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Method for converting the assimilated cloud-to-ground lightning of severe convection weather forecasting into proxy radar echoes

A technology of weather forecasting and radar echo, which is applied in the field of communication, can solve the problems of the application limitation of four-dimensional variational data assimilation, the huge amount of calculation of the objective function gradient, etc., and achieve the effect of improving nowcasting

Active Publication Date: 2017-08-11
LANZHOU UNIVERSITY
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  • Claims
  • Application Information

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Problems solved by technology

Although the currently applied four-dimensional variational data assimilation solves the time window and mode constraints in three-dimensional variation to a certain extent, the calculation of the gradient of the objective function requires a huge amount of calculation, which makes the four-dimensional variational data assimilation in Business applications are very limited

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  • Method for converting the assimilated cloud-to-ground lightning of severe convection weather forecasting into proxy radar echoes
  • Method for converting the assimilated cloud-to-ground lightning of severe convection weather forecasting into proxy radar echoes
  • Method for converting the assimilated cloud-to-ground lightning of severe convection weather forecasting into proxy radar echoes

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Embodiment Construction

[0032] The method for assimilating ground-to-ground lightning conversion proxy radar echo for strong convective weather forecasting of the present invention will be further described below in conjunction with specific implementations:

[0033] See attached figure 1 As shown, the embodiment of the present invention provides a method for assimilating ground-to-ground lightning conversion proxy radar echo for strong convective weather forecast, including the following steps:

[0034] Step S1: Obtaining the CG lightning data;

[0035] Step S2: Process the CG lightning data and perform quality control on it;

[0036] Step S3: Convert the CG lightning data into a three-dimensional proxy echo;

[0037] Step S4: Assimilate the proxy echo into the three-dimensional variational system to realize the assimilation of the CG lightning data.

[0038] In this embodiment, the step of obtaining ground lightning data in step S1 is:

[0039] Step S11: Choose to set the assimilation time when the streaming s...

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Abstract

The invention relates to a method for converting the assimilated cloud-to-ground lightning of severe convection weather forecasting into proxy radar echoes. The method comprises: S1) obtaining the cloud-to-ground lightning data; S2) processing the cloud-to-ground lightning data and administering quality control thereto; S3) converting the cloud-to-ground lightning data into three-dimensional proxy echoes; and S4) substituting the proxy echoes to an assimilated three-dimensional variation system to realize the assimilation of the cloud-to-ground lightning data. The step 1 of obtaining the cloud-to-ground lightning data further comprises S11) selecting the time when the convection system starts to set the assimilation time; and S12) extracting the cloud-to-ground lightning data in the assimilation time period. According to the method for converting the assimilated cloud-to-ground lightning of severe convection weather forecasting into proxy radar echoes, the cloud-to-ground lightning data can be assimilated into a three-dimensional variation system, which increases the approaching forecasting for a severe convection system and makes the method applied to the currently available three-dimensional variation service system.

Description

Technical field [0001] The present invention belongs to the field of communication, and specifically relates to a method for assimilating ground-to-ground lightning conversion proxy radar echo for strong convective weather forecasting. Background technique [0002] In small and medium-scale numerical forecasting, meteorologists use data assimilation methods to fuse analysis data and observation data to provide an initial field for the model. Due to the limitation of calculation methods, the early assimilated observation data are generally conventional observations, such as wind, temperature, Pressure, wet, etc. However, a large number of studies have shown that due to the single observational data, the small and medium-scale information contained in the initial field obtained by reanalysis data and conventional observation simulation is often very limited. As the means of atmospheric sounding have become more abundant, many unconventional observational data have emerged, such as...

Claims

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Application Information

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IPC IPC(8): G01W1/02G01S13/95
CPCG01S13/95G01W1/02Y02A90/10
Inventor 杨毅韩文宇王莹
Owner LANZHOU UNIVERSITY
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