Validation and Understanding of Moderate Resolution Imaging Spectroradiometer (MODIS) C005 Aerosol Product using Aerosol Robotic Network (AERONET) Ground-Based Data in the North of China

摘要

Beijing and Xianghe sites are selected as study area. MODIS/Terra C005 aerosol product of the whole 2005 year is validated by matching the MODIS product and AERONET within ?±30 min of MODIS/Terra overpass times considering the aerosol movement velocity of given sites, then to analyze their applicability. The results show that MODIS C005 aerosol product overestimates the real value greatly at Beijing site, for that the reflectance in the bright surface is not really described, and the urban aerosol characteristic could not be defined exactly. MODIS C005 product is very accurate and reliable at Xinaghe site except in winter, could be used. The results show that the method of the surface reflectance determination used in the new algorithm is feasible, but is not suitable to all types of surface. Otherwise, season characteristics of two sites are analyzed in detail.