2004年秋季江苏省干旱遥感监测研究

ON MONITORING OF DROUGHT IN JIANGSU PROVINCE OF 2004 AUTUMN USING REMOTE SENSING DATA

2004年秋季,江苏省绝大多数地区降水明显比常年偏少,丘陵及高岗地区受旱严重。为了直观获得全省干旱空间分布情况,采用“表观热惯量指数”方法,结合2004年11月8日NOAA/AVHRR资料反演的地表反照率和昼夜地表温度,生成了江苏省“表观热惯量指数”空间分布图,获取了全省干旱空间分布情况,并在2004年11月9—14日全省出现2—6 d的降水过程后,利用2004年11月18日卫星资料,及时分析了全省旱情缓解情况,取的了很好的监测结果。

In 2004 autumn, precipitation quantity in Jiangsu province is noticeably smaller than norreals. Hilly counties suffer more serious drought. In order to get the spatial distribution information of drought,remote sensing data are used to monitor the drought. Using method of Apparent Thermal Inertia （ATI） index, spatial distribution map of ATI index of Jiangsu province are generated, with the NOAA/ AVHRR retrieval data of land surface albedo and temperature of November 8,2004. After a precipitation process from November 9 to November 14,2004,spatial distribution map of ATI index of jiangsu province are generated too, with the NOAA/AVHRR retrieval data of November 18,2004. Using the two maps mentioned above,drought conditions in Jisangsu Province are displayed thoroughly.