Changes in the vertical profile of the Indonesian Throughflow during Termination II: Evidence from the Timor Sea

Xu, J., Kuhnt, W., Holbourn, A., Andersen, N. and Bartoli, G. (2006) Changes in the vertical profile of the Indonesian Throughflow during Termination II: Evidence from the Timor Sea Paleoceanography, 21 (4). DOI Pa420210.1029/2006pa001278.

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Abstract

[ 1] We use a multiproxy approach to monitor changes in the vertical profile of the Indonesian Throughflow as well as monsoonal wind and precipitation patterns in the Timor Sea on glacial-interglacial, precessional, and suborbital timescales. We focus on an interval of extreme climate change and sea level variation: marine isotope (MIS) 6 to MIS 5e. Paleoproductivity fluctuations in the Timor Sea follow a precessional beat related to the intensity of the Australian (NW) monsoon. Paired Mg/Ca and delta(18)O measurements of surface- and thermocline-dwelling planktonic foraminifers ( G. ruber and P. obliquiloculata) indicate an increase of > 4 degrees C in both surface and thermocline water temperatures during Termination II. Tropical sea surface temperature changed synchronously with ice volume (benthic delta(18)O) during deglaciation, implying a direct coupling of high- and low-latitude climate via atmospheric and/or upper ocean circulation. Substantial cooling and freshening of thermocline waters occurred toward the end of Termination II and during MIS 5e, indicating a change in the vertical profile of the Indonesian Throughflow from surface- to thermocline-dominated flow.

Document Type: Article
Keywords: south china sea isotope substage 5e east-asian monsoon planktonic-foraminifera surface temperature tropical pacific indian-ocean equatorial pacific carbon flux circulation
Research affiliation: Kiel University > Faculty of Mathematics and Natural Sciences > Institute of Geosciences
Kiel University > Other > Leibniz-Laboratory for Radiometric Dating and Isotope Research
UNSPECIFIED
Kiel University > Other > Leibniz-Laboratory for Radiometric Dating and Isotope Research
DOI etc.: Pa420210.1029/2006pa001278
ISSN: 0883-8305
Date Deposited: 12 Jan 2012 05:20
Last Modified: 08 Oct 2012 10:24
URI: http://eprints.uni-kiel.de/id/eprint/16033

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