Evidence for the 8,200 a <Emphasis Type="SmallCaps">b</Emphasis>.<Emphasis Type="SmallCaps">p</Emphasis>. cooling event in the middle Okinawa Trough |
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| Authors: | Email author" target="_blank">Hua?YuEmail author Yingqian?Xiong Zhenxia?Liu Serge?Berné Chi-Yue?Huang Guodong?Jia |
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| Institution: | (1) Department of Earth Sciences, Rice University, Houston, TX 77005, USA;(2) Department of Geosciences, University of Houston, Houston, TX 77204, USA;(3) Marine Geology Division, The First Institute of Oceanography, SOA, Qingdao, 266061, China;(4) IFREMER, Géosciences Marines, P.O. Box 70, 29280 Plouzané, France;(5) Department of Earth Science, National Cheng Kung University, Tainan, 701, Taiwan;(6) Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China |
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| Abstract: | Based on new and existing data on oxygen isotopes, alkenone-surface seawater temperature trends, planktonic foraminifers,
lithology, and clay mineral composition of piston cores, a distinct cooling event has been identified around 8,200 cal a b.p. in the middle Okinawa Trough, northwest Pacific. This corresponds to the 8,200 a b.p. cooling event recorded in many places of the Northern Hemisphere. During this event, the local temperature decreased by
1°C, and the δ18O value increased by 0.6‰. A strengthened Asian winter monsoon is the most probable cause for this event, which thus adds
further credibility to the contention that we are dealing here with a global phenomenon. |
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