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Method and device for detecting supercooled water by utilizing millimeter wave cloud radar and application

A supercooled water and millimeter wave technology, applied in measurement devices, re-radiation, radio wave measurement systems, etc., can solve problems such as inability to detect supercooled water, and achieve the effect of high speed resolution and high spatial and temporal resolution.

Active Publication Date: 2022-02-01
CHENGDU UNIV OF INFORMATION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And in rainy weather, supercooled water in clouds cannot be detected

Method used

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  • Method and device for detecting supercooled water by utilizing millimeter wave cloud radar and application
  • Method and device for detecting supercooled water by utilizing millimeter wave cloud radar and application
  • Method and device for detecting supercooled water by utilizing millimeter wave cloud radar and application

Examples

Experimental program
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Effect test

Embodiment 1

[0200] Using the observation data obtained by the Ka-band millimeter-wave cloud radar and microwave radiometer installed in a certain place during the TIPEX-III test, combined with the sounding temperature data of the station, the stratification of a certain day at 22:45-01:00 Supercooled water in clouds is detected using the method of the present invention.

[0201] available:

[0202] as attached Figure 4 The spatio-temporal distribution results of radar parameters of cloud particles in convective clouds detected by millimeter-wave cloud radar are shown, where (a)-(d) are the reflectivity factors Z e , spectral width σ v , Atmospheric vertical velocity V air and the average particle falling velocity From this figure, it can be seen that: from the Z of the global spectrum e According to the echo, the stratocumulus cloud lasted for 2 hours and 15 minutes over the station, the cloud top was about 4.5km high, and the fluctuation was small, but the echo intensity gradient ...

Embodiment 2

[0205] Using the observation data obtained by the Ka-band millimeter-wave cloud radar and microwave radiometer installed in a certain place during the TIPEX-III test, combined with the sounding temperature data of the station, the cumulus congestus on a certain day from 15:45 to 17:30 The supercooled water in cumulus, cumulus and altocumulus is detected using the method of the present invention.

[0206] available:

[0207] as attached Figure 6 The spatio-temporal distribution results of radar parameters of cloud particles in convective clouds detected by millimeter-wave cloud radar are shown, where (a)-(d) are the reflectivity factors Z e , spectral width σ v , Atmospheric vertical velocity V air and the average particle falling velocity It can be seen that from the global spectrum Z e It can be seen that cumulus congestus appeared from 15:50 to 16:40 and lasted for nearly 50 minutes. The cloud layer developed relatively high, and the highest cloud top could exceed 7.5...

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Abstract

The invention discloses a method and a device for detecting supercooled water by using a millimeter wave cloud radar and an application. The method comprises the following steps: acquiring a millimeter wave cloud radar power spectrum of a detection area; extracting effective cloud and rain signals from the power spectrum, and acquiring radar parameters and power parameters corresponding to the effective cloud and rain signals; identifying and / or extracting supercooled water signals on the basis of spectrogram features of the power spectrum and the obtained radar parameters; and based on the radar parameters, the dynamic parameters and the supercooled water signals, acquiring micro-physical parameters of the supercooled water through inversion calculation. According to the invention, supercooled water detection can be carried out by using the millimeter wave cloud radar, automatic identification and quantitative inversion are carried out on supercooled water in the cloud, and fine supercooled water spatial distribution and key physical parameters are obtained.

Description

technical field [0001] The invention relates to the technical field of supercooled water detection methods. Background technique [0002] Supercooled water in clouds refers to cloud droplets or water droplets that remain liquid in an environment below 0°C. It is usually formed because the cloud layer is clean and lacks a freezing nucleus or the strong updraft prevents the droplets from freezing. For cold clouds, the existence of supercooled water will make its liquid water content much higher than that of pure ice clouds, which will have an important impact on cloud radiation effects, water vapor budget and precipitation processes. At the same time, supercooled water also has practical application value in fields such as artificial weather modification operations, numerical model parameterization scheme optimization, and early warning of aircraft icing hazards. Due to the small particle size of supercooled water in convective clouds, the distribution of time and space varie...

Claims

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Application Information

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IPC IPC(8): G01S13/95G01S7/41
CPCG01S13/95G01S13/958G01S7/418Y02A90/10
Inventor 郑佳锋任涛曾正茂陈德花
Owner CHENGDU UNIV OF INFORMATION TECH
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