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In severe polluted areas, objects tend to be redder because of the refraction of light by particulate pollutants through the atmosphere. In this study, a particle scattering model is established to simulate the scattering of pollutants based on assumptions. Then the actual data of lunar extinction is obtained by using an astronomical telescope to measure the RGB color differentiation at different altitude angles of the lunar surface in Shanghai caused by pollutants scattering. The results are combined with the particle scattering model calculation to obtain the estimated pollutant thickness in the atmosphere.

“The Reddish Moon”--The Evaluation of Urban Air Pollution by Lunar Extinction