重庆市区大气气溶胶粒子的时空分布和物理特性  

ATMOSPHERIC AEROSOL TIME-SPACE DISTRIBUTION AND ITS PHYSICAL CHARACTERISTICS AT CHONGQING CITY

作　　者：陈金荣[1] 周文贤[1] 

机构地区：[1]南京气象学院

出　　处：《气象科学》1992年第4期436-444,共9页Journal of the Meteorological Sciences

摘　　要：1990年12月13日—1991年1月4日,用LG—83型光电粒子计数器,在重庆市沙坪坝气象站进行大气气溶胶粒子的观测,结果表明大气气溶胶粒子的平均浓度为252.7个/厘米~3,最大浓度为452.9个/厘米~3,最小浓度为84.8个/厘米~3,均较北京等地浓度为大。 重庆大气气溶胶粒子可分成两部分,细粒子(粒径小于2微米)区间服从Deirmendjian谱分布,粗粒子(粒径大于等于2微米)区间则服从Junge谱分布。气溶胶粒子与相对湿度、雾、降水都有着明显的关系。无雾和降水时,根据气溶胶粒子浓度求出的气象视距和目测能见度相一致。During Dec. 13, 1990 to Jan.4,l991 the atmospheric aerosol particles were observed using photoelectric counter model LG-83 at shapingba meteorological station, chongqing. The observed results indicate that the average concentration of aerosol particles is 252.7 per cm3,maximum concentration 452.9 per cm3 and minimum concen tration 84.8 per cm3, that are more than aerosol concentration atiBeijing. The atmospheric aerosol may be dividedinto two groups, the fine particles (D<2μm) are in accord with Deirmendjian spectra distribution, and the coarse particles (D≥2μm) are in accord with junge spectra distribution. Ii is obvious that the aerosol particles have a connection with relative humidity, fog and precipi tation. Without fcg and precipitation, calculated meteorological visibility is consistent with visual observation.

关 键 词：气溶胶粒子 谱分布 细粒子 消光系数 重庆市区 日际 爱根核 近地面层 散射系数 散射效率 

分 类 号：P4[天文地球—大气科学及气象学]