CN112529780A - Tangent equation-based method and system for identifying secondary high-western stretching ridge points - Google Patents
Tangent equation-based method and system for identifying secondary high-western stretching ridge points Download PDFInfo
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Abstract
The invention relates to the technical field of meteorological data processing, and discloses a tangent equation-based method and system for identifying a secondary high-west stretching ridge point, so as to improve the precision. The method comprises the following steps: connecting 588-potential ten meters into a line to form a high-pressure area of the subtropical zone; two most west grid points in the high-pressure area of the secondary heat belt are selected and meet two conditions: the high-voltage lattice points are located in the auxiliary high area, and the first lattice point adjacent to the west side of the high-voltage lattice points is located outside the auxiliary tropical high area; determining four adjacent boundary points A, B, C, D intersecting the ten-meter potential 588 line by linear interpolation in the west direction and the north-south direction of the line connecting grid points E, F; wherein B and C are the two most west boundary points; and connecting the boundary points A and B, and connecting the boundary points C and D, calculating the coordinates of an intersection point G between the boundary points AB and CD, determining the coordinates of the center points H of the boundary points B and C, and taking the intersection point of the GH connecting line and a 588-bit potential ten-meter line as the position of a western extension ridge point of the subtropical zone high-voltage area.
Description
Technical Field
The invention relates to the technical field of meteorological data processing, in particular to a method and a system for identifying a secondary high-western stretching ridge point based on a tangent equation.
Background
High pressure in the subtropical zone of the western pacific is a deep high pressure system located in the northwest pacific, and is generally most evident on 700 kpa and 500 kpa isobaric surface plots. The high pressure of the subtropical zone is a warm power system, and presents an oval shape, and the long axis is approximately parallel to the weft circle. The high pressure of the subtropical zone plays an important role in the transportation and balance of water vapor, heat, energy and angular momentum between a middle-latitude area, a high-latitude area and a low-latitude area, and is an important system for atmospheric circulation. The areas under the high-pressure control of the western pacific subtropical zone have strong sinking inverse temperature, so that low-layer water vapor is difficult to form clouds to cause rain, stable weather in clear sky is caused, and large-scale drought can occur after the time is long.
The secondary height definition is summarized, and the number of grid points surrounded by 588 meters on 500hPa generally represents the area where the secondary height is located. The west extension point of 588 position with a potential of ten meters is the west extension point of the high pressure of the subtropical zone, namely 588 is the longitude of the west end of the actual ten-meter line and is used for representing the position of the high pressure west extension point of the subtropical zone.
The secondary height is an important system for delivering water vapor to continents of China. The secondary high western extension point affects the distribution and strength of precipitation in China. The judgment of the auxiliary high-western stretching ridge point is of great significance to the actual work. However, manual reading and judgment are mostly adopted at present, and the method has high subjectivity.
Disclosure of Invention
The invention aims to disclose a method and a system for identifying a secondary high xishi extension ridge point based on a tangent equation so as to improve the precision.
In order to achieve the purpose, the invention discloses a method for identifying a secondary high-western stretching ridge point based on a tangent equation, which comprises the following steps:
step S1, collecting high-voltage data of the subtropical zone, connecting ten meters of 588 positions into a line, and enabling grid points larger than 588 positions by ten meters of 588 positions to be located in a wrapping range of the ten meters of 588 positions to form a high-voltage area of the subtropical zone;
step S2, selecting two most west grid points E, F in the high-pressure region of the secondary heat belt, and making the two screened grid points satisfy two conditions: the high-voltage lattice points are located in the auxiliary high area under the condition I, and the first lattice points adjacent to the west side of the high-voltage lattice points are located outside the auxiliary tropical high area under the condition II; if the screened grid point is just on a 588 potential ten-meter line, the point is a western extension ridge point of the high-voltage area of the subtropical zone;
step S3, determining four adjacent boundary points A, B, C, D intersecting with a ten-meter line of 588 potential by linear interpolation in the west direction and the south direction of a grid point E, F connecting line; wherein B and C are the two most west boundary points;
and step S4, connecting the boundary points A and B and the boundary points C and D, calculating the coordinate of an intersection point G between the AB and the CD, determining the coordinates of the center points H of the boundary points B and C, and taking the intersection point of the GH connecting line and a 588-bit potential ten-meter line as the position of the western extension ridge point of the subtropical zone high-voltage area.
In order to achieve the above object, the present invention further discloses a system for identifying a secondary high-west stretching ridge point based on a tangent equation, which includes a memory, a processor and a computer program stored in the memory and operable on the processor, wherein the processor implements the steps of the above method when executing the computer program.
Therefore, the invention has the following beneficial effects:
1. the method is simple and convenient in calculation process and good in universality, and the auxiliary high western extension point can be determined according to the 588 potential of ten meters.
2. The calculation result of the method can help to judge the auxiliary high western extension point manually, thereby avoiding the error of manual interpretation and saving manpower and material resources.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic flow chart of a method for identifying a secondary high xitu ridge point based on a tangent equation according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating the relative positions of grid points, boundary points, and a 588 potential ten-meter line according to an embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
Example 1
The embodiment discloses a method for identifying a secondary high-western stretch ridge point based on a tangent equation, as shown in fig. 1 and 2, comprising the following steps:
and S1, collecting high-voltage data of the subtropical zone, connecting ten meters of potential 588 into a line, and forming a subtropical zone when grid points larger than the ten meters of potential 588 are positioned in the wrapping range of the ten meters of potential 588.
Step S2, selecting two most west grid points E, F in the high-pressure region of the secondary heat belt, and making the two screened grid points satisfy two conditions: the high-voltage lattice points are arranged in the auxiliary high area under the condition I, and the first lattice points adjacent to the west side of the high-voltage lattice points are arranged outside the auxiliary tropical high area under the condition II. As a special example, if the screened grid point is just at 588 potential ten meters, the point is a western extension ridge point of the high-pressure area of the subtropical zone.
Step S3, determining four adjacent boundary points A, B, C, D intersecting with a ten-meter line of 588 potential by linear interpolation in the west direction and the south direction of a grid point E, F connecting line; where B and C are the two most west boundary points.
And step S4, connecting the boundary points A and B and the boundary points C and D, calculating the coordinate of an intersection point G between the AB and the CD, determining the coordinates of the center points H of the boundary points B and C, and taking the intersection point of the GH connecting line and a 588-bit potential ten-meter line as the position of the western extension ridge point of the subtropical zone high-voltage area. Corresponding to fig. 2, the west ridge point of the high-pressure zone of the subtropical zone is point Z.
Example 2
Corresponding to the above embodiments, the present embodiment discloses a system for identifying a secondary high-west stretching ridge point based on a tangent equation, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.
In summary, the method and system for identifying the secondary high-western stretching ridge point based on the tangent equation disclosed in the above embodiments of the present invention have the following beneficial effects:
1. the method is simple and convenient in calculation process and good in universality, and the auxiliary high western extension point can be determined according to the 588 potential of ten meters.
2. The calculation result of the method can help to judge the auxiliary high western extension point manually, thereby avoiding the error of manual interpretation and saving manpower and material resources.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A method for identifying a secondary high-western stretching ridge point based on a tangent equation is characterized by comprising the following steps:
step S1, collecting high-voltage data of the subtropical zone, connecting ten meters of 588 positions into a line, and enabling grid points larger than 588 positions by ten meters of 588 positions to be located in a wrapping range of the ten meters of 588 positions to form a high-voltage area of the subtropical zone;
step S2, selecting two most west grid points E, F in the high-pressure region of the secondary heat belt, and making the two screened grid points satisfy two conditions: the high-voltage lattice points are located in the auxiliary high area under the condition I, and the first lattice points adjacent to the west side of the high-voltage lattice points are located outside the auxiliary tropical high area under the condition II; if the screened grid point is just on a 588 potential ten-meter line, the point is a western extension ridge point of the high-voltage area of the subtropical zone;
step S3, determining four adjacent boundary points A, B, C, D intersecting with a ten-meter line of 588 potential by linear interpolation in the west direction and the south direction of a grid point E, F connecting line; wherein B and C are the two most west boundary points;
and step S4, connecting the boundary points A and B and the boundary points C and D, calculating the coordinate of an intersection point G between the AB and the CD, determining the coordinates of the center points H of the boundary points B and C, and taking the intersection point of the GH connecting line and a 588-bit potential ten-meter line as the position of the western extension ridge point of the subtropical zone high-voltage area.
2. A tangent equation based secondary high-west ridge point identification system comprising a memory, a processor and a computer program stored on said memory and executable on said processor, wherein said processor when executing said computer program implements the steps of the method of claim 1.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6515659B1 (en) * | 1998-05-27 | 2003-02-04 | In-Three, Inc. | Method and system for creating realistic smooth three-dimensional depth contours from two-dimensional images |
| CN107288096A (en) * | 2017-08-16 | 2017-10-24 | 国网湖南省电力公司 | Reservoir Restricted Water Level demarcation method and system based on secondary high intermediate-term movement |
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2020
- 2020-12-16 CN CN202011490462.8A patent/CN112529780B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6515659B1 (en) * | 1998-05-27 | 2003-02-04 | In-Three, Inc. | Method and system for creating realistic smooth three-dimensional depth contours from two-dimensional images |
| CN107288096A (en) * | 2017-08-16 | 2017-10-24 | 国网湖南省电力公司 | Reservoir Restricted Water Level demarcation method and system based on secondary high intermediate-term movement |
Non-Patent Citations (4)
| Title |
|---|
| 李婉等: "江淮地区33a持续性异常降水过程的天气学特征分析", 《成都信息工程大学学报》 * |
| 杨莉等: "柘溪水库防洪发电优化调度策略研究", 《人民长江》 * |
| 陈明萱: "海面温度对西北太平洋副热带高压的影响", 《海洋学报(中文版)》 * |
| 陈月娟等: "西太平洋副热带高压的强度和位置与亚洲地表温度之关系", 《大气科学》 * |
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