北方局地夏末气溶胶光学特性综合观测分析

本文对中国北方相近地理经度不同纬度的三个试验点（内蒙草原生态定位站、北京、新乡）夏末季节大气气溶胶特性进行了地面粒子计数和整层光学遥感等综合观测。分析结果表明，这三个试验点地面和整层气溶胶数浓度通常有内蒙较小，北京居中，新乡最大的特征。文中提出了浓度比这个参量，它可以定量描述地面源气溶胶对整层大气气溶胶的相对贡献。据此分析可知内蒙地面源较弱，与该地区人类活动稀少相对应。由浓度比推测，新乡除近地面城市空气污染较严重外，滨临的黄河河面水汽蒸发作用也是促成气溶胶浓度增大的原因。

Analyses of Composite Observations of Optical Properties of Atmospheric Aerosols in the Late Summer over Some Areas of North China

The composite observations -with a dust counter and solar spectrometer for optical remote sensing of atmospheric aerosol optical properties have been conducted in late summer in three places of North China; Innermongolia Grassland Ecosystem Research Station, Beijing and Xinxiang. The three places are at nearly the same longtitude but different latitudes. The results show that the concentrations of aerosol particles both in the near surface layer and in the Whole atmospheric layer carry obvious geographical characteristic. Namely, the tWo concentrations are most heaVy in Xinxiang, median in Beijing and smallest in Innermongolia. A parametCrized concentration ratio is presented in this paper for the first time, which can be used to quantify the relative contribution of the surface aerosol sources to the whole atmospheric column aerosols. It can be found that the surface aerosol source in Innermongolia is weaker because of less human activity. The reasons for heaVy concentration of atmospheric aerosols in Xinxiang are its geographical position near by the Yellow myer which evaporates an enormous amount of water into the atmosphere to facilitate the generation of aerosols as well as its serious urban air pollution.