上海地区气溶胶特征及MODIS气溶胶产品在能见度中的应用

Shanghai aerosol characteristics and application of MODIS aerosol product to retrieval visibility

利用气象站点能见度的历史资料和美国国家宇航局的MODIS卫星遥感手段获取10km×10km分辨率的气溶胶光学厚度(AOD)资料,建立二者的季节平均关系,得到了上海地区季节变化的气溶胶标高,并利用标高数据和AOD的季节分布,反演出上海地区季节变化的区域能见度分布,研究了近地层大气气溶胶与地面能见度的关系,分析了上海地区AOD的特征及能见度的时空分布特征。结果显示:上海地区冬春季平均能见度较差,外环线以内能见度在10km以下;低能见度中心分布明显。

A simple seasonal relation was created linking visual data reported from meteorological stations and MODIS AOD data from space. The seasonal aerosol scale height data were obtained for Shanghai area. Based on these data, the paper analyzed Shanghai aerosol characteristics and derived regional visibility distributions for each season. The results showed that the visibility in spring or winter was not good in Shanghai, especially in downtown with less than 10 km. The low visibility centers were obviously located.