冲绳海槽南部两万年来的浮游有孔虫与古海洋学事件

李保华; 赵泉鸿; 王永吉; 翦知; 陈荣华

冲绳海槽南部两万年来的浮游有孔虫与古海洋学事件

1.
同济大学海洋地质开放实验室, 上海
2.
国家海洋局第一海洋研究所, 青岛
3.
国家海洋局第二海洋研究所, 杭州

基金项目: 国家“八五”攻关项目;国家自然科学基金

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- 文章访问数: 829
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- 被引次数: 0
出版历程
- 收稿日期: 1995-11-29
- 修回日期: 1996-09-06

摘要

摘要: 冲绳海槽南部92-255和92-170两柱状样岩心的浮游有孔虫定量分析及其组合的变化、游浮与底栖有孔虫壳体δ¹⁸O测定和AMS¹⁴C测年资料,提供了末次冰期以来重要的古海洋学记录。浮游有孔虫的转换函数计算表明,海槽区末次冰期表层水温下降值及末次冰期的季节温差均比西太平洋开放海区相应纬度大,反映了边缘海对冰期-间冰期旋回中气候变化的放大效应,冰期-冰后期的对比还体现在由浮游有孔虫属种组合所反映的水团和水体垂直结构的变化上;末次冰消期古温度变化及浮游有孔虫δ¹⁸O变化记录了一次短暂的气候回返(10170～9170aBP);详细的地层分析还揭示了中全新世的一次Pulleniatina obliquiloculata含量低谷。
- 浮游有孔虫 /
- 冲绳海槽 /
- 古海洋学事件

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参考文献(17)

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