Comparison on the methods of determining the depths of thermocline in the South China Sea
Comparison on the methods of determining the depths of thermocline in the South China Sea
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DOI：
10.11840/j.issn.1001-6392.2016.01.009
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发表时间：
2016-02-01
期刊：
影响因子：
--
通讯作者：
Zhang Rong
中科院分区：
文献类型：
--
作者：
Jiang Bo;Wu Xin-rong;Zhang Rong
利用1986 ~ 2008年中国海洋再分析（CORA）的海温资料，采用3种方法计算了南海温跃层上限深度，并研究了温跃层的季节变化特征。详细比较了三种确定温跃层深度的方法。结果表明，不同方法测得的深度不同，S-T法测得的深度最浅，垂直梯度法测得的深度较浅，高梯度法测得的深度最深。在深水区（水深>200 m），S-T法计算的水深与垂向梯度法计算的水深基本一致，在不同季节都能得到满意的结果。S-T法和高梯度法在浅水区（水深）可以准确地确定无温跃层区
Based on the sea temperature of China Ocean Reanalysis (CORA) from 1986 to 2008, the depths of the upper limit of thermocline in the South China Sea are calculated by using three methods, and the seasonal variation characteristics of the thermocline are studied. Three methods for determining the depths of thermocline are compared in detail. The results show that the depths which are obtained by using different methods are different; the depth determined by the S-T method is the shallowest; the depth from the vertical grads method is shallower; and that from high gradient method is the deepest. The depth calculated by the S-T method is almost equal to that calculated by the vertical grads method in the deep water area (the water depth >200 m) and the results are quite satisfactory under various seasons. The S-T method and the high gradient method can accurately determine no thermocline area in the shallow water area (the water depth