南海海域BT资料、南森站资料计算温跃层——三项示性特征的比较

Thermocline Comparison of SCS Using BT and Nansen Data

南海海域海水温度调查资料主要为 BT 资料和南森站资料两种类型，为比较两种资料计算的温度跃层三项示性特征的区别，本文用同一种温跃层识别、统计方法分别对两种类型资料进行了判别和统计，在此基础上，绘制了南海冬、夏季跃层强度分布图。结果表明，两种类型的调查资料在计算浅温度跃层强度和上界深度上有较明显区别，BT 资料的温跃层强度计算结果大于南森站资料，温度跃层上界较南森站资料深，温跃层厚度亦有差别，但规律不明显。两种类型资料对深温度跃层三项示性特征值的计算结果差异不明显。

The temperature investigation methods of Nansen data and BT data are different, which are the main types of data in SCS. In order to compare the difference of thermocline using these two types of data, we calculate both kinds of historical data using the same method. We get the results: The thermocline intensity and upper boundary depth of Nansen data are different from BT data. For the upper thermocline the result of the thermocline intensity using BT data is higher than using Nansen data, and the upper boundary depth is deeper, the shallow thermocline is even obvious. Tere also exits differences in thermocline thickness, but the regularity is not clear.