陕西师范大学学报（自然科学版）2017，Vol.45Issue(1)：87-97,11.DOI:10.15983/j.cnki.jsnu.2017.01.411
陕西秦巴山区TRMM 3B42卫星降水数据精度评价
The accuracy evaluation of TRMM 3B42 precipitation data in Shaanxi Qinling-Daba Mountains
摘要
Abstract
Shaanxi Qinling-Daba Mountains is a typical area which has a complicated terrain.In this area,the study chose the data from 23 rain gauge stations to validate the accuracy of TRMM 3B42 (tropical rainfall measuring mission) precipitation product data over the period of 1998-2014 at different time scales and different terrain region,and evaluated the detecting the occurrence of rainy events for TRMM 3B42 daily precipitation.The results showed that TRMM 3B42 precipitation product had a higher accuracy in the annual,month and quarter timescale,and the accuracy is not good enough in the daily timescale.It showed good performance for detecting the occurrence of rain events with average equitable threat score(SET) of 0.38 in each rain gauge station.TRMM precipitation change process was consistent with the observed precipitation,but there were some differences in precipitation values.From May to October,there was a certain overestimation in the basin area,and some underestimation in the mountain region.The range of overestimation and underestimate was both less than 10％.In the dry season rainfall,TRMM precipitation had a good fit with the observed.Moreover,altitude and average annual precipitation had impacts on data accuracy.The absolute error of precipitation decreased and yet the ability of detecting rain events became weak with the increasing altitude,while the effect of average annual precipitation on data accuracy was opposite.关键词
陕西秦巴山区/TRMM 3B42/降水/尺度Key words
Shaanxi Qinling-Daba Mountains/TRMM 3B42/precipitation/scale分类
天文与地球科学引用本文复制引用
任亮,王晓峰,曾昭昭..陕西秦巴山区TRMM 3B42卫星降水数据精度评价[J].陕西师范大学学报（自然科学版）,2017,45(1):87-97,11.基金项目
国家自然科学基金(41371497) （41371497）
