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Atmospheric aerosol greatly influences human health andthe natural environment, as well as the weather and climate system.Therefore, atmospheric aerosol has attracted significant attention fromsociety. Despite consistent research efforts, there are still uncertaintiesin understanding its effects due to poor knowledge about aerosol verticaltransport caused by the limited measurement capabilities of aerosol massvertical transport flux. In this paper, a new method for measuringatmospheric aerosol vertical transport flux is developed based on thesimilarity theory of surface layer, the theory of light propagation in aturbulent atmosphere, and the observations and studies of the atmosphericequivalent refractive index (AERI). The results show that aerosol mass fluxcan be linked to the real and imaginary parts of the atmospheric equivalentrefractive index structure parameter (AERISP) and the ratio of aerosol massconcentration to the imaginary part of the AERI. The real and imaginaryparts of the AERISP can be measured based on the light-propagation theory.The ratio of the aerosol mass concentration to the imaginary part of theAERI can be measured based on the measurements of aerosol mass concentrationand visibility. The observational results show that aerosol verticaltransport flux varies diurnally and is related to the aerosol spatialdistribution. The maximum aerosol flux during the experimental period inHefei City was 0.017 mg m−2 s−1, and the mean value was 0.004 mg m−2 s−1. The new method offers an effective way to study aerosolvertical transport in complex environments

A new method for estimating aerosol mass flux in the urban surface layer using LAS technology