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Objective weather typing method based on numerical statistics

A technology of numerical statistics and classification methods, applied in weather forecasting, calculation, meteorology, etc., can solve the problem of lack of timeliness, high objective weather classification methods, subjective classification methods, weak universality of classification results, and poor weather types. Analyse problems such as impossible

Inactive Publication Date: 2019-09-27
NANJING UNIV
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Problems solved by technology

However, the subjective classification method has disadvantages such as weak universality of classification results, strong subjectivity, and heavy workload. Analysis is almost impossible to complete
[0003] In view of the deficiencies of the prior art described above, at present, there is a lack of a time-sensitive objective weather classification method based on numerical statistics

Method used

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  • Objective weather typing method based on numerical statistics
  • Objective weather typing method based on numerical statistics
  • Objective weather typing method based on numerical statistics

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Embodiment 1

[0025] like figure 1 Shown, the objective weather typing method based on numerical statistics of the present invention, comprises the following steps:

[0026] (1) Download the long-term global meteorological reanalysis data, select the meteorological elements specific to the 850hPa altitude layer at specific times of the day as the judgment factor, and select the appropriate spatial range according to the classification area;

[0027] (2) Before using the computer to classify the weather, it is necessary to standardize the meteorological grid point data. The standardization process can effectively eliminate the difference in the horizontal pressure gradient in different seasons. The standardized calculation formula is where Z i is the normalized value of the ith grid point, X i is the original value of the ith grid point, is the mean value of the study area, and S is the standard deviation of the study area.

[0028] (3) Integrated monitoring of large-load airships, un...

Embodiment 2

[0033]Taking the meteorological grid data of the Beijing-Tianjin-Hebei region as an example, it focuses on the classification of the dominant weather types in the Beijing-Tianjin-Hebei region over the past three decades. Classified into five dominant circulation situations, combined with the new-generation mesoscale weather forecast model WRF to simulate the meteorological field in the desired area in the next week, and classified and analyzed the weather situation in the next 7 days to the dominant type through the calculation of deviation index and similarity index.

[0034] (1) Download the NCEP / NCAR global meteorological reanalysis data from 1980 to 2016. Because the near-surface meteorological field is significantly affected by the physical characteristics of the surface, it is easy to cause a small-scale circulation disturbance system, and the high-level meteorological field is weakly related to the surface meteorological factors. And the algorithm has poor discrimination...

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Abstract

The invention discloses an objective weather typing method based on numerical statistics. The objective weather typing method based on numerical statistics comprises the following steps of: (1) downloading long-time global weather re-analysis data, and selecting 850 hPa height layer specific weather elements specific to time every day as determining factors; (2) before the weather is subjected to parting by using a computer, performing standardized calculation of the meteorological grid point data; (3) integrating and monitoring physical and chemical parameters of a heavy-load airship, an unmanned aerial vehicle and an airborne atmosphere; (4) calculating and selecting typical weather types of representative days; (5) calculating standard deviation indexes of the typical weather types of representative days and a certain day, and classifying all the weather types into one typical weather type; and (6) repeating the objective weather classification step to classify the weather types of the next week. The objective weather typing method is high in universality, timeliness and objectivity, and objective typing of long-term weather types in the past and weather typing forecasting of a week in the future can be achieved rapidly and accurately.

Description

technical field [0001] The invention relates to the technical field of computer objective weather typing, in particular to an objective weather typing method based on numerical statistics. Background technique [0002] The weather classification method is mainly to summarize a large number of changing weather circulation types according to a certain method to summarize several dominant types with high frequency, so as to effectively analyze the characteristics of changes in atmospheric changes and meteorological elements and air pollution under specific weather types. At present, the weather classification method based on human subjective judgment is mainly used. The subjective weather classification method usually selects specific target meteorological parameters for different weather characteristics, and identifies the weather map through manual judgment. According to the change characteristics of the target parameters in the weather map sort. However, the subjective clas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01W1/10G06K9/62
CPCG01W1/10G06F18/24
Inventor 周德荣丁爱军张扬
Owner NANJING UNIV
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