Method for detecting supercooled water clouds

Abstract

The invention discloses a method for detecting supercooled water clouds. The problem is solved that existing methods cannot be used for accurately identifying the distribution range of the supercooledwater clouds in an ice-water mixed cloud phase state. The method includes the steps of downloading historical cloud parameter data and setting up historical sample data for an area to be studied; distinguishing historical supercooled water cloud regions and historical non-supercooled water cloud regions according to images, carrying out statistics on the occurrence frequency of various cloud phase states of the historical cloud parameter data, and determining a cloud phase state criterion, a cloud top temperature criterion and a cloud droplet effective radius criterion; obtaining current cloud parameter data for the area to be studied and setting up current sample data; according to the cloud phase state criterion, distinguishing supercooled water cloud regions in the cloud phase states and non-supercooled water cloud regions in the cloud phase states; according to the cloud top temperature criterion, distinguishing the supercooled water cloud regions with cloud top temperatures; according to the cloud droplet effective radius criterion, distinguishing the supercooled water cloud regions. According to the method, the rapid and stable detection of the supercooled water clouds is achieved, the calculation efficiency is high, and the application range is wide.

Description

technical field [0001] The invention relates to the technical field of satellite remote sensing data cloud detection, in particular to a supercooled water cloud detection method. Background technique [0002] Liquid water droplets with a temperature lower than 0°C in the cloud form a supercooled water cloud, which is the main area where artificial ice nuclei such as dry ice and silver iodide are sown in artificial precipitation technology. The impact of the supercooled water droplets on the aircraft surface will also cause aircraft icing hazards. At present, the detection methods of supercooled water clouds mainly include: airborne particle measurement method, laser radar, millimeter wave radar method and cloud parameter threshold method. The airborne particle measurement method will be limited by the aircraft icing disaster and the space-time range; lidar and millimeter-wave radar have a large attenuation, which is easy to underestimate the supercooled water content in the ...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a supercooled water cloud detection method, which solves the problem that the existing method cannot accurately identify the distribution range of the supercooled water cloud under the ice-water mixed cloud phase state

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