A laser radar-based aerosol-cloud droplet conversion stage identification method

Abstract

The application provides a laser radar-based aerosol-cloud droplet conversion stage identification method. The method provided by the application: obtaining echo signals of a main channel, a depolarization channel and a molecular channel; calculating particle scattering ratios and particle depolarization ratios according to the echo signals and an atmospheric molecule scattering model; counting samples of the particle scattering ratios and the particle depolarization ratios in an identification domain, determining a joint probability density distribution of the particle scattering ratios and the particle depolarization ratios based on a two-dimensional sample set, and generating a joint probability density scatter plot; setting a joint identification criterion according to microphysical process characteristics of each stage of aerosol-cloud droplet conversion, and identifying the aerosol-cloud droplet conversion stage according to the particle scattering ratios, the particle depolarization ratios and the joint identification criterion. The laser radar-based aerosol-cloud droplet conversion stage identification method provided by the application realizes dynamic and fine identification of a cloud formation stage.

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