中国物理B ›› 2014, Vol. 23 ›› Issue (6): 64205-064205.doi: 10.1088/1674-1056/23/6/064205

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

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

刘强a b, 黄宏华b, 王尧c, 王贵师b d, 曹振松b, 刘锟b d, 陈卫东e, 高晓明b d   

  1. 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'Atmosphére, Université du Littoral Côte d'Opale, 189A, Av, Maurice Schumann, 59140 Dunkerque, France
  • 收稿日期:2013-08-19 修回日期:2013-11-27 出版日期:2014-06-15 发布日期:2014-06-15
  • 基金资助:
    Project supported by the Open Research Fund of Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Sciences, and the National Natural Science Foundation of China (Grant Nos. 41175036 and 41205120).

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

Liu Qiang (刘强)a b, Huang Hong-Hua (黄宏华)b, Wang Yao (王尧)c, Wang Gui-Shi (王贵师)b d, Cao Zhen-Song (曹振松)b, Liu Kun (刘锟)b d, Chen Wei-Dong (陈卫东)e, Gao Xiao-Ming (高晓明)b d   

  1. 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'Atmosphére, Université du Littoral Côte d'Opale, 189A, Av, Maurice Schumann, 59140 Dunkerque, France
  • Received:2013-08-19 Revised:2013-11-27 Online:2014-06-15 Published:2014-06-15
  • Contact: Gao Xiao-Ming E-mail:xmgao@aiofm.ac.cn
  • Supported by:
    Project supported by the Open Research Fund of Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Sciences, and the National Natural Science Foundation of China (Grant Nos. 41175036 and 41205120).

摘要: The atmospheric aerosol absorption capacity is a critical parameter determining its direct and indirect effects on climate. Accurate measurement is highly desired for the study of the radiative budget of the Earth. A multi-wavelength (405 nm, 532 nm, 780 nm) aerosol absorption meter based on photoacoustic spectroscopy (PAS) invovling a single cylindrical acoustic resonator is developed for measuring the aerosol optical absorption coefficients (OACs). A sensitivity of 1.3 Mm-1 (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 Ångström exponent (AAE) for ambient aerosol are determined for characterizing the component of the ambient aerosol.

关键词: photoacoustic spectrometer, atmospheric aerosols, absorption coefficient, absorption Å, ngströ, m exponent

Abstract: The atmospheric aerosol absorption capacity is a critical parameter determining its direct and indirect effects on climate. Accurate measurement is highly desired for the study of the radiative budget of the Earth. A multi-wavelength (405 nm, 532 nm, 780 nm) aerosol absorption meter based on photoacoustic spectroscopy (PAS) invovling a single cylindrical acoustic resonator is developed for measuring the aerosol optical absorption coefficients (OACs). A sensitivity of 1.3 Mm-1 (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 Ångström exponent (AAE) for ambient aerosol are determined for characterizing the component of the ambient aerosol.

Key words: photoacoustic spectrometer, atmospheric aerosols, absorption coefficient, absorption Ångström exponent

中图分类号:  (Laser spectroscopy)

  • 42.62.Fi
42.68.Jg (Effects of aerosols?) 42.25.Bs (Wave propagation, transmission and absorption)