我国西北地区气溶胶垂直分布特征分析

Aerosol Vertical Distribution Characteristics in Northwest China

气溶胶标高是反映气溶胶浓度和消光系数廓线垂直分布特性的一个重要物理量.使用微脉冲激光雷达测量了我国西北典型地区的气溶胶消光系数廓线;使用太阳光度计测量了大气的垂直光学厚度;对测量数据进行拟合,得到了气溶胶标高.结果表明,两种方法得到的气溶胶标高具有很好的线性相关性,相关系数大于0.87.对该地区的气溶胶标高进行了统计分析,得到气溶胶标高随时间、地域及气候条件的变化关系.该研究对了解西北地区的气溶胶变化特征和建立气溶胶模式具有一定的参考意义.

Aerosol scale height is one of the important quantities,and it indicates the aerosol concentration and the vertical distribution characteristics of extinction coefficient profile.The aerosol extinction coefficient profile is obtained with micro pulse lidar in northwest China,and the atmosphere vertical optical thickness is measured by sun-photometer.We can obtain aerosol scale height by fitting the measured data.Results show that the aerosol scale heights obtained by the two different methods have a good linear correlation,and the correlation coefficient is larger than 0.87.A statistical analysis for aerosol scale height in northwest China is carried out.The variation in aerosol scale height with time,region and climate condition is presented.The research has significance in studying the characteristics of aerosol variation in northwest China and establishing aerosol patterns.