GMS-5卫星资料和常规地面资料反演大气可降水量  

Retrievals of Total Precipitable Water Using the GMS-5 and Surface Observation Data

作　　者：孙凡[1] 陈渭民[1] 杨昌军[1] 张建平[1] 杜建飞[1] 

机构地区：[1]南京信息工程大学电子工程系,江苏南京210044

出　　处：《南京气象学院学报》2004年第5期641-649,共9页Journal of Nanjing Institute of Meteorology

基　　金：国家自然科学基金资助项目(40175007)

摘　　要：探讨用GMS-5卫星资料结合常规地面资料反演大气可降水量的可行性,建立由3个通道亮温和地面水汽压反演可降水量的经验公式,并分季节进行回归统计,得到不同季节的统计参数。用990组数据对所得到的经验公式进行检验,得探空测值与反演值比较的平均绝对误差为0.1903g/cm2,均方根误差为0.2758g/cm2,相关系数为0.97,具有较高的反演精度。The feasibility for the retrieval of precipitable water (P_W) by using the GMS-5 and surface observation data is discussed.An empirical formula of P_W retrieval using the three channels of brightness temperatures and surface water vapor pressure is presented.And then the parameters in the formula for different seasons are calculated.Test results based on 990 sets of data show that the performance of the formula is higher and its average absolute error,R_(MSE) and correlation coefficient are 0.1903g/cm^2, 0.2758g/cm^2 and 0.97,respectively.

关 键 词：分裂窗 水汽通道 地面水汽压 可降水量 

分 类 号：P426[天文地球—大气科学及气象学]