doi.org/10.1029/2006GL027097
Description
Summary:[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).

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