中文摘要：

利用WPS(宽范围颗粒粒径谱仪)、雨滴谱仪和雾滴谱仪测量了2007～2008年冬季南京北郊大气气溶胶数浓度谱分布和降水强度,分析了气溶胶粒子的分布特征以及气溶胶粒径与湿清除系数的关系。结果表明:气溶胶粒子具有明显的双峰型日变化特征,数浓度主要集中在0.02～0.2μm粒径范围内,受汽车尾气排放、混合层高度变化以及颗粒物水平输送的影响较大。降雨、降雪和雾过程都对气溶胶粒子有不同程度的清除,降雨和浓雾对核模态和粗模态的气溶胶粒子的清除能力显著,降雪对粒径小于0.03μm的气溶胶粒子的清除能力较强。

英文摘要：

Measurements of aerosol particle number concentrations and precipitation intensity during the winter of 2007-2008 were made by Wide-Range Particle Spectrometer(WPS),disdrometer (OTT Parsivel) and fog monitor (FM-100),in the north suburb of Nanjing. The size distribution characteristics of particles and the relationships between particle size and scavenging coefficients were studied. With a bimodal distribution of diurnal variation,the aerosol particle number concentration,which is much affected by vehicle e...