China has made new progress in the detection technology of aerosol spectral characteristics

[ China Instrumentation Network Instrument Development ] Recently, the research team of Anguang Institute of Zhang Weijun has made new progress in the detection of aerosol spectral characteristics. The related research results are Three-wavelength cavity-enhanced albedometer for measuring wavelength-dependent optical properties and single-scattering. The albedo of aerosols was published on the Optics Express published by the Optical Society of America (OSA).

The spectral properties of aerosols are closely related to their chemical composition, size and mixing state, reflecting the type of aerosol and source characteristics. Limited by the measurement method, the existing aerosol optical measurement system is mostly a single-wavelength, single-parameter measurement system, and it is difficult to realize on-line simultaneous measurement of multiple optical parameters, and the aerosol spectral characteristic measurement system is more scarce.

Researchers Zhao Weixiong and Dr. Xu Xuezhe and others, in 2014, combined the broadband cavity enhanced absorption spectroscopy technology with integrating sphere technology for the first time, and developed the world's first cavity-enhanced albedo spectrometer to achieve the extinction and scattering of atmospheric aerosols. Absorption coefficients, as well as on-line in situ simultaneous measurements of single scattering albedo (Atmospheric Measurement Techniques, 7(8), 2551-2566, 2014). Recently, they extended the detection wavelength of the system to the ultraviolet-red band, and developed a wide-band cavity-enhanced albedo spectroscopy system to achieve spectral measurement of multiple optical parameters of aerosols (Optics Express, 26(25), 33484-33500, 2018), and has been used in the comprehensive observation of the atmosphere in the Beijing-Tianjin-Hebei, Yangtze River Delta and Pearl River Delta regions, showing good research and business application prospects, and has been highly recognized by domestic and foreign counterparts. The observations are published in the journal TOP of Geosciences: Atmospheric Chemistry and Physics, 16(10), 6421-6439, 2016; Atmospheric Chemistry and Physics, 18(23), 16829-16844, 2018.

The research work was funded by the National Natural Science Foundation of China, the Anhui Outstanding Youth Science Fund, and the Chinese Academy of Sciences Youth Innovation Promotion Association.

(Original title: Anguang's new progress in the detection of aerosol spectral properties)