北京师范大学学报（自然科学版）2017，Vol.53Issue(1)：111-119,9.DOI:10.16360/j.cnki.jbnuns.2017.01.019
雅鲁藏布江流域TRMM降水数据降尺度研究
TRMM precipitation downscaling in the data scarce Yarlung Zangbo River basin
摘要
Abstract
Moisture migration distance (MMD) and NDVI were used to build a model of TRMM (tropical rainfall measuring mission)precipitation spatial-temporal downscaling for higher temporal-spatial resolution rainfall data production in the data scarce Yalung Zangbo river basin.The model was calibrated and validated using collected station observations in the area.MMD was found to correlate strongly with precipitation in the basin and better significance and representativeness was noted than traditional terrain factor DEM,and could eventually replace DEM in final spatial downscaling model;Accuracy of downscaled TRMM precipitation was found to vary significantly.The monthly R2 between downscaled and observed precipitation also varied from 0.5～0.9.RMSE fluctuated between 3.7 mm and 40 mm.R2 value was no more than 0.1 in some months due to observed extremes.Due to the poor accuracy of original TRMM daily precipitation in this area,the downscaled daily result showed less consistency with the observations,and the R2 was no more than 0.3 at all stations.关键词
降尺度/水汽运移距离/NDVI/TRMM/雅鲁藏布江Key words
downscaling/moisture migration Distance/NDVI/TRMM/Yarlung Zangbo River分类
信息技术与安全科学引用本文复制引用
蔡明勇,吕洋,杨胜天,周秋文..雅鲁藏布江流域TRMM降水数据降尺度研究[J].北京师范大学学报（自然科学版）,2017,53(1):111-119,9.基金项目
国家自然科学基金资助项目(41601471、41271414、41671362),国家863资助项目(2012AA12A310) （41601471、41271414、41671362）
