光学学报, 2019, 39 (5): 0501002, 网络出版: 2019-05-10   

“干”气溶胶等效复折射率与其质量浓度指标的相关性研究 下载: 1360次

Correlation Between Equivalent Complex Refraction Index of “Dry” Aerosol and Its Mass Concentration Index
张智察 1,2,*倪长健 1,2,*汤津赢 1,2冯淼 3杨寅山 1,2
作者单位
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
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550 nm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1 μm的颗粒物分别与粒径小于10 μm和2.5 μm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10 μm和2.5 μm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。
Abstract
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.

张智察, 倪长健, 汤津赢, 冯淼, 杨寅山. “干”气溶胶等效复折射率与其质量浓度指标的相关性研究[J]. 光学学报, 2019, 39(5): 0501002. Zhicha Zhang, Changjian Ni, Jinying Tang, Miao Feng, Yinshan Yang. Correlation Between Equivalent Complex Refraction Index of “Dry” Aerosol and Its Mass Concentration Index[J]. Acta Optica Sinica, 2019, 39(5): 0501002.

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