AMSR-E土壤湿度产品在锡林浩特草地样区的精度验证

AMSR-E土壤湿度产品已逐渐应用于气象,农业等各个领域,对土壤湿度的研究,特别是干旱半干旱地区,有着重要的科研和现实意义.为了验证AMSR-E土壤湿度产品在锡林浩特草地的适用性,利用锡林浩特草地野外实验,在3 km×3km范围内,与同经纬度地面9个点的2 cm土壤体积含水量数据作产品精度验证.通过与降水量的比较,验证了AMSR-E土壤湿度产品的可靠性,通过与地面实测值的比较,验证结果表明,AMSR-E反演的平均土壤体积含水量与地面实测平均土壤体积含水量分别为13.3%和11.8%,两者土壤体积含水量的RMSE为3.7%.

Validation of AMSR-E Soil Moisture Products in the Xilinhot Grassland Plots

AMSR-E soil moisture products have been gradually used in meteorology, agriculture and other fields. Studying soil moisture has important significance, especially in arid and semi arid regions. In order to investigate AMSR E soil moisture products in Xilinhot grassland applicability, this paper utilizes field experiments in Xilinhot grassland, which is a 3 km× 3 km area within the AMSR E retrieval region with the same nine point latitude and longitude ground soil moisture compared to validate product precision. Because the relationship between precipitation and surface soil moisture is most closely, the soil moisture inversed from AMSR-E and precipitation data for comparison can validate soil moisture product reliability indirectly. Compared with the ground data, it shows that the AMSR E retrieval value and the ground based measured average soil volumetric water content are 13.3% and 11.8% respectively, and their RMSE is 3.7%.