广州亚运会及残运会期间大气细粒子谱特征分析

2010年广州亚运会及残运会期间利用大气细粒子谱分析仪对广州城区和周边地区进行了大气细粒子谱的连续在线监测.研究了测量获得的粒子数浓度谱,分析了粒子数浓度的日变化特征,并对各个模态的粒子数浓度变化分别进行了研究.结果表明大气中气溶胶粒子主要集中在较小粒径.核模态粒子的数浓度主要受交通排放和气相成核影响,其中大学城站点呈单峰值分布,鹤山站点呈三峰值分布.爱根核模态粒子的数浓度受人类活动和核模态粒子涨大成爱根核模态粒子的影响,大学城站点呈三峰值分布,鹤山站点呈两峰值分布.积聚模态粒子和粗粒子模态粒子的数浓度的显著特点是白天低晚上高.鹤山监测站的粗粒子模态粒子的数浓度谱线受海盐溅沫的影响,在夜间有一峰值.最后分析了降雨对大气细粒子的清除作用.

Characteristics of Aerosol Particle Size Distribution during Guangzhou Asian Games and Paralympic Games

The atmospheric fine particles meter(FPM) was used for continuously in-line monitoring of atmospheric fine particles spectrum during the 2010 Guangzhou Asian Games and Paralympic Games in Guangzhou city and Guangzhou surrounding areas.Characteristics of the partical number concentration curve were analysed. The diurnal variation of particle number concentration was discussed.And the number of particles’ diurnal variation in each mode concentration was discussed respectively.The results show that atmospheric aerosol particles are mainly concentrated in the smaller particle size.The results show that the nucleation mode particles are affected by the process of nucleation and traffic emissions.The curve show a single peak in Guangzhou city station and three-peak in Heshan station.Atiken mode particles are impacted by human activities and nucleation mode particles with curve of three-peak distribution in Guangzhou city station and two-peak distribution in Heshan station.Accumulation mode particles and coarse particle mode particles has a significantly feature that the concentration was lower during the day and higher in the night.With the effect of splashes of salt coarse particle mode particles’ curve has a peak at night in Heshan station.The effect of the rainfall’s scavenging to particles in atmosphere was discussed.