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大气科学  2003 

北太平洋副热带海区的两支东向逆流

DOI: 10.3878/j.issn.1006-9895.2003.05.03

Keywords: 副热带逆流,北太平洋,副热带模态水

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Abstract:

分析SODA同化资料(1950~1999年)所描述的北太平洋副热带海区表层一次表层的东向逆流的空间分布和季节变化特征.从气候平均场看,北太平洋副热带的东向流主要包括东、西两部分,其中,太平洋中部夏威夷岛西侧的东支逆流位置偏南,强度夏季最大,春季最弱.海表风应力的旋度异常产生的Ekman抽吸是东支逆流形成的主要原因.位于西太平洋的西支逆流位置偏北,春季一夏季强度较大.西支逆流的形成和季节变化可以由副热带模态水的辐合解释.

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