山西地区气溶胶垂直分布特征与光学特性的飞机观测研究

利用2013年8月，以Y-12飞机为空中观测平台，搭载PCASP、SMPS、AMS、CCN200、TSI-3563型积分浊度仪和美国MAAP-5012型多角度吸收光度计等多种气溶胶观测仪器，首次对黄土高原大气气溶胶特性开展联合观测的资料，对大气气溶胶粒度，散射和颗粒吸收特性进行了分析，研究了区域气溶胶的空间分布及理化特征.结果表明黄土高原特殊地形区域气溶胶的微物理特性较稳定，但随探测时气象条件的变化，散射系数仍然出现波动；区域气溶胶中以细粒子为主；三个波长散射系数变化趋势非常一致，可以认为探测过程中气溶胶的微物理特性基本不变，而仅仅是浓度在改变；散射系数的变化趋势与体积浓度的变化趋势基本一致；其高值区与大气高湿区的正相关性比较明显；四次探测过程中小尺度粒径的气溶胶粒子为优势粒子；后向轨迹分析可知研究区域大部分气溶胶粒子都来源于高空，由蒙古、内蒙、甘肃、陕西等地远距离输送而来.

Aerosol vertical distribution characteristics and optical properties by aircraft measurements on Loess plateau

In August 2013, We used Y-12aircraft to carry out the experiment, which was equipped with PCASP, SMPS, AMS, CCN200, TSI-3563 type integral turbidity meter, and MAAP-5012 type Multi-angle absorption spectrophotometer from the United States and so on. For the first time,on the loess plateau that atmospheric aerosol joint observation data was obtained, in order to find the aerosol vertical distribution characteristics and optical properties. Results show that aerosol physical properties was stable, but scattering coefficient still fluctuate along with the change of meteorological conditions. the average backward scattering field of three band ratio was 0.13, the aerosol is given priority to with fine particles. Three wavelength scattering coefficient change trend was very consistent, can be thought aerosol micro physical properties basically remain unchanged in the process of detecting, but merely concentration was changed. The change tendency of the scattering coefficient and the volume concentration have almost the same change trend. The obvious positive correlation have been find between the high value area and the atmospheric humidity. Backward trajectory analysis show most of the aerosol particles originated from high altitude, from Mongolia, Inner Mongolia, gansu and shanxi transmitted over a long distance.