An evaluation of soil moisture from AMSR-E oversource area of the Yellow River,China

作者：TangTang Zhang,Mekonnen Gebremichael,Akash Koppa,XianHong Meng,Qun Du,Jun Wen

摘要：In this study,in-situ soil moisture measurements are used to evaluate the accuracy of three AMSR-E soil moisture prod ucts from NASA(National Aeronautics and Space Administration),JAXA(Japanese Aerospace Exploration Agency)and VUA(Vrije University Amsterdam and NASA)over Maqu County,Source Area of the Yellow River(SAYR),China.Re sults show that the VUA soil moisture product performs the best among the three AMSR-E soil moisture products in the study area,with a minimum RMSE(root mean square error)of 0.08(0.10)m3/m3 and smallest absolute error of 0.07(0.08)m3/m3 at the grassland area with ascending(descending)data.Therefore,the VUA soil moisture product is used to describe the spatial variation of soil moisture during the 2010 growing season over SAYR.The VUA soil moisture product shows that soil moisture presents a declining trend from east south(0.42 m3/m3)to west north(0.23 m3/m3),with good agreement with a general precipitation distribution.The center of SAYR presents extreme wetness(0.60 m3/m3)dur ing the whole study period,especially in July,while the head of SAYR presents a high level soil moisture(0.23 m3/m3)in July,August and September.

发文机构：Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions Department of Civil and Environmental Engineering Zoige Wetland and Ecosystem Research Station State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry College of Atmospheric Sciences

关键词：AMSR-ESOILMOISTUREPRODUCTSSOILMOISTUREgroundmeasurementssourceareaoftheYellowRiverAMSR-ESOILMOISTUREPRODUCTSAPPLICABILITY

分类号： S15[农业科学—土壤学][农业科学—农业基础科学]