利用海表动力高度资料反演次表层海温结构

Retrieval of subsurface temperature with sea surface dynamic height data

为了解次表层温盐结构特征,提出基于谱空间重构的方法,利用海表动力高度资料对次表层海温进行反演,分析该方法的数学原理并给出计算步骤.反演结果表明该方法是可行的.反演均方根误差为0.8703℃,误差主要是由谱空间统计模式及只考虑海表动力高度影响造成的;反演得到的次表层海温场误差主要分布在温跃层附近区域.

A method based on spectral space reconstruction was developed to investigate subsurface thermohaline structure. Sea surface dynamic height （Dyh） data was used to retrieve sea subsurface temperature （Tsub）. The mathematical principle of the method was analyzed and the calculation steps were given. Resuits indicate that the proposed method is effective and the mean square root error （RMS） of sea subsurface temperature was 0. 8703℃. The error is mostly caused by temporal statistical mode and temporal truncation, and the primary error area is somewhere about thermocline fields.