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Ground hail shooting identification and early warning method based on dual linear polarization radar

A dual-linear polarization and radar technology, which is used in the reflection/re-radiation of radio waves, radio wave measurement systems, and the use of re-radiation, etc.

Pending Publication Date: 2022-01-14
南京气象科技创新研究院 +2
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Problems solved by technology

[0004] The invention provides a ground hail identification and early warning method based on a dual-linear polarization radar that can provide clear ground hail and provide information for forecasters to issue accurate early warnings. The problem

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  • Ground hail shooting identification and early warning method based on dual linear polarization radar
  • Ground hail shooting identification and early warning method based on dual linear polarization radar
  • Ground hail shooting identification and early warning method based on dual linear polarization radar

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Embodiment

[0021] Example: such as figure 1 As shown, a ground hail identification and early warning method based on dual-polarization radar, using dual-polarization radar observation data to establish training samples, wherein, when establishing training samples, dual-polarization radar observation multi-variable unified indicator hail observation Regional data; then use two-dimensional Gaussian distribution and one-dimensional normal distribution to fit statistical samples, and establish Z H -Z DR , LKDP and the model of cross-correlation coefficient CC, Use the existing phase state classification method to process the hail and non-hail data, obtain the phase state classification results, and check and correct the misclassification results; finally, according to the classification results, calculate the probability of hail and non-hail categories in the vertical height (corresponding temperature) Density distribution, including the following steps:

[0022] S1. Calculate the vertic...

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Abstract

The invention discloses a ground hail shooting identification and early warning method based on a dual linear polarization radar. The method comprises the steps of: building a training sample through the observation data of a dual linear polarization radar, fitting a statistical sample through two-dimensional Gaussian distribution and one-dimensional normal distribution, building a model of ZH-ZDR, LKDP and a cross correlation coefficient CC, calculating hail and non-hail probabilities on each radar observation distance library, interpolating sounding temperature to radar observation coordinate height, constraining hail identification by using temperature information and statistics of a probability density function of hail at vertical height, and determining corresponding severe convection three-dimensional structure information by calculating the vertical accumulated liquid water content, so as to judge whether hail exists at a corresponding position. Ground hail shooting can be clearly judged, and information is provided for a predictor to issue early warning in combination with an early warning preset condition.

Description

technical field [0001] The invention relates to the technical field of weather forecasting, in particular to a ground hail identification and early warning method based on a dual-linear polarization radar. Background technique [0002] Hailstorm is a convection that produces hail, which is seriously disastrous. The strong hail it causes threatens people's lives and affects agriculture, transportation, buildings and industrial production. Hail is a fast-growing process, and the duration of a hailstorm is generally several minutes. It is difficult to capture the evolution process of hailstorms with conventional observation data, but the Doppler weather radar network has the characteristics of high temporal and spatial resolution. Radar data provide an observation basis for hail research. Wang Yanfeng et al. (2019) used weather radar data to study a According to the echo characteristics of strong hail, it was found that the radar data of this process had obvious "V"-shaped gap...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/95
CPCG01S13/958Y02A90/10
Inventor 杨吉郑媛媛孙康远赵坤朱艺清慕瑞琪徐芬
Owner 南京气象科技创新研究院
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