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基于海洋分析资料的吕宋海峡水交换的月际变化特征

DOI: 10.11867/j.issn.1001-8166.2015.05.0609, PP. 609-619

Keywords: 吕宋海峡,南海,西北太平洋,水交换,水通量

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Abstract:

利用1993—2006年1~12月AIPO(ThejoiningareaofAsiaandIndianPacificOcean)流场数据,分析了吕宋海峡120°E断面水交换流速结构的平均月际变化特征,并计算了通过该断面的水通量,探讨了水通量及其垂向结构的月际和季节变化特征。结果表明①在断面的南北方向,西向流和东向流分别大致以19.5°N和21.5°N线为界,二者交替相间分布,呈“两进(西向流入南海)两出(东向流出南海)”的结构;21.5°N以南的300m以深和21.5°N以北的1000m以浅海域,常年存在南海水东向流入太平洋。②上层、深层和整个断面的净水通量几乎均为西向流,净水通量冬季最大,春季和秋季次之,夏季最小。中层除12月外,其他各月的净水通量均为东向流出南海,净水通量春季最大,夏季和秋季次之,冬季最小。③整个断面的净水通量,1~5月和8~11月呈“三明治”结构,6~7月呈2层结构;12月呈单层结构,年平均呈“三明治”结构。

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