【摘要】 为了解我国新一代静止气象卫星FY-4A辐射成像仪（AGRI）反演大气水汽总量（LPW）产品在海拔高度差异较大区域的适用性，利用2019和2020年6月20日～7月31日四川省11个探空站点观测数据计算大气水汽总量（TPW），对FY-4A LPW进行评估分析。结果表明：FY-4A LPW整体平均偏差为负值，对研究区内大气水汽总量存在低估，低估主要集中在0～4.5 cm的水汽低值区；FY-4A LPW与探空TPW相关性较好，最大相关系数达0.95，在四川地区较为可靠；海拔高度对FY-4A LPW可靠性有直接影响，FY-4A LPW和探空TPW相关系数大小与海拔高度呈负相关。更多还原

【Abstract】 In order to understand the applicability of total precipitation water vapor(LPW) retrieved from the new generation stationary meteorological FY-4A Advanced Geostationary Radiation Imager(AGRI) in the areas with large altitude differences, the total precipitation water vapor(TPW) of FY-4A LPW was caculated by using the observation data of 11 radiosonde sounding stations data in Sichuan province from June 20 to July 31 in 2019 and 2020. The results show that the overall average deviation of FY-4A LPW was negetive, and the total precipitation water vapor was underestimated, especially in the low range of 0～4.5 cm. The FY-4A LPW was highly correlated with radiosonde TPW, the maximum correlation coefficient was 0.95, which was reliable in Sichuan area. And the reliability of FY-4A LPW was affected by altitude. The correlation coefficient between FY-4A LPW and sounding TPW was negatively correlated with altitude.更多还原