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 sync...

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Bibliographic Details
Main Authors: Kiefer, Thorsten, McCave, I Nick, Elderfield, Henry
Format: Dataset
Language:English
Published: PANGAEA 2006
Subjects:
AGE
Calculated
Calculated from Mg/Ca ratios (Anand et al.
2003)
CD129
Charles Darwin
Cibicidoides wuellerstorfi
δ18O
DEPTH
sediment/rock
Foraminifera
planktic
mass per shell
Globigerinoides ruber white
Magnesium/Calcium ratio
δ13C
Graphite furnace atomic absorption spectrometer (GF-AAS)
Isotope ratio mass spectrometry
KAL
Kasten corer
Neogloboquadrina dutertrei
Sea surface temperature
annual mean
SW Indian Ocean
Thermocline water temperature
WIND
WIND-28K
Antarc*
Antarctic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.610271
https://doi.org/10.1594/PANGAEA.610271
Description
Summary: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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