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Forecasting method and forecasting system for dust-haze and sand-dust weather

A haze and dust technology, applied in the field of haze and dust weather forecasting methods and systems, can solve the problem that the observation network density cannot meet the forecast requirements, restrict the accuracy of haze and sand dust weather forecast, and prevent haze and dust weather Sand and dust weather prevention and response

Active Publication Date: 2020-04-10
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In addition, the existing methods generally rely on the observation data of meteorological or environmental protection stations. Due to economic underdevelopment or unsuitable natural and geographical conditions in a large number of areas, the density of the observation network cannot meet the forecasting requirements.
The lack of observational data has greatly restricted the accuracy of haze and dust weather forecasts, resulting in the inability to effectively prevent and respond to haze and dust weather

Method used

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  • Forecasting method and forecasting system for dust-haze and sand-dust weather
  • Forecasting method and forecasting system for dust-haze and sand-dust weather
  • Forecasting method and forecasting system for dust-haze and sand-dust weather

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Embodiment 1

[0075] Such as figure 1 Shown, the first embodiment of the method for forecasting haze and dust weather of the present invention, this method comprises: Meteorological forecasting method and neural network forecasting method;

[0076] Among them, weather forecasting methods include:

[0077] 101. Set a start date and an end date. Specifically, use the Bash shell script to set the start date of the forecast. By default, the computer system time is automatically obtained, or it can be set manually. The start date is assigned as DATE_START, and the year, month, and day corresponding to the time are assigned values To YY_S, MM_S, DD_S.

[0078] According to the start date of the forecast, the Bash shell script automatically sets the date three days later as the end date of the forecast. The end date can also be set manually, and the end date is assigned as DATE_END, which is the same as the assignment of the start date. , month, and day are assigned to YY_E, MM_E, and MM_E resp...

Embodiment 2

[0130] Such as Figure 4 Shown, the first implementation of the forecast system of haze and dust weather of the present invention, this system comprises:

[0131] The data downloading module is used to download meteorological data and discharge data in the first predetermined period, wherein, the first predetermined period is the time difference between the end date and the initial date; in the present embodiment, the data download tool is wget in the Bash shell script The tool, in which the meteorological data is the global weather forecast reanalysis data with a geographical resolution of 0.25°×0.25° provided by the Global Forecast System (GFS) of the National Environmental Forecasting Center of the United States; the emission data is the emission data for global atmospheric research. The database (Emission Database for Global Atmospheric Research, EDGAR) provides reanalysis data of atmospheric pollutant emissions on a global scale with a geographic resolution of 0.1°×0.1°. ...

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Abstract

The invention discloses a forecasting method and a forecasting system for dust-haze and sand-dust weather. The forecasting method comprises the steps of: forecasting the concentration of particles based on a chemical transmission mode (the main process comprises the steps of: converting a total emission amount in downloaded emission data into a unit emission amount, and carrying out fusion on downloaded meteorological data and ground surface parameters to obtain a meteorological driving field; and solving a meteorological field and particulate matter concentration within first preset time based on the unit emission amount and the meteorological driving field); comparing related data obtained from output meteorological data with a dust-haze and sand-dust forecast table to obtain preliminarydistinguishing of dust-haze and strong sand-dust weather; acquiring a data set composed of 24-hour variable temperature delta T and a coarse and fine particle concentration ratio eta of a to-be-measured place within second preset time when dust-haze and sand-dust weather occurs, taking the data set as training samples and training the data set to obtain a forecasting model, wherein the delta T and eta form the data set; and extracting delta T measurement and eta measurement from meteorological data output in a chemical transmission mode and inputting them into the forecasting model, and finely distinguishing floating dust and dust haze which are difficult to distinguish.

Description

technical field [0001] The invention relates to the technical field of meteorology, in particular to a method and system for forecasting haze and dust weather. Background technique [0002] Haze is defined as a large number of extremely fine dry dust particles floating in the air evenly, making the air with horizontal visibility less than 10 kilometers generally turbid, making distant bright objects slightly yellow and red, and dark objects slightly blue color. Sand and dust weather includes three types of floating dust, blowing sand and sandstorm. The horizontal visibility is less than 10 kilometers, 1-10 kilometers and less than 1 kilometer respectively. The wind speed is generally small when it occurs. Haze and dust weather are both visual range obstruction weather phenomena that are closely related to atmospheric particles. Due to the phenomenon of meter scattering of particles in the atmosphere, visibility will decrease and the air will be turbid when haze and dust we...

Claims

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Application Information

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IPC IPC(8): G01W1/10G01N15/06
CPCG01N15/06G01W1/10
Inventor 李正强陈杰张莹魏瑗瑗
Owner INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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