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南极普里兹湾及其邻近海域的水文结构特征和底层水的来源

, PP. 11-20

Keywords: 南极普里兹湾,水文结构特征,底层水

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Abstract:

利用中国第九次南大洋考察中南极普里兹湾及其邻近海域的CTD资料,分析研究了调查海域的水文结构特征及其该区南极底层水(AABW)的来源.研究结果表明,在研究海域,深水洋区近表层流由西向东流,而在普里兹湾内存在一个气旋型涡.水文结构中最明显的海洋学特征是:(1)绕极深层水(CDW)的涌升现象明显,涌升最强的位置是麦克罗伯逊地以北海域,最明显的深度是50~200m层,暖水涌升将冬季冷水分隔成南北两部分,并在其中形成孤立的暖水块;(2)陆缘水边界明显,这是绕极深层水与南极冷水之间形成的锋面,一般处在次表层水中,大致位于64°~66°S之间;(3)存在着双跃层结构.观测期间,普里兹湾以北探水海域存在着南极底层水,其来源可能有二:一为当地形成,二为源于威德尔海和罗斯海.

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