【摘要】 利用2001—2002年重庆冬季大气气溶胶粒子观测资料,分析了气溶胶粒子的数浓度、质量浓度、谱分布、化学元素组成及其与气象因子的关系。结果表明,重庆冬季大气气溶胶数浓度与我国其他大城市处于同一水平,大于0.3μm气溶胶粒子的平均数浓度为225.3个/cm3(最大337.8个/cm3);冷空气入侵和降水是局地气溶胶的主要清除机制,雾的存在可以显著地改变气溶胶数浓度的一般日变化规律;PM10占TSP(Total Suspended Particles,总悬浮颗粒物)质量浓度的60%~80%;人为污染元素S、Zn、As、Pb等在细粒子中富集较高。更多还原

【Abstract】 On the basis of atmospheric aerosol observations collected in Chongqing in winter of 2001—2002,the analysis of physical and chemical characteristics of aerosol,such as number concentration,mass concentration,size distributions,chemical compositions and the relations to meteorological factors were conducted.Results show that the averaged number concentration of aerosol was 225.3 cm^-3 (337.8 cm^-3 in maximum),which was on the same levels of other metropolis in China.The intrusion of cold front and precipitation were the major mechanism for aerosol cleaning out and the fog occurrence had great influence on the general diurnal variations pattern of aerosol.The PM₁₀ accounts for 60% to 80% of TSP（Total Suspended Particles） in mass concentration.The elements of aerosol originating from anthropogenic source,such as S,Zn,As and Pb,were enriched in fine aerosol particles.更多还原