两种方法测量大气气溶胶折射率的对比分析

针对气溶胶折射率在分析大气气溶胶光学特性中的重要性,介绍两种综合利用黑碳仪、浊度计、光学粒子计数器和微脉冲激光雷达测量大气气溶胶折射率的新方法。两种方法都是根据球形粒子的Mie散射理论计算大气气溶胶的折射率,使用以上两种方法对厦门地区气溶胶折射率进行了计算和对比分析,证明了它们的合理性,分析了它们的测量精度和误差来源。

Analysis on Two Methods of Measuring Refractive Index of Aerosol Particles

Two new methods were proposed for the measurement of refractive index of aerosol by using an aethalometre、an integrating nephelometer、 an optical particle counter and micro pulse lidar. The scattering coefficient and absorption coefficient were measured with the integrating nephelometer and the aethalometre at the same time,the number density distribution of aerosol particle was measured by an optical particle counter with nominated radii. According to the Mie scattering theory, the refractive index of aerosol could be decided with scattering coefficient, absorption coefficient and the number density distribution measured. The refractive index of aerosol could also be decided with extinction coefficient、the number density distribution and backscatteringcoefficient measured by, the micro pulse lidar. At last,the refractive index of aerosol in Xiamen City was calculated using two methods and the feasibility, precision and source oferror were analyzed.