Method of Improving the Accuracy of Thunderstorm Weather Warning and Forecast Based on Dual-polarization Radar Observation

Abstract

The invention belongs to the field of radar weather observation, and discloses a method for improving the accuracy of thunderstorm weather warning and forecast based on dual-polarization radar observation, using X-band dual-polarization weather radar parameters, and performing phase unfolding, filtering and attenuation correction on data On the basis of quality control, based on the fuzzy logic algorithm, the ambient temperature limit of sounding data is introduced to identify various water particles in thunderstorm cells; The evolution characteristics of the horizontal and vertical distribution of the formed particles are analyzed in detail; finally, the microphysical concept model of the evolution process of the thunderstorm cell is established based on this, and the structure and evolution characteristics of the thunderstorm cell are obtained. The invention helps to deepen the understanding of the particle distribution and microphysical process of the hydrometeor inside a typical thunderstorm cell, and can provide quantitative and direct technical support for early warning and forecasting of thunderstorm weather.

Description

technical field [0001] The invention belongs to the field of radar weather observation, and in particular relates to a method for improving the accuracy of thunderstorm early warning and forecast based on dual-polarization radar observation. Background technique [0002] Thunderstorms are often caused by local convective systems such as single thunderstorms, multi-cell storms and super thunderstorms, often accompanied by lightning, short-term heavy precipitation, hail and strong winds, which bring a lot of inconvenience to human production and life. It also often causes great losses to the economic development of the society. Among them, the thunderstorm cell is the basis of thunderstorm weather. For example, a multi-cell storm is a strong thunderstorm system composed of thunderstorm cells in different development stages arranged in a row, and the circulation system is consistent. The dual linear polarization weather radar can alternately (or simultaneously) transmit and re...

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Problems solved by technology

[0003] The problem existing in the existing technology is: due to the lack of sufficient and systematic comparative analysis, the existing technology still lacks an effective filtering method for thunderstorm cells to eliminate the backward differential propagation phase shift caused by non-Rayleigh scattering, which will cause radar observation quality. Not high; there is a lack of a perfect identification method for individual thunderstorm particles. It is mainly based on dual-linear polarization weather radar to classify and identify aquatic particles in thunderstorm clouds with strong signal attenuation in the heyday, and it does not focus on the entire development process of thunderstorms. The research on the evolution characteristics of aquatic matter particles, and the lack of detailed quantitative research, makes the microphysical process of thunderstorm cells not well understood, and the microphysical conceptual model of each stage of thunderstorm cells is not given, which directly affects the understanding of Early warning and forecast ability of disastrous thunderstorm weather

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