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热带西太平洋和南印度洋近20年来的海面高度变化及其动力联系

DOI: 10.1007/s11430-014-5048-4, PP. 665-675

Keywords: 海面高度,波导通道,热带太平洋,南印度洋,年际和年代际变化

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Abstract:

?利用卫星遥感和现场观测资料,结合线性Rossby波诊断解,研究了近20年热带太平洋和印度洋暖池区海面高度的快速升高趋势.结果表明,两大洋热带区域同步的海面上升趋势通过印度尼西亚海的海洋波导通道联系在一起,其动力关联主要发生在温跃层深度,表现为热带太平洋的海面高度低频波动信号通过印度尼西亚海传至印度洋,并影响到南印度洋的东部海区,而南印度洋西部的海面变化主要受印度洋内区局地风场的调制.超前-滞后相关分析的结果表明,东南印度洋海面高度的年际和年代际变化信号分别源自太平洋赤道和近赤道海区,分别受到了太平洋赤道风应力异常和近赤道风应力旋度异常的调控,并且分别与ENSO的年际过程和PDO的年代际过程密切相关.

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