TRMM3B43降水产品在西藏地区的精度检验和应用  

Application and accuracy testing of TRMM3B43 rainfall product in Tibetan Region

作　　者：程珂[1] 朱祯[1] 李铭[1] 万民[1] 王劲廷[2] 

机构地区：[1]中国水电顾问集团成都勘测设计研究院,四川成都610072 [2]四川省气象局气候中心,四川成都610071

出　　处：《水利水电技术》2014年第1期44-46,共3页Water Resources and Hydropower Engineering

摘　　要：以西藏地区38个国家基准站和基本站的实测降水资料,利用双线性插值、相关系数、散点斜率和相对误差等指标,对热带降水测量卫星(TRMM)的3B43降水产品的精度进行检验和分析。结果表明:月尺度上,整体而言TRMM3B43降水产品与实测降水量具有较好的一致性,其中西藏西部和东部喜马拉雅山脉东段北麓地区相关性相对较差,平均相对误差较大。年尺度上TRMM3B43降水产品的相关性不如月尺度好,平均相对误差随统计数值的增大而减小。在应用TRMM3B43降水产品进行流域面雨量估算时,采用气象站点实测降水资料校准TRMM3B43降水产品的T-G联合法,对TRMM3B43降水产品进行订正。Based on the measured rainfall data from 38 national benchmark climate stations and principal stations in Tibet Region,the accuracy of the TRMM （Tropical Rainfall Measuring Mission Satellite） 3B43 rainfall product is tested and analyzed with the indexes of bilinear interpolation,correlation coefficient,relative error and slope of scatter.The result shows that the TRMM3B43 rainfall product is generally consistent with the measured one on the monthly-scale; in which the correlativity between them is poor relatively in the region of the western Tibet and the region of the northern foot of the eastern section of Himalayas in the eastern region of Tibet with larger mean relative error.On the yearly-scale,the correlativity of the TRMM3B43 rainfall product is not as better as it on the monthly-scale and the mean relative error decreases along with the increase of statistical values.When estimating watershed areal precipitation with TRMM3B43 rainfall product,the T-G combined method,i.e.calibrating TRMM3B43 rainfall product with the measured precipitation data,is necessary to be adopted to calibrate the data of TRMM3B43 rainfall product.

关 键 词：降水 热带降水测量卫星(TRMM) TRMM3B43降水产品 应用 西藏地区 

分 类 号：P338[天文地球—水文科学]