“干”气溶胶等效复折射率与其质量浓度指标的相关性研究  

Correlation Between Equivalent Complex Refraction Index of “Dry” Aerosol and Its Mass Concentration Index

作　　者：张智察 倪长健[1,2] 汤津赢 冯淼 杨寅山 Zhang Zhicha;Ni Changjian;Tang Jinying;Feng Miao;Yang Yinshan(College of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu, Sichuan 610225, China;Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu, Sichtcan 610225, China;Chengdu Academy of Environmental Sciences, Chengdu, Sichuan 610072, China)

机构地区：[1]成都信息工程大学大气科学学院,四川成都610225 [2]高原大气与环境四川省重点实验室,四川成都610225 [3]成都市环境保护科学研究院,四川成都610072

出　　处：《光学学报》2019年第5期9-16,共8页Acta Optica Sinica

基　　金：国家重点研发计划(2018YFC0214004);四川省科技厅重点研发项目(2018SZ0287)

摘　　要：基于成都市2017年9月至12月逐时的气溶胶散射系数和吸收系数观测数据以及该时段同时次GRIMM180环境颗粒物监测仪的监测资料,利用免疫进化算法求解550nm波长处“干”气溶胶等效复折射率的实部和虚部,探讨了其与主要气溶胶质量浓度指标的相关性。结果发现:“干”气溶胶等效复折射率实部和虚部分别为1.55±0.045和0.022±0.0075。针对“干”气溶胶等效复折射率实部的变化,最重要的质量浓度指标是粒径小于1μm的颗粒物分别与粒径小于10μm和2.5μm颗粒物的质量浓度之比,对应的决定系数分别为0.53和0.21。针对“干”气溶胶等效复折射率虚部的变化,最重要的质量浓度指标是黑碳分别与粒径小于10μm和2.5μm颗粒物的质量浓度之比,对应的决定系数分别为0.47和0.42。Based on the hourly observational data of the aerosol scattering coefficient and the aerosol absorption coefficient as well as the coincidental data monitored by the GRIMM180 environment particle monitor in Chengdu during the period from September to December in 2017, the real and imaginary parts of the equivalent complex refractive index of “dry” aerosol at 550 nm were calculated using an immune evolutionary algorithm;subsequently, the correlations between these quantities and the primary index of mass concentration were further investigated. The results denote that the real and imaginary parts of the equivalent complex refractive index of “dry” aerosol are 1.55±0.045 and 0.022±0.0075, respectively. With respect to the change in the real part of the equivalent complex refractive index of “dry” aerosol, the most important mass concentration indexes of particles are the respective mass concentration ratios between particles having diameters smaller than 1 μm and particles having diameters smaller than 10 μm and 2.5 μm, and the corresponding determining coefficients are 0.53 and 0.21, respectively. With respect to the change in the imaginary part of the equivalent complex refractive index of “dry” aerosol, the most important mass concentration indexes of particles are the respective mass concentration ratios between black carbon and particles having diameters smaller than 10 μm and 2.5 μm, and the corresponding determining coefficients are 0.47 and 0.42, respectively.

关 键 词：大气光学 “干”气溶胶 气溶胶等效复折射率 免疫进化算法 质量浓度指标 相关性 

分 类 号：P404[天文地球—大气科学及气象学] N93[自然科学总论]