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| Intercomparison of Aerosol Extinction Measurement Based on Optical Cavity Spectroscopy |
| ZHANG Jia-luo1,DU Ying-ying1,4,CHEN Jun1,WANG Meng1,SU Ming-xu1,LI Ling2,CHENG Yi2,LOU Sheng-rong3 |
1. School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai 200093, China
2. Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China
3. State Environmental ProtectionKey Laboratory of the Cause and Prevention of Urban Air Pollution Complex, Shanghai Academy ofEnvironmental Science, Shanghai 200233, China
4. Shanghai Kede Environmental Testing Technology Consulting Service Co., Ltd., Shanghai 200235, China |
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Abstract To achieve the on-line measurement of the broad-band extinction coefficient of atmospheric aerosols, an incoherent broad-band cavity enhanced absorption spectroscopy (IBBCEAS) experimental instrument was established. Then, in order to evaluate the accuracy and stability of the system, a comparative measurement was carried out simultaneously with CAPS-ALB, a single wavelength Cavity Attenuation Phase Shift ALBedo monitor, in the Environmental Science Building of Fudan University. The comparison result show that the measured aerosol extinction coefficients at the wavelength of 532nm of above two instruments has a same trend with a correlation coefficient of 0.974, indicating the established IBBCEAS system has similar reliability and stability to the metrological certificated high-precision instrument. After calibrated with CAPS-ALB, the measurement accuracy of the IBBCEAS system was significantly improved, and the measurement differency between the two instruments was reduced from 7.08Mm-1 to 2.4Mm-1. And it was also found that the broad-band spectral measurement is of great significance for studying the wavelength dependency of aerosol extinction coefficient.
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Received: 09 April 2021
Published: 18 May 2022
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| Fund:Open Fund Project of State Key Laboratory of Loess and Quaternary Geology;National Key Research and Development Program of China;National Natural Science Foundation of China |
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2022, Vol. 43 
