This paper presents a new method about how to classify different types of aerosols by lidar measurements. Two lidar equations containing the optic parameters (backscatter coefficient, extinction coefficient ) about two different types of aerosols, background aerosol and cloud, were built. The solutions about the two lidar equations, optic parameters inversion, were given to classify the background aerosol and cloud. The lidar signals generated from backscatter of two different types of aerosols, with two different extinction to backscatter coefficient ratio ( Saer1, Saer2), were simulated, and the optic parameters inversion from the two simulated lidar signals were almost identical to the simulation parameters for different types of aerosols. Two types of aerosols, the background aerosol and cloud, were simultaneously measured by lidar, and were obviously discriminated by using this new method. The simulations and measurements results verified the new method for aerosols classifications.
This paper presents the Fog-Haze measurements by Raman-Rayleigh-Mie Lidar in North suburb of Nanjing,
the measurement results are analyzed and compared with the weather forecast. Continuous measurements are
carried out on 2009/12/2, it is clear day from 01:00 to 08:00 in the morning, and Fog-Haze is measured from
at 10:00 in the morning to 19:00 in the evening. The Fog-Haze measurement results coincide with the weather
forecast that very day. The Fog-Haze Lidar measurement results on 2009/12/2 are analyzed and compared
with the boundary aerosol measurement results on 2010/01/10, the differential characters of
range-corrected-signals between Fog-Haze and boundary aerosol are discussed. It is shown that Fog-Haze
usually occurs at about 300-400m height and boundary aerosol usually occurs at about 1000m height in
Nanjing.
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