利用卫星观测海面信息反演三维温度场

Reconstruction of ocean temperature profile using satellite observations

基于历史观测的温盐剖面资料,采用回归分析方法统计出海面温度异常、海面动力高度异常与温度剖面异常之间的相关关系;然后利用高分辨率的卫星遥感海表面温度(SST)和卫星观测海面高度(SSH)信息重构了三维海洋温度场。在台湾岛周边海域建立了时间分辨率为天、空间分辨率为0.25°×0.25°的三维温度分析场。通过与实测资料的比较分析,文章所构建的分析场能够较好地描述海洋三维温度场的结构特征,能够较为真实地反映海洋的中尺度变化过程。该分析场可以作为海洋数值模式的初始场,也可以作为"伪观测"同化到海洋数值再分析和预报系统中,进而改善三维温、盐、流的数值再分析和预报。

The correlation between sea surface temperature（SST） anomaly,sea surface dynamic height（SSH） anomaly and temperature profile anomaly is constructed by using regression analysis,which is based on the historical temperature-salinity profiles.Combined with the correlation,satellite SST and satellite SSH reconstruct a three-dimensional temperature field,whose temporal resolution is daily and spatial resolution is 0.25°×0.25° near Taiwan Island.Compared with the observational temperature profiles,the reconstructed temperature field can represent the property and structure of the temperature field and better describe meso-scale variability of the ocean temperature filed.This analysis field can serve as not only the initial field of a numerical model but also pseudo temperature observation,which may be assimilated into the system of ocean reanalysis and forecast in order to improve the output.