利用分裂窗算法反演陆地表面温度的研究进展  

PROGRESS IN SPLIT-WINDOW ALGORITHMS FOR RETRIEVING LAND SURFACE TEMPERATURE

作　　者：俞宏[1] 石汉青[1] 

机构地区：[1]解放军理工大学气象学院,南京211101

出　　处：《气象科学》2002年第4期494-500,共7页Journal of the Meteorological Sciences

摘　　要：本文对LST反演的分裂窗算法作了回顾和比较。LST反演的分裂窗算法最一般的形式是Ts=T4+A（T4-T5）+B,其中Ts是陆地表面温度,T4和T5分别是AVHRR分裂窗通道4和5的亮温度,A和B是由大气、观测角及地表辐射率所决定的系数,不同的算法其系数的确定有很大的不同。地表比辐射率的确定是LST反演中的主要难点,目前也有多种方法来确定地表比辐射率值。最后本文还指出了目前在LST反演中存在的局限性。In this paper,various split-window algorithms have been reviewed and compared to understand their differences. Different algorithms differ in both their forms and the calculation of their coefficients. The most popular form of split-window algorithm is TS = T4 +A(T4-T5)+B, where Ts is land surface temperature, T4 and T5 are brightness temperatures of AVHRR channels 4 and 5, A and B are coefficients in relation to atmospheric effects, viewing angle and ground emissivity. In addition, several methods for estimating ground e-missivity have also been reviewed. In the end,we pointed out the limitations of current LST study and also the promising application of remote sensing to examine LST change and distribution in the real world.

关 键 词：分裂窗算法 反演 陆地表面温度 地表比辐射率 大气 观测角 

分 类 号：P423.3[天文地球—大气科学及气象学]