基于大气辐射传输模型的单通道海表温度反演算法研究  

THE RETRIEVAL OF THE SINGLE-CHANNEL SEA SURFACE TEMPERATURE USING INFRARED RADIATIVE TRANSFER MODEL

作　　者：周旋[1,2] 杨晓峰[1] 吕学珠[1] 李紫薇[1] 陶醉[1] 

机构地区：[1]中国科学院遥感应用研究所 [2]中国人民解放军61741部队

出　　处：《热带气象学报》2012年第5期743-748,共6页Journal of Tropical Meteorology

基　　金：国家海洋局"渤海环境立体监测与动态评价专项"(08Q0090034)资助

摘　　要：在分析大气辐射传输模型基础上,提出了单通道海表温度反演算法。首先,利用像元尺度的大气廓线精确计算大气上行辐射、下行辐射和透过率,然后将这些参数与海水比辐射率代入大气红外辐射传输方程,求解海表温度。与传统的劈窗算法相比,该算法具有时空变化适应性强的特点,尤其适用于缺乏浮标数据的海域。为了验证算法的可行性和准确性,利用2009年全年的MODIS数据在美国西海岸海域进行试验。通过与浮标实测数据比对可发现,单通道海表温度反演算法与浮标实测值的标准方差为0.73℃,平均偏差为0.23℃,说明该算法具有较高的精度,能满足常规的业务观测需求,另外也可用于标定劈窗算法的系数。Based on the analysis of an infrared radiative transfer model, this paper proposes a single channel algorithm to retrieve sea surface temperature. In the retrieval, the atmospheric profiles in pixel scales and seawater emissivities are used as input parameters. The upward and downward radiation and transmission of the atmosphere are accurately computed. The sea surface temperature is derived from radiative transfer equations. This algorithm shows little dependence on space-time position and the availability of buoy data. In order to verify the feasibility and accuracy of the algorithm, the west coast of the United States in 2009 is selected as an experimental region. The root mean square difference between the retrieved sea surface temperature and the buoy data in the overlap region is 0.73 % when the mean bias of the retrieval is 0.23 ℃ The test indicates that this algorithm has satisfactory accuracy. It can meet the needs of the conventional operational observation and can be also used to calibrate the coefficient of split-window algorithm.

关 键 词：单通道 热红外波段 辐射传输 海表温度 

分 类 号：P781.11[天文地球—海洋科学]