本文利用温度植被旱情指数(TVDI)和植被供水指数(VSWI)分别对2009、2010年3—10月青藏高原土壤湿度状况进行监测分析,同时利用气象台站实测地面降水资料进行了验证。利用MODIS资料提取的归一化植被指数(NDVI)和地表温度(TS),构建NDVI-TS特征空间,依据该特征空间计算出的反映青藏高原土壤湿度的TVDI与同期累积降水相关性显著;VSWI计算过程简单,但所反映的土壤湿度与同期累积降水的相关性较差。因此,对青藏高原这种范围广、下垫面多变复杂区域而言,TVDI能够更好地反映土壤湿度状况,对干旱监测具有一定的科学意义。 In this paper, the soil moisture of the Tibetan Plateau from March to October in 2009 and 2010 was monitored and analyzed by TVDI and VSWI, respectively. Meanwhile, the ground-based precipitation data were used to verify the data. According to NDVI-TS feature space extracted from MODIS data, the NDVI-TS feature space was calculated. The TVDI, which reflects the soil moisture in the Tibetan Plateau, was significantly correlated with the cumulative precipitation during the same period. The VSWI The calculation process is simple, but the correlation between soil moisture and accumulated precipitation over the same period is poor. Therefore, TVDI can better reflect the soil moisture condition and has certain scientific significance for drought monitoring for such a wide range of complex and underlying underlying complex areas on the Tibetan Plateau.