New constraints on the timing of sea level fluctuations during early to middle marine isotope stage 3

被引：59

作者：

Rohling, E. J. ^{[1
]}

Grant, K. ^{[1
]}

Hemleben, C. ^{[2
]}

Kucera, M. ^{[2
]}

Roberts, A. P. ^{[1
]}

Schmeltzer, I. ^{[2
]}

Schulz, H. ^{[2
]}

Siccha, M. ^{[2
]}

Siddall, M. ^{[3
]}

Trommer, G. ^{[2
]}

机构：

[1] Univ Southampton, Natl Oceanog Ctr, Southampton SO14 3ZH, Hants, England

[2] Univ Tubingen, Inst Geosci, D-72076 Tubingen, Germany

[3] Lamont Doherty Earth Observ, Palisades, NY 10964 USA

来源：

PALEOCEANOGRAPHY | 2008年 / 23卷 / 03期

基金：

英国自然环境研究理事会;

关键词：

D O I：

10.1029/2008PA001617

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

To settle debate on the timing of sea level fluctuations during marine isotope stage (MIS) 3, we present records of delta O-18(ruber) (sea level proxy) and magnetic susceptibility from the same samples within the single sediment archive (i.e., ``coregistered'') of central Red Sea core GeoTu-KL11. Core-scanning X-ray fluorescence and environmental magnetic data establish the suitability of magnetic susceptibility as a proxy for eolian dust content in Red Sea sediments. The eolian dust data record similar variability as Greenland delta O-18(ice) during early to middle MIS 3, in agreement with previous observations that regional Arabian Sea climate fluctuated with a timing similar to that of Greenland climate variations. In contrast, the sea level record fluctuates with a timing similar to that of Antarctic-style climate variations. The coregistered nature of the two records in core KL11 unambiguously reveals a distinct offset in the phase relationship between sea level and eolian dust fluctuations. The results confirm that sea level rises, indicated by shifts in Red Sea delta O-18(ruber) to lighter values, occurred during cold episodes in Greenland during early to middle MIS 3. This indicates that the amplitudes of the reconstructed MIS 3 sea level fluctuations would not be reduced by inclusion of regional climate fluctuations in the Red Sea sea level method. Our analysis comprehensively supports our earlier conclusions of large-amplitude sea level variations during MIS 3 with a timing that is strongly similar to Antarctic-style climate variations.

引用

页数：8

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