【摘要】 使用光学粒子计数器测量直径0. 3～12. 0μm气溶胶粒子谱分布。结果表明,2001年12月10—31日重庆市区冬季气溶胶粒子的平均个数为676. 46个/cm~3;气溶胶粒子以细粒子为主,占总粒子数的98%;大气气溶胶粒子数浓度有明显的日变化,呈单峰单谷型,峰值出现在11:00;降水、风速对气溶胶粒子的浓度有明显影响;雾对气溶胶粒子浓度有湿清除作用;大气层结稳定对气溶胶粒子的扩散、稀释不利。更多还原

【Abstract】 0. 3 ～ 12. 0 μm diameter aerosol particle spectrum was measured using optical particle counters. The results showed that the average number of aerosol particles in Chongqing in winter was 676. 46 pcs/cm~3 on December 10-31 st,2001. Aerosol particles were dominated by fine particles,accounting for 98% of the total number of particles. There was obvious daily variation in its concentration with the peak of unimodal distribution appearing at 11 o’clock in the morning. Precipitation and wind speed have obvious influence on the concentration of aerosol particles. Fog has wet scavenging effect. The stability of atmospheric junction is very unfavorable to the diffusion and dilution of aerosol particles.更多还原