Stable isotopes and sea surface temperature on planktic foraminifera of sediment core WIND 28K


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).

all measurements were carried out on the 300-355 ym fraction

Supplement to: Kiefer, Thorsten; McCave, I Nick; Elderfield, Henry (2006): Antarctic control on tropical Indian Ocean sea surface temperature and hydrography. Geophysical Research Letters, 33(24), L24612

Related Identifier
Metadata Access
Creator Kiefer, Thorsten; McCave, I Nick ORCID logo; Elderfield, Henry
Publisher PANGAEA
Publication Year 2006
Rights Creative Commons Attribution 3.0 Unported;
OpenAccess true
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 1132 data points
Discipline Earth System Research
Spatial Coverage (51.013 LON, -10.154 LAT); SW Indian Ocean