Analysis on Aerosol Concentration of Beijing during 1998～2001
北京市1998～2001年大气气溶胶粒子数浓度分析

Based on the analysis of aerosol concentration from 1998 to 2001, some of the aerosol variance characteristics and tendency of Beijing atmosphere were got, in addition, the influence on aerosol concentration from the dust weather was analyzed.The research results show that aerosol number concentration of Beijing decreased annually from 1998, but increased in June of 2001.The daily variance of aerosol number concentration is different from that in the 1980s.Aerosol number concentration has a close relationship with dust weather.