海洋温跃层分析方法比较

作者：江伟  邢博  楼伟  连仁明

单位：海军海洋水文气象中心, 北京 100161

关键词：温跃层 垂直梯度法 曲率极值点法 拟阶梯函数法

分类号：P731.24

出版年·卷·期（页码）：2016·33·第三期（41-49）

摘要：

比较了垂直梯度法、曲率极值点法和拟阶梯函数法提取温度跃层信息的异同,结果表明:采用曲率极值点法和拟阶梯函数相结合的方法,能够给出较为准确的跃层上下界面位置,即跃层上界选用曲率极值点法和拟阶梯函数法确定跃层上界的最大值,而跃层下界则选用拟阶梯函数的结果。同时利用再分析资料初步诊断分析了西北太平洋冬季、春季、夏季、秋季温度跃层特征信息分布演变特征。

By using the reanalysis numerical data, vertical gradient method, extreme curvature method and quasi-step function approximation method are used to calculate the thermocline structure. Comparison results show that combination of extreme curvature method and quasi-step function approximation method can offer reasonable thermocline structure, i.e., the upper boundary of thermocline can be determined by the larger value between the upper boundaries estimated by extreme curvature method and that by quasi-step function approximation method while the lower boundary is the value estimated by the quasi-step function approximation method.

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