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Detailed Reference Information |
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: doi: 10.1029/2006PA001278. issn: 0883-8305. |
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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 δ18O measurements of surface- and thermocline-dwelling planktonic foraminifers (G. ruber and P. obliquiloculata) indicate an increase of >4¿C in both surface and thermocline water temperatures during Termination II. Tropical sea surface temperature changed synchronously with ice volume (benthic δ18O) 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. |
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Abstract |
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Keywords
Paleoceanography, Sea surface temperature, Paleoceanography, Micropaleontology (0459, 3030), Global Change, Regional climate change, Atmospheric Processes, Paleoclimatology (0473, 4900) |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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