Evidence for the 8,200 a b.p. cooling event in the middle Okinawa Trough
Evidence for the 8,200 a b.p. cooling event in the middle Okinawa Trough
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DOI：
10.1007/s00367-007-0095-x
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发表时间：
2008-06
影响因子：
2.1
通讯作者：
Hua Yu;Yingqian Xiong;Zhenxia Liu;S. Berné;Chi‐Yue Huang;G. Jia
中科院分区：
文献类型：
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作者：
Hua Yu;Yingqian Xiong;Zhenxia Liu;S. Berné;Chi‐Yue Huang;G. Jia
根据氧同位素、烯烃-表面海水温度趋势、浮游有孔虫、岩性和活塞岩心粘土矿物组成的新数据和现有数据，在8,200 cal ab.p左右确定了一个明显的冷却事件。位于太平洋西北部冲绳海槽中部。这相当于8200 ab。p。在北半球许多地方都有记录的降温事件。在此期间，当地气温下降了1℃，δ18O值上升了0.6‰。加强的亚洲冬季季风最有可能是造成这一事件的原因，从而进一步增加了我们在这里处理一个全球现象的论点的可信度。
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 ab.p. in the middle Okinawa Trough, northwest Pacific. This corresponds to the 8,200 ab.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.