Method, device, storage medium and electronic equipment for identifying vortex in meteorological field

Abstract

The invention provides a method, device, storage medium and electronic equipment for identifying vortices in the field of meteorology, wherein the method includes: taking the grid points with positive relative vorticity in the source as the target grid points; determining the grid points surrounding the target grid points The first grid point and the second grid point determine the target area with the target grid point as the center, and divide the target area into multiple quadrants; the average wind direction at the first grid point, the second grid point, and the quadrants all satisfy the corresponding inverse In the case of clockwise rotation conditions, it is considered that there is a mesoscale counterclockwise circulation around the target grid point, and the target grid point is regarded as an effective grid point, and the vortex center is determined according to the relative vorticity of the effective grid point. Through the method, device, storage medium and electronic equipment for identifying the vortex provided by the embodiments of the present invention, it can ensure that there is a complete counterclockwise circulation around the effective grid point, and accurately identify the position of the vortex center; for the complex wind field shape Irregular vortices can also be identified accurately.

Description

technical field [0001] The invention relates to the technical field of vortex identification, in particular to a method, device, storage medium and electronic equipment for identifying vortexes in the meteorological field. Background technique [0002] Flood disasters caused by heavy rains are one of the major meteorological disasters in my country. Studies by domestic and foreign scholars have shown that mesoscale vortices are important weather systems that cause heavy rains. In view of the importance of mesoscale vortices, a large number of scholars have carried out identification and statistical research on mesoscale vortices. The widely used idea of ​​vortex identification is to select one or more physical quantities that can characterize vortices (air pressure field, flow field, vorticity field, geopotential height field, etc.), identified in specific regions and specific isobaric surfaces. For example, manually identify mesoscale convective vortices by using the close...

AI Technical Summary

Problems solved by technology

[0003] The inventors found that the existing methods have at least the following shortcomings: the traditional manual identification method consumes a lot of time and manpower, and cannot meet the research needs of a long period of time

The program identification method based on the geopotential height field will lead to a large number of false positives, because the center of the low value of the geopotential height is not a necessary condition for the mesoscale vortex, that is, a considerable number of mesoscale vortex systems do not contain mesoscale low pressure

The vortex center determined by the program automatic identification method based on the vorticity field and flow field often deviates from the actual vortex center, and the identification error of the irregular vortex is relatively large

Images