Improved method for making tropical cyclone wind zone

A tropical cyclone and wind belt technology, which is used in the evaluation of the overall intensity of tropical cyclones and the evaluation of the impact range

Inactive Publication Date: 2011-07-27
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For interpolation, the above-mentioned patent locates the interpolated wind circle based on the assumption that the geometric center of the wind circle of the tropical cyclone coincides with the path point. After spot checks, for wind circles of different scales, the geometric center of the wind circle and the path point Points may vary from hundreds of meters to hundreds of kilometers. Therefore, when pursuing higher interpolation accuracy of the wind circle, the above assumptions obviously cannot meet the requirements, and a more accurate positioning method is required to locate the interpolated wind circle

Method used

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  • Improved method for making tropical cyclone wind zone
  • Improved method for making tropical cyclone wind zone
  • Improved method for making tropical cyclone wind zone

Examples

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no. 1 example

[0059] figure 1 It shows a flow chart of a method for creating a tropical cyclone wind belt by only using the graphic center of gravity to locate and interpolate the wind circle according to the first embodiment of the present invention. The method for making tropical cyclone wind belt of the present invention comprises the following steps:

[0060] Step 101: Obtain the data of the time, wind level and geographical location of the wind circle boundary of each wind circle in a plurality of known wind circles in a tropical cyclone event.

[0061] The data on gale of tropical cyclone events in different historical periods are recorded in different data forms. For the gale area evolution map of tropical cyclone events recorded in paper form, it is first necessary to digitize the evolution map to extract the required data for making tropical cyclone wind belts. Various data about the tropical cyclone gale wind circle recorded in digital form, including observation time, wind lev...

no. 2 example

[0105] figure 2 A flowchart showing a method for creating a tropical cyclone wind belt according to the second embodiment of the present invention by combining the barycenter of the fitted wind circle graph and the center path to locate and interpolate the wind circle.

[0106] different from figure 1 As shown in step 103 of using the center of gravity of the graphic to locate the interpolated wind circle, the second embodiment combines the center of gravity of the graphic with the central path pair in the evolution diagram of the gale area in step 203 figure 1 The interpolated wind circle obtained in step 103 is used for positioning.

[0107] Step 203: Interpolate the fitted wind circles of the same wind force level according to the determined time interval, and use the graphic center of gravity of the fitted wind circles combined with the center path information to locate the interpolated wind circles to obtain multiple time-intensive interpolated wind circles.

[0108]...

example 1

[0127] Example 1 of the present invention is by means of Figure 8 , Figure 9 and Figure 10 The diagram illustrates the Figure 7 Each wind circle shown in carries out ellipse fitting, adopts the method as described in embodiment 1, obtains Figure 6 Wind bands of the indicated tropical cyclone event. Figure 8 shows the right Figure 7 The ellipse fitting schematic diagram of No. 17 wind circle in , the fitting similarity rate between the fitted ellipse wind circle and the original wind circle is 89.65%. Figure 9 show right Figure 7 Fitting and interpolation with the accuracy of 2 hours for the 6-level wind circle in , and use the center of gravity of the interpolated wind circle to locate the fitted wind circle and the interpolated wind circle. Figure 10 shown with Figure 9 The wind circle of level 8 and level 10 are respectively processed in the same manner as shown, and finally a schematic diagram of the wind belt of the tropical cyclone event is obtained.

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Abstract

The invention relates to an improved method for making a tropical cyclone wind zone. The method comprises the following steps: acquiring the data of time, wind scale and solar halo boundary geographic position of each solar halo of a plurality of known solar halos in a tropical cyclone event; forming a fitting ellipse solar halo or fitting Fourier solar halo by performing the ellipse fitting or Fourier fitting on the boundary of each known solar halo; based on a defined time interval, performing interpolation on the fitting ellipse solar halo or fitting Fourier solar halo at the same wind scale, thereby acquiring a plurality of interpolation solar halos about time density; forming a union set of a plurality of fitting ellipse solar halos at the same wind scale and a plurality of interpolation solar halos thereof, or forming a union set of a plurality of fitting Fourier solar halos at the same wind scale and a plurality of interpolation solar halos thereof, thereby acquiring a tropical cyclone wind zone at the wind scale; and forming the tropical cyclone wind zone of the tropical cyclone event by overlaying the wind zones at various wind scales.

Description

technical field [0001] The invention relates to the evaluation of the overall intensity of the tropical cyclone and the evaluation of the range of influence. More specifically, it relates to an improved method for making tropical cyclone wind belts. Background technique [0002] The tropical cyclone circle refers to the area surrounded by the tropical cyclone wind contour at a certain moment and is greater than or equal to a certain wind level. The tropical cyclone circle is one of the important parameters to evaluate the influence range of the tropical cyclone. At present, there are various sources of information on the influence range of tropical cyclones in the Northwest Pacific Ocean. Before the widespread application of satellite remote sensing, the influence range of tropical cyclones mainly refers to ground data, sounding aircraft and sounding balloon records, etc. In recent decades, satellite remote sensing and numerical models have been used more and more to determ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G15/00
Inventor 方伟华李颖
Owner BEIJING NORMAL UNIVERSITY
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