Mesocyclone Identification and Intensity Judgment Method
A cyclone and intensity technology, applied in the field of meteorological analysis, can solve problems such as complex processes, achieve the effect of fewer steps, improve efficiency, and simplify the process
Active Publication Date: 2017-06-06
中国气象局公共气象服务中心
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[0006] In order to solve the problem that the existing method for identifying a medium cyclone is complex, the present invention proposes a method for identifying a medium cyclone and judging its intensity to simplify the process of identifying a medium cyclone and improve the efficiency of identifying a medium cyclone. Determine the strength of the mesocyclone
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[0024] The technical scheme of the present invention will be introduced below in conjunction with the accompanying drawings.
[0025] The method for identifying and judging the intensity of a mesocyclone includes the following steps:
[0026] (1) Obtain the location information and radial wind data of the radar site.
[0027] The location information of the radar site is also the latitude and longitude information of the radar site. The radial wind data refers to the radial wind speed of each pixel on the radar radial wind speed map, which is measured by the radar.
[0028] Preferably, this step also includes performing bilinear interpolation or cubic interpolation processing on the acquired radial wind data, because the radial wind speed measured by the radar is layer by layer, and there is no radial wind speed for the space between the two layers. For wind data, radial wind data can be supplemented in the space between the two layers through bilinear interpolation or cubic...
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The invention belongs to the technical field of meteorological analysis. In order to solve the problem that the process of the existing meso-cyclone identifying method is complex, the invention provides a meso-cyclone identifying and strength judging method comprising the following steps: acquiring location information and radial wind data of a radar site; selecting sample points from a radar radial wind speed chart, solving the correlation coefficient between the radial wind speed of the selected sample points and the cos(theta) value of the selected sample points, and recording the correlation coefficient as a; selecting the minimum radial wind speed Vmin from the selected sample points, calculating |Vmin| / Vwind, and recording the result as b; selecting the maximum radial wind speed Vmax from the selected sample points, calculating Vmax / Vwind, and recording the result as c; calculating the meso-cyclone index E, wherein E=a*b*c; and traversing all the points on the radar radial wind speed chart according to the above steps. By adopting the method of the invention, the process of meso-cyclone identification is simplified, the efficiency of meso-cyclone identification is improved, and the strength of a mesocyclone can be judged.
Description
technical field [0001] The invention belongs to the technical field of meteorological analysis, and in particular relates to a method for identifying and judging the intensity of a medium cyclone. Background technique [0002] A cyclone is a large vortex in which the horizontal airflow in the atmosphere rotates counterclockwise in the northern (southern) hemisphere. Cyclones are approximately circular or elliptical in shape, and vary greatly in size. Some cyclones have a horizontal scale (diameter) of several kilometers, some have a horizontal scale of hundreds of kilometers, and some have a horizontal scale of three or four thousand kilometers. A mesocyclone is usually up to 10 kilometers in diameter and can generate as many as 60 cyclones. A typical mesocyclone is a (cumulonimbus) cloud with strong updraft and downdraft. This kind of cloud has a high vertical extension, such as a towering and steep mountain. . [0003] Mesocyclones often cause disastrous weather such as...
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IPC IPC(8): G01S7/41G01S13/95
CPCG01S7/412G01S13/95Y02A90/10
Inventor 刘年庆孙健何险峰高金兵胡俊楠张国平惠建忠
Owner 中国气象局公共气象服务中心