Characteristics of imaginary part of aerosol refractive index in some areas of eastern China.
中国东部若干地区大气气溶胶虚折射指数特征

By using integrating plate method, the imaginary part in of aerosol refractive index is measured for the particles sampled at some places with different types of terrains in Eastern China. The measurement results reveal the statistic characteristics of imaginary part ni of aerosol refractive index in Eastern China: 0.080 in cities; 0.063 in suburbs; 0.030 in rural area, 0.012 in mountainous district, which may be taken as the background value of ni in Eastern China, and 0.006 in the South China Sea area. In city and suburb, in values in cool half year(November to next May)are larger than in warm half year's (June to October), and the ni value measured in December is maximum. The ni values in Eastern China except ocean region are larger than in corresponding types of terrains of other countries, which are relevant to the severe coal-fired smoke pollutants in Eastern China.