用MODIS数据反演辽西北地区陆面温度

Retrieval of land surface temperature using MODIS data in northwestern liaoning

针对MODIS多波段的特点,用1、4、3波段合成真彩色图像,2、19波段反演水汽含量,最后用31、32波段和分裂窗算法反演辽西北地区陆面表面温度。结果表明:渤海附近站点的地温相对较低,地温海陆分布差异明显;研究区内各站点反演结果都在20℃以上,符合实际情况;反演结果与观测数据的多年平均值在空间分布上基本呈相似的趋势,结果比较合理。

According to the multiband character of MODIS , actual color image is composed of 1,3,4 bands,the water content is derived from 2,19 bands,finally, the land surface temperature （LST） of Northwestern Liaoning is retrieved using 31,32 bands and the split-window algorithm, the result showing： the LST of sites which near Bohai Sea is relatively low, the distribution of LST is different obviously between sea and land;all of the LST retrieved of sites in the researched area is above 20℃,that accord with the actual conditions;the retrieved LST and the average for many years of the observed data have the similar trend basically in space distribution and the result is more rational.