Age model and sedimentation rate of core M174/KL11 (Table 1)

Stable isotope and faunal records from the central Red Sea show high-amplitude oscillations for the past 380,000 years. Positive delta18O anomalies indicate periods of significant salt buildup during periods of lowered sea level when water mass exchange with the Arabian Sea was reduced due to a redu...

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Bibliographic Details
Main Authors: Hemleben, Christoph, Meischner, Dieter, Zahn, Rainer, Almogi-Labin, Ahuva, Erlenkeuser, Helmut, Hiller, Birgit
Format: Dataset
Language:English
Published: PANGAEA 1996
Subjects:
Age model
SPECMAP chronology
Imbrie et al. (1984)
Calculated
DEPTH
sediment/rock
GeoTü
Isotopic event
M174/Kl11
Paleoceanography at Tübingen University
PC
Piston corer
Red Sea
Sedimentation rate
Indian
Planktonic foraminifera
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.52727
https://doi.org/10.1594/PANGAEA.52727
Description
Summary:Stable isotope and faunal records from the central Red Sea show high-amplitude oscillations for the past 380,000 years. Positive delta18O anomalies indicate periods of significant salt buildup during periods of lowered sea level when water mass exchange with the Arabian Sea was reduced due to a reduced geometry of the Bab el Mandeb Strait. Salinities as high as 53 per mil and 55 per mil are inferred from pteropod and benthic foraminifera delta18O, respectively, for the last glacial maximum. During this period all planktonic foraminifera vanished from this part of the Red Sea. Environmental conditions improved rapidly after 13 ka as salinities decreased due to rising sea level. The foraminiferal fauna started to reappear and was fully reestablished between 9 ka and 8 ka. Spectral analysis of the planktonic delta18O record documents highest variance in the orbital eccentricity, obliquity, and precession bands, indicating a dominant influence of climatically - driven sea level change on environmental conditions in the Red Sea. Variance in the precession band is enhanced compared to the global mean marine climate record (SPECMAP), suggesting an additional influence of the Indian monsoon system on Red Sea climates.

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