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Classification method and classification system of precipitation types based on typhoon climate precipitation rate

A technology of precipitation type and classification method, applied in the field of precipitation type classification method and classification system based on typhoon climate precipitation rate, can solve problems such as inapplicability, and achieve the effect of lowering the threshold of precipitation rate

Active Publication Date: 2018-12-25
SHANGHAI TYPHOON INST CMA
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Problems solved by technology

[0006] In order to overcome the inapplicability of existing classification methods in typhoon precipitation type classification, the present invention proposes a precipitation type classification method based on typhoon climate precipitation rate. Necessary modifications and improvements in order to be applicable to the classification of convective and stratus types of typhoon precipitation

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  • Classification method and classification system of precipitation types based on typhoon climate precipitation rate
  • Classification method and classification system of precipitation types based on typhoon climate precipitation rate
  • Classification method and classification system of precipitation types based on typhoon climate precipitation rate

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Embodiment

[0068] Take the data of typhoon "Fitte" on October 6-8, 2013 as an example. Typhoon "Fite" landed in northern Fujian, but it brought heavy rain along the coast of Hangzhou Bay, causing serious floods. Among them, the accumulated precipitation in the Songjiang area in the western suburbs of Shanghai exceeded 100 millimeters, causing serious urban waterlogging and causing underground garages in many residential areas to be flooded. This precipitation was just collected by the OTT PARSIVEL raindrop spectrometer in Shanghai Pudong World Expo Station during the whole process, so the raindrop spectrum data of typhoon "Fite" will be used to test the precipitation type classification method based on the typhoon climate precipitation rate of the present invention.

[0069] figure 1 a represents the precipitation at 1-minute intervals calculated from the raindrop spectrum. figure 1Convective, stratiform and mixed cloud precipitation samples are represented by gray, dark and light poin...

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Abstract

A method for classifying precipitation types based on the climate precipitation rate of typhoon includes detecting the descending water type at a time, obtaining a plurality of continuous samples Ri-N-Ri+n of precipitation rate at the time and in time intervals before and after the time; according to the precipitation types, the climate and the precipitation history records, the lower threshold, the difference threshold and the upper threshold of precipitation being set; according to the lower threshold, the difference threshold and the upper threshold, it is judged that the precipitation is stratus precipitation, convective precipitation or mixed precipitation. The invention fully takes into account that the raindrop spectrum characteristics of the precipitation caused by the difference in the formation mechanism between the precipitation in the rain belt of the Taiwan and the precipitation in other weather systems are different, and the raindrop spectrum characteristics are embodiedin the observation of the raindrop spectrum instrument on the ground.

Description

technical field [0001] The invention relates to precipitation measurement and analysis technology, in particular to a precipitation type classification method and a classification system based on typhoon climate precipitation rate. Background technique [0002] Rainfall in typhoon rain belts also includes two types of precipitation: stratiform precipitation and convective precipitation. Among them, stratiform precipitation is produced in the upper atmosphere, from the altostratus formed by the tiny solid particles (small ice crystals) formed by the strong upward movement of the typhoon eyewall area in the upper atmosphere and spreading outward, so this type of stratiform precipitation The precipitation rate is relatively low; while the convective precipitation is mainly caused by the typhoon convective rain belt passing over the raindrop spectrum collection instrument. This kind of convective precipitation has a short residence time when the rain belt passes through the rain...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/26
CPCG06Q10/0639G06Q50/26
Inventor 鲍旭炜吴立广林立旻
Owner SHANGHAI TYPHOON INST CMA
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