Development and application of the multi-wavelength cavity ring-down aerosol extinction spectrometer

作     者：Junling Li Weigang Wang Kun Li Wenyu Zhang Maofa Ge Chao Peng 

作者机构：State Key Laboratory for Structural Chemistry of Unstable and Stable SpeciesCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences University of Chinese Academy of Sciences Air Quality Research DivisionEnvironment and Climate Change Canada Center for Excellence in Urban Atmospheric Environment (CEUAE)Institute of Urban EnvironmentChinese Academy of Sciences 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2019年第31卷第2期

页      面：227-237页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China (No.41227805) the National Key Research and Development Program of China (No.2016YFC0202704) 

主　　题：MCRD-AES Optical property Refractive indices Wavelength dependence 

摘      要：To better characterize the optical properties of atmospheric aerosols, the multi-wavelength cavity ring-down aerosol extinction spectrometer(MCRD-AES) is developed and applied in this study. By using tunable light source and four parallel cavities, the MCRD-AES covers a wide and atmospherically relevant wavelength range from 360 to 663 nm. Four wavelengths(375 nm, 440 nm, 532 nm, and 620 nm) are particularly tested with ammonium sulfate and nigrosine. The refractive index values obtained from this study agree well with literature data. The stability and accuracy of the MCRD-AES are tested, and the minimum detectable extinction coefficient is 0.5 1/Mm. The high sensitivity, high precision, and wavelength changeable of MCRD-AES indicate its great application prospect in comprehensively quantifying the optical properties of atmospheric aerosols.