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末次盛冰期以来苏拉威西海区上层海水对快速气候变化的响应
  • 摘要

    通过对苏拉威西海MD98-2178站位浮游有孔虫定量分析、表层浮游有孔虫Globigerinoides ruber壳体镁钙(Mg/ca)比值反演海表温度(SST),并结合表层和次表层浮游有孔虫氧、碳同位素,探讨末次盛冰期以来,苏拉威西海区温度、盐度、生产力、温跃层深度变化及其对快速气候变化的响应.研究发现:末次盛冰期苏拉威西海区,海表温度存在明显降温,较现代海表温度下降了2.9℃,但缺乏对快速气候波动明显响应.MD98-2178站位盐度、生产力以及温跃层深度等记录,则明显响应快速气候波动,在H1,YD等变冷事件期间,盐度变高、生产力上升、温跃层深度变浅,指示东亚冬季风加强,热带辐合带(ITCZ)南移以及印度尼西亚穿越流(ITF)减弱.末次盛冰期以来,MD98-2178站位属种组合、生产力、盐度以及温跃层深度在11kaB.P.左右存在明显的突变.且在南海、印尼海区普遍存在,指示了该海域在11kaB.P.左右存在霞要的气候变化过程.

  • 作者

    褚智慧  翦知湣  乔培军  成鑫荣  边叶萍  Chu Zhihui  Jian Zhimin  Qiao Peijun  Cheng Xinrong  Bian Yeping 

  • 作者单位

    同济大学海洋地质国家重点实验室,上海,200092

  • 刊期

    2011年2期 ISTIC PKU

  • 关键词

    苏拉威西海区  上层海水  快速气候变化响应  11kaB.P.气候变化 

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