Monitoring optical properties of aerosols with cavity ring-down spectroscopy

被引：42

作者：

Li, Ling ^{[1
]}

Chen, Jianmin ^{[1
,3
]}

Chen, Hui ^{[1
]}

Yang, Xin ^{[1
,3
]}

Tang, Yong ^{[1
]}

Zhang, Renyi ^{[1
,2
]}

机构：

[1] Fudan Univ, Ctr Atmospher Chem Study, Dept Environm Sci & Engn, Shanghai 200433, Peoples R China

[2] Texas A&M Univ, Dept Atmospher Sci, College Stn, TX 77843 USA

[3] Fudan Univ, Inst Global Environm Change Res, Shanghai 200433, Peoples R China

来源：

JOURNAL OF AEROSOL SCIENCE | 2011年 / 42卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Aerosol optical properties; Aerosol extinction coefficient; Cavity ring-down spectroscopy; Single scattering albedo; LIGHT-ABSORPTION MEASUREMENTS; BLACK CARBON; ANTHROPOGENIC SULFATE; MIXING STATE; SOOT AEROSOL; IN-SITU; SPECTROMETER; CALIBRATION; EXTINCTION; SCATTERING;

D O I：

10.1016/j.jaerosci.2011.02.001

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

This article describes the design and performance of a cavity ring-down spectroscopic (CRDS) instrument for measuring extinction coefficients of laboratory and ambient atmospheric aerosols. Through averaging 1000 individual waveforms, a minimum detectable aerosol extinction coefficient of 6.1 x 10(-7) m(-1) is achieved. Tests with polystyrene spheres (PSS), we suggested this CRDS system could measure the extinction coefficient of aerosol with uncertainty < 3% under laboratory controlled experimental conditions. The visual range measured with CRDS agrees well with visibility observations from Shanghai Meteorological Bureau. Combined with the TSI integrating nephelometer and NOx analyzer, CRDS was used to monitor the optical properties of ambient aerosols in the heavy pollution episode. The uncertainty for using the CRDS and TSI nephelometer to measure single scattering albedo (SSA) in an ambient measurement is estimated to be < 12%. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：277 / 284

页数：8

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