A Hourly Resolution Precipitation Process Identification Method

Abstract

The invention discloses an hourly resolution precipitation process identification method, comprising the following steps: step 1, an identification method, and step 2, a quantitative calculation method of intensity, that is, based on the precipitation process intensity, the three indicators of precipitation intensity, duration and coverage work together The superior effect of the method of the present invention is that the identification method of the hourly resolution precipitation process is given, and the starting and ending conditions of the precipitation process of the station, large area and small area are defined, and the method of the present invention forms a suitable The quantitative calculation method of the hourly resolution precipitation process intensity for stations and regions in China has high accuracy, and the inspection and demonstration results show that the results are consistent with the actual situation, which is practical, and improves the pertinence and service benefits of meteorological services; the method of the present invention solves the problem. The problem of identifying the precipitation process from hourly resolution is consistent with the actual situation 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 generated by the weather system is mainly procedural, and the forecast and service of precipitation are also carried out according to the process. There are obvious regional differences in precipitation and the spatial and temporal distribution of precipitation in the process is not uniform. The identification of the beginning and the end and the strength evaluation are still mainly based on manual subjective identification and judgment, which is highly subjective. [0003] Due to the high hazard-causing characteristics of heavy rainfall processes and heavy rainfall processes, scholars have conducted many studies on the definition and evaluation methods of heavy precipitation processes and heavy rain processes. For example, J...

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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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