Research progress of correction algorithm and influence factors for aerosol absorption coefficient from aethalometer measurement
CAI Yuan-qing1,2, XU Xue-zhe2, ZHOU Jia-cheng2,3, LIU Qian-qian2,3, ZHAO Wei-xiong2, FANG Bo2, WANG Shuo2, ZHANG Wei-jun1,2,3
1. Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, China; 2. Anhui Institute of Optics and Fine Mechanics, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230031, China; 3. University of Science and Technology of China, Hefei 230026, China
Abstract:As one of the commonly used techniques for aerosol absorption coefficient measurement, Aethalometer is widely used to investigate aerosol light absorption properties in laboratory and field experiments. However, owing to the constraint of filter-based method, the accuracy of the absorption coefficient measurement is affected by the filter-loading effect, and by the multiple-scattering effects caused by the filter fibers and aerosol particles. The instrument methodology and the developed correction algorithms of Aethalometer were reviewed. The influence factors for absorption coefficient measurement were explored. The influence of mixing state of black carbon (BC) on Aethalometer measurement deviation (Cref') of absorption coefficient were analyzed. The relationship between Cref' and aerosol single scattering albedo (SSA), and the wavelength-dependent relationship of Cref' were discussed. Furthermore, some suggestions for the future research were proposed.
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