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Typical rainfall event selection method for numerical atmospheric model

A model and atmospheric technology, applied in meteorology, weather condition forecasting, measuring devices, etc., can solve problems such as blindness of numerical atmospheric models

Active Publication Date: 2016-09-21
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Description
  • Claims
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Problems solved by technology

To a certain extent, the setting of the numerical atmospheric model has great blindness

Method used

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  • Typical rainfall event selection method for numerical atmospheric model
  • Typical rainfall event selection method for numerical atmospheric model
  • Typical rainfall event selection method for numerical atmospheric model

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Embodiment Construction

[0040] Below in conjunction with embodiment, the present invention will be further described:

[0041] The technical scheme adopted in the present invention is a kind of typical rainfall event selection method for the numerical atmospheric model proposed based on the rainfall and the inhomogeneity of the temporal and spatial distribution of rainfall, and is implemented according to the following steps:

[0042] (1) Selection and setting of the numerical atmospheric model: select a numerical atmospheric model that is recognized both at home and abroad for rainfall simulation and forecasting, such as WRF, and determine the initial field, physical parameterization scheme, and resolution of the model. etc. to set.

[0043] (2) Classification of typical rainfall events based on secondary rainfall: From the historical rainfall events, 6 groups of secondary rainfall of different grades were selected for classification, as shown in Table 1.

[0044] Table 1 Rainfall grade table

[0...

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Abstract

The present invention relates to a typical rainfall event selection method for a numerical atmospheric model. The method comprises: a typical rainfall event classification method based on individual rainfall amount; a rainfall time inhomogeneity calculation method; a rainfall spatial inhomogeneity calculation method; and a typical rainfall event selection method based on a rainfall spatial-temporal inhomogeneity coefficient. In the invention, the standardized typical rainfall event selection method is provided for selection and adjustment of a numerical atmospheric model from the perspective of rainfall amount and spatial-temporal distribution, the rainfall type is quantitatively described, and the simulation accuracy of the numerical atmospheric model for different types of rainfall in a certain research area is measured, which can not only provide the basis for model setting in the research area, but also shows that the model is more suitable for which type of rainfall, provides the basis for model selection and provides reasonable numerical atmospheric model simulation plans with respect to different types of rainfall for relevant departments such as meteorology, water conservancy and the like. The typical rainfall event selection method of the invention can be widely applied.

Description

technical field [0001] The invention relates to the technical field of numerical rainfall forecasting, in particular to a method for selecting typical rainfall events for numerical atmospheric models Background technique [0002] The simulation and forecast of rainfall not only provide convenience for people's life, but also help people take measures to reduce or avoid possible losses caused by natural disasters caused by rainfall. Since the emergence of numerical atmospheric models, quantitative rainfall simulation and forecasting have become a reality, and the continuous development of computer technology has provided strong technical support for the update and improvement of numerical atmospheric models. However, since the formation process and occurrence of rainfall are affected by many aspects such as large-scale atmospheric circulation, ocean currents, sea and land positions, topography, underlying surface, and human activities, there are many uncertainties in the temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01W1/10
CPCG01W1/10
Inventor 刘佳李传哲田济扬严登华于福亮王洋聂汉江
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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