Hour resolution rainfall process identification method

Abstract

The invention discloses an hour resolution rainfall process identification method which comprises the following steps of 1, an identification method; and 2, an intensity quantitative calculation method, namely a calculation method based on the combined action of three indexes, namely rainfall intensity, duration and coverage, of rainfall process intensity, The provided hour resolution rainfall process identification method has the advantages that the starting and ending conditions of the station, large area and small area rainfall processes are defined; the method is suitable for the intensity quantitative calculation of the hourly resolution rainfall processes of the stations and the areas in China, the accuracy is high, the test and demonstration display results are consistent with the real conditions, the practicability is realized, and the pertinence and the service benefits of the meteorological services are improved; the method provided by the invention solves the difficult problem of identifying the rainfall process from the hour resolution, which accords with the reality and is suitable for China.

Description

technical field [0001] The invention belongs to the technical field of meteorological forecasting, and in particular relates to an hourly resolution precipitation process identification method. Background technique [0002] At present, the precipitation produced by the weather system is mainly procedural, and the precipitation forecast and service are also carried out according to the process. The precipitation has obvious regional differences and the temporal and spatial distribution of the process precipitation is uneven. The recognition of the beginning and the end and the evaluation of the strength are still mainly based on manual subjective recognition and judgment, which is highly subjective. [0003] Due to the high disaster-causing characteristics of heavy rainfall processes and heavy rain processes, scholars have done more research on the definition and evaluation methods of heavy rainfall processes and heavy rain processes. For example, Jiang Aijun (2005) took the ...

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Problems solved by technology

[0005] 1. Focusing on two aspects of heavy rainfall process and heavy rain process, without considering strong rainfall process, moderate precipitation process or weak precipitation process, it cannot meet the needs of precipitation process identification and evaluation in meteorological forecast services;

[0006] 2. Torrential rain or heavy rain is defined in accordance with the national standard GB / T 28592-2012 "Precipitation Grade" and occurs in eastern China. Therefore, scholars study mostly fixed areas or administrative regions in eastern China, which is completely inapplicable to western China. , and does not reflect regional differences and the temporal and spatial distribution characteristics of precipitation in China, and does not have universal applicability in China;

[0007] 3. The heavy precipitation process and rainstorm process studied by scholars are based on the daily scale. At present, there is no identification and quantitative evaluation of the precipitation process from the hourly scale. However, the demand for refined meteorological services requires precise assessment of the precipitation process;

[0008] 4. As a short-term heavy rainfall that is extremely prone to disasters, it is not considered in the evaluation method of the precipitation process, which affects the matching degree with the disaster situation

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