草业学报2017，Vol.26Issue(6)：16-27,12.DOI:10.11686/cyxb2016331
基于MODIS数据的新疆地区土壤湿度反演
Retrieval of soil moisture information in Xinjiang using MODIS
摘要
Abstract
MOD13A2,MOD11A2 and field measurements were utilized to study soil moisture variation in Xinjiang during May and June.Relationships between NDVI (Normalized Difference Vegetation Index) and Ts (Land Surface Temperature),and EVI (Enhanced Vegetation Index) and Ts were investigated.The spatial pattern of the temperature vegetation dryness index (TVDI) and influencing factors were analyzed.Results:(1) NDVI-Ts and EVI-Ts follow the classic triangle relationship.(2) Soil moisture in Xinjiang was mainly dominated by drought conditions (0.6＜TVDI＜0.8);Spatially,Alta,the middle slope area of the Tianshan Mountains,and the south slopes of the Kunlun Mountains are characterized by extremely wet conditions,while the north Junggar basin and southern Tarim Basin are dry.(3) The TVDI of forested land was lowest in May while the TVDI of grassland was lowest in June;soil moisture generally increased with elevation.(4) For regions with high vegetation coverage,EVI based TVDI is more suitable than NDVI based TVDI for drought monitoring.(5) The land surface temperature was better able to reflect drought conditions compared to vegetation index.关键词
温度植被干旱指数/特征空间/地表温度/NDVI-Ts/EVI-TsKey words
temperature vegetation drought index/feature space/Ts/NDVI-Ts/EVI-Ts引用本文复制引用
李海霞,杨井,陈亚宁,郝兴明..基于MODIS数据的新疆地区土壤湿度反演[J].草业学报,2017,26(6):16-27,12.基金项目
中国科学院“率先行动”计划特色研究所主要服务项目(Y674123001)和青年千人计划(Y371051001)资助. （Y674123001）
