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Parametric prediction method of atmospheric visibility based on WRF-Chem

A technology of atmospheric visibility and prediction method, applied in the field of atmospheric environment model, which can solve the problems of poor calculation accuracy and low usability of atmospheric visibility

Inactive Publication Date: 2018-06-26
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +3
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Problems solved by technology

[0004] For models such as WRF-Chem, which are widely used in air quality model forecasting, the availability of existing parameterization schemes for calculating atmospheric visibility is not high, resulting in poor calculation accuracy of atmospheric visibility

Method used

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  • Parametric prediction method of atmospheric visibility based on WRF-Chem
  • Parametric prediction method of atmospheric visibility based on WRF-Chem
  • Parametric prediction method of atmospheric visibility based on WRF-Chem

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with embodiment. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0028] like figure 1 As shown, a parameterized prediction method of atmospheric visibility based on WRF-Chem includes the following steps: obtaining meteorological data and topographic data within the simulation time, setting the evaluation area and preprocessing the meteorological data and topographic data.

[0029] Choose a combination of different parameterization schemes that have a greater impact on the simulation, and select an appropriate parameterization scheme according to the simulation area.

[0030] The WRF-Chem version 3.7 is used. The grid settings for simulation research are as follows: the vertical direction is divided into 28 layers, and the model top is 100hPa; the horizontal direction is se...

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Abstract

The invention discloses a parametric prediction method of atmospheric visibility based on WRF-Chem. The method includes obtaining meteorological data and topographic data in a simulation time, and setting an evaluation area and preprocessing meteorological data and topographic data; selecting different parameterization scheme combinations having a great influence on the simulation, and selecting an appropriate parameterization scheme according to a simulation area; running WRF-Chem, using the WRF-Chem mode to simulate particle concentration, calculating an extinction coefficient of particles to 550 nm according to Mie theory, and considering the extinction of atmospheric molecules, and calculating the atmospheric visibility by using an improved atmospheric visibility parameterization scheme. Due to the correction of a K value in current domestic and international researches and the consideration of a particulate matter extinction coefficient and a gas molecule extinction coefficient for the atmospheric extinction coefficient, according to the method, more accurate atmospheric visibility can be obtained.

Description

technical field [0001] The invention belongs to the technical field of atmospheric environment models, and in particular relates to a parameterized prediction method of atmospheric visibility based on WRF-Chem. Background technique [0002] Atmospheric visibility represents the transparency of the atmosphere, which can reflect the cleanliness of the atmosphere near the surface, and is closely related to social life and transportation safety. Due to the short time series of existing atmospheric pollutant observations, the observation and analysis of atmospheric visibility is still the main way to understand the long-term climate change characteristics of the atmospheric environment. Atmospheric visibility forecasting methods mainly include statistical forecasting and numerical forecasting. Statistical forecasting generally analyzes the change law of atmospheric visibility when weather phenomena such as fog and haze occur, establishes the statistical relationship between mete...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01W1/10
CPCG01W1/10
Inventor 高嵩毕晓甜赵天良梁伟朱孟周张龙
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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