典型地区大气气溶胶谱分布和复折射率特征研究  

Research on the characteristics of aerosol size distribution and complex refractive index in typical areas of China

作　　者：耿蒙 李学彬 秦武斌 刘泽阳 鲁先洋 戴聪明 苗锡奎 翁宁泉 Geng Meng;Li Xuebin;Qin Wubin;Liu Zeyang;Lu Xianyang;Dai Congming;Miao Xikui;Weng Ningquan(Department of Environmental Science and Optoelectronic Technology,University of Science and Technology of China,Hefei 230022,China;Key Laboratory of Atmospheric Composition and Optical Radiation,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China;Key Laboratory of Electro-Optical Countermeasures Test&Evaluation Technology,Luoyang 471003,China)

机构地区：[1]中国科学技术大学环境科学与光电技术学院,安徽合肥230022 [2]中国科学院安徽光学精密机械研究所大气成分与光学重点实验室,安徽合肥230031 [3]光电对抗测试评估技术重点实验室,河南洛阳471003

出　　处：《红外与激光工程》2018年第3期182-188,共7页Infrared and Laser Engineering

基　　金：国家自然科学基金(41105021;41305019)

摘　　要：为了研究典型地区大气气溶胶的谱分布和复折射率的特性,综合运用了黑碳仪、能见度仪、积分浊度仪以及光学粒子计数器等仪器对大气气溶胶进行测量。根据球形粒子的Mie散射理论,利用各仪器测量的数据反演得到气溶胶复折射率,并分析了各个地区的粒子谱分布特征,消光系数和吸收系数随波长的变化关系。结果表明,新疆地区、天津地区、厦门地区及合肥地区的大气气溶胶折射率实部n_r都在1.5左右,虚部ni分别为0.01、0.017、0.008和0.016。新疆地区的数浓度谱分布可以用Junge分布来描述,天津地区、合肥地区和厦门地区数浓度谱分布可以用Junge分布和对数正态分布来共同描述。最后还对四地区气溶胶消光和吸收特性随波长的变化关系进行描述,这对于研究气溶胶气候效应具有一定的参考价值。In order to study the characteristics of aerosol size distribution and complex refractive index in typical areas of China,the atmospheric aerosol was measured by using various equipments like aethalometres,visibility meters,integrating nephelometers and optical particle counter(OPC).The effective complex refractive index based on Mie scattering theory was calculated.Then,the aerosol size distribution was retrieved from the observation,and the relation between extinction and absorption coefficient with respect to wavelength was also analyzed in these typical areas.It shows that the mean values of real of refractive index nr in these area are all around 1.5,while the imaginary parts ni are 0.01,0.017,0.016 and 0.008 in Xinjiang,Tianjin,Hefei and Xiamen,respectively.The number size distribution can be described by Junge size distribution in Xinjiang,while it can be described by both Junge size distribution and lognormal distribution in Tianjin,Hefei and Xiamen.The relation between extinction and absorption characteristics of aerosol and wavelength was described.The results are important for research on the climatic effects of aerosols.

关 键 词：大气气溶胶 MIE散射 粒子谱分布 折射率 

分 类 号：P427.1[天文地球—大气科学及气象学]