【摘要】 在对行星反照率与地表反照率关系理论分析的基础上,利用地表太阳总辐射观测数据,建立了利用NOAA/AVHRR数据估算地表反照率的模型.对每一幅卫星影像,分别确定了模型中系数a、b的值,并据此计算了卫星成像瞬间的地表反照率.计算结果表明,利用建立的地表反照率计算模型估算的月平均地表反照率比较准确地反映了福建省的地表状况.更多还原

【Abstract】 Surface albedo is an important factor of climate system.Construct a model of estimating surface albedo using NOAA/AVHRR data and the observed data of solar global radiation on the earth’s surface,after analyzed theoretically relationship between clear-sky planetary and surface albedo.Because satellite zenith angle and sun elevating angle have great influence on surface albedo,calculate the coefficient a and b in the model independently for every NOAA/AVHRR image and then estimate surface albedo.The results show that monthly mean surface albedo estimated fit the natural ground feature perfectly in Fujian province.更多还原