Variability of Indonesian Throughflow and Borneo Runoff During the Last 14 kyr.

Hendrizan, Marfasran, Kuhnt, Wolfgang and Holbourn, Ann (2017) Variability of Indonesian Throughflow and Borneo Runoff During the Last 14 kyr. Paleoceanography, 32 (10). pp. 1054-1069. DOI 10.1002/2016PA003030.

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Supplementary data:

Abstract

We present a high‐resolution (~20 to 100 years temporal resolution) reconstruction of hydrological changes in the Makassar Strait over the last 14 kyr from Core SO217‐18517 retrieved off the Mahakam Delta (1°32.198′S, 117°33.756′E; 698 m water depth) during the SO217 Makassar‐Java Cruise. Sea surface temperatures, based on Mg/Ca of Globigerinoides ruber and alkenone UK′37, and seawater δ18O reconstructions, based on G. ruber δ18O and Mg/Ca, in combination with sortable silt grain size measurements and X‐ray fluorescence (XRF) core scanner derived elemental data provide evidence for increased precipitation during the Bølling‐Allerød (BA) and early Holocene and for warmer and more saline surface waters and a decrease in the intensity of the Indonesian Throughflow (ITF) during the Younger Dryas (YD). XRF derived Log (Zr/Rb) records, sortable silt data and increased sedimentation rates indicate decreased winnowing, interpreted as a slowdown of the ITF thermocline flow during the YD. We attribute this decline in ITF intensity to slowdown of the Atlantic meridional overturning circulation during the YD. We suggest that changes in Makassar Strait surface hydrology during this interval of Northern Hemisphere cooling and Southern Hemisphere warming were related to a southward displacement of the Intertropical Convergence Zone.

Document Type: Article
Keywords: ITF Makassar Strait Younger Dryas Borneo runoff
Research affiliation: Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Kiel University
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1002/2016PA003030
ISSN: 0883-8305
Projects: Future Ocean
Date Deposited: 18 Jan 2018 12:22
Last Modified: 25 Apr 2019 10:12
URI: http://oceanrep.geomar.de/id/eprint/41637

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