Changes in Timor Strait hydrology and thermocline structure during the past 130 ka.

Cappelli, E. L., Holbourn, Ann, Kuhnt, Wolfgang and Regenberg, Marcus (2016) Changes in Timor Strait hydrology and thermocline structure during the past 130 ka. Palaeogeography Palaeoclimatology Palaeoecology, 462 . pp. 112-124. DOI http://dx.doi.org/10.1016/j.palaeo.2016.09.010.

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Abstract

Paleostudies of the Indonesian Throughflow (ITF) are largely based on temperature and salinity reconstructions of its near surface component, whereas the variability of its lower thermocline flow has rarely been investigated. We present a multi-proxy record of planktonic and benthic foraminiferal delta O-18, Mg/Ca-derived surface and lower thermocline temperatures, X-ray fluorescence (XRF)-derived runoff and sediment winnowing for the past 130 ka in marine sediment core SO18471. Core 5018471, retrieved from a water depth of 485 mat the southern edge of the Timor Strait close to the Sahul Shelf, sits in a strategic position to reconstruct variations in both the ITF surface and lower thermocline flow as well as to investigate hydrological changes related to monsoon variability and shelf dynamics over time. Sediment winnowing demonstrates that the ITF thermocline flow intensified during MIS 5d-a and MIS 1. In contrast during MIS 5e, winnowing was reduced and terrigenous input increased suggesting intensification of the local wet monsoon and a weaker ITF. Lower thermocline warming during globally cold periods (MIS 4 - MIS 2) appears to be related to a weaker and contracted thermocline ITF and advection of warm and salty Indian Ocean waters. (C) 2016 Elsevier B.V. All rights reserved.

Document Type: Article
Additional Information: Times Cited: 0 Cappelli, Elena Lo Giudice Holbourn, Ann Kuhnt, Wolfgang Regenberg, Marcus
Keywords: Indonesian Throughflow, Timor Sea, Lower thermocline, Hoeglundina elegans Mg/Ca, X-ray fluorescence core scanning
Research affiliation: Kiel University
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
Open Access Journal?: No
DOI etc.: http://dx.doi.org/10.1016/j.palaeo.2016.09.010
ISSN: 0031-0182
Projects: Future Ocean
Date Deposited: 25 Feb 2017 06:58
Last Modified: 23 Sep 2019 23:53
URI: http://oceanrep.geomar.de/id/eprint/36030

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