Multi-wavelength measurements of aerosol optical absorption coefficients using a photoacoustic spectrometer

The atmospheric aerosol absorption capacity is a critical parameter determining its direct and indirect effects on cli- mate. Accurate measurement is highly desired for the study of the radiative budget of the Earth. A multi-wavelength （405 rim, 532 nm, 780 nm） aerosol absorption meter based on phot...

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Published inChinese physics B Vol. 23; no. 6; pp. 228 - 233
Main Author 刘强 黄宏华 王尧 王贵师 曹振松 刘锟 陈卫东 高晓明
Format Journal Article
LanguageEnglish
Published 01.06.2014
Subjects
32纳米
Absorption coefficient
Absorption cross sections
Acoustic absorption
Aerosols
Atmospherics
Measuring instruments
Meters
Spectrometers
光声光谱仪
光声光谱法
光学吸收系数
地球辐射收支
大气气溶胶
波长测量
环境气溶胶
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Summary:The atmospheric aerosol absorption capacity is a critical parameter determining its direct and indirect effects on cli- mate. Accurate measurement is highly desired for the study of the radiative budget of the Earth. A multi-wavelength （405 rim, 532 nm, 780 nm） aerosol absorption meter based on photoacoustic spectroscopy （PAS） invovling a single cylin- drical acoustic resonator is developed for measuring the aerosol optical absorption coefficients （OACs）. A sensitivity of 1.3 Mm-l （at 532 nm） is demonstrated. The aerosol absorption meter is successfully tested through measuring the OACs of atmospheric nigrosin and ambient aerosols in the suburbs of Hefei city. The absorption cross section and absorption Angstrom exponent （AAE） for ambient aerosol are determined for characterizing the component of the ambient aerosol.
Bibliography:The atmospheric aerosol absorption capacity is a critical parameter determining its direct and indirect effects on cli- mate. Accurate measurement is highly desired for the study of the radiative budget of the Earth. A multi-wavelength （405 rim, 532 nm, 780 nm） aerosol absorption meter based on photoacoustic spectroscopy （PAS） invovling a single cylin- drical acoustic resonator is developed for measuring the aerosol optical absorption coefficients （OACs）. A sensitivity of 1.3 Mm-l （at 532 nm） is demonstrated. The aerosol absorption meter is successfully tested through measuring the OACs of atmospheric nigrosin and ambient aerosols in the suburbs of Hefei city. The absorption cross section and absorption Angstrom exponent （AAE） for ambient aerosol are determined for characterizing the component of the ambient aerosol.
photoacoustic spectrometer, atmospheric aerosols, absorption coefficient, absorption Angstrom exponent
Liu Qiang, Huang Hong-Hua, Wang Yao, Wang Gui-Shi, Cao Zhen-Song, Liu Kun, Chen Wei-Dong, Gao Xiao-Ming （a） Department of Optics ＆ Optical Engineering, University of Science and Technology of China, Hefei 230026, China b ） Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Sciences, Hefei 230031, China c） Institute for Environmental Reference Materials, Ministry of Environmental Protection, Beijing 100029, China d）Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics ＆ Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China e ） Laboratoire de Physicochimie del＇A tmosphbre, Universit6 du Littoral C6te d＇Opale, 189A, A v , Maurice Schumann, 59140 Dunkerque, France
11-5639/O4
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/23/6/064205