利用中红外数据反演海表温度的单通道算法

摘要

Based on the knowledge that atmospheric water vapor has less contribution to the energy received by satellite radiometers in the mid-infrared (IR) band than in the long IR band, this paper proposes a mono-window algorithm for the sea surface temperature (SST) retrieval using the mid-IR band data, which comes from the perspective of atmospheric radiative transfer. The algorithm has the low requirement for the accuracy of atmospheric profiles and has the strong ability to adapt to the space-time change. In order to verify the feasibility and accuracy of this algorithm , the derived SST products were compared with that from both the NOAA National Data Buoy Center ( NDBC) buoy measurements and the MODIS SST retrieval. The results show that the algorithm has the relative good precision and the SST products meet the needs of ocean front, upwelling, ocean eddy and other ocean phenomena detections.%基于中红外波段受大气水汽影响小的特点,从大气辐射传输的角度,提出了利用中红外数据反演海表温度的单通道算法.该算法适用于单通道的中红外数据,时空变化适应性强,对大气温湿廓线等辅助信息的精度要求较低.为了验证该算法的可行性和准确性,将此算法反演的海表温度产品与美国国家数据浮标中心提供的浮标数据及MODISSST标准产品进行了比对验证.结果表明,此单通道算法反演的海表温度达到了较高的精度,能够满足海洋锋面、上升流、海洋涡旋等短周期海洋现象的观测需求.