卫星遥感结合地面观测资料对中国西北干旱区地表热力输送系数的估算

本文利用黑河野外试验 (HEIFE) 地面观测资料, 采用空气动力学方法计算了干旱区内不同下垫面的地表热力输送系数CH, 结合由美国国家海洋和大气局 (NOAA) 系列卫星遥感观测的反映地表植被特征的归一化差值植被指数 (NDVI) 资料, 经拟合得到了针对我国西北干旱区不同下垫面的CH-NDVI参数化关系式, 并对此关系式进行了合理性检验。结果表明: 对于区域尺度而言, 在缺乏用其他方法获得较准确的区域CH值的情况下, 利用卫星遥感结合地面观测资料对其估算是较为可靠的方法。

Estimation of the Surface Thermal Transfer Coefficients over the Arid Region of Northwest China with the Aid of Satellite Remote Sensing and Field Observations

The surface thermal transfer coefficients (CH) of different underlying surfaces over the arid region of Northwest China are calculated using the air dynamics method with the Heihe field experiment (HEIFE) observations, and theCH-NDVI parametric relational expressions are obtained by fitting method with the aid of the normalized difference vegetation index (NDVI) data observed by the National Oceanic and Atmospheric Administration (NOAA) remote sensing satellites, and then the authors make the reasonableness test to them. The results show that estimation of the surface thermal transfer coefficients with the aid of satellite remote sensing and field observations is a credible way under the circumstances of the absence of other accurate methods.