Horizontal visibility forecast method based on site measured data and model results

A technology of horizontal visibility and measured data, which is applied in character and pattern recognition, measuring devices, weather condition prediction, etc., and can solve problems that cannot meet the needs of refined and quantitative forecasting

Active Publication Date: 2018-06-29
OCEAN UNIV OF CHINA +1
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, these methods often qualitatively predict whether fog will appear in a certain city or region on a certain day, and cannot meet the requirements of refined quantitative forecasting.

Method used

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  • Horizontal visibility forecast method based on site measured data and model results
  • Horizontal visibility forecast method based on site measured data and model results
  • Horizontal visibility forecast method based on site measured data and model results

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Experimental program
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Effect test

Embodiment

[0081] Concrete steps of the present invention are as follows:

[0082] 1) Read the data of automatic weather stations (currently read the data of 17 automatic weather stations owned by Qingdao Meteorological Bureau, the data format is excel), the physical quantities observed by automatic weather stations include: visibility, temperature, relative humidity, dew point temperature, Air pressure, wind direction (comprising ten-point wind direction and two-point wind direction, the present invention uses ten-point wind direction), wind speed (comprising ten-point wind speed and two-point wind speed, the present invention uses ten-point wind speed), precipitation. The data at the hour of the automatic weather station is selected, and the present invention uses the observed values ​​at 24 hours of the hour every day to carry out the next steps.

[0083]2) Calculate based on the physical quantities such as temperature, relative humidity, and air pressure extracted in the previous ste...

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Abstract

The invention relates to a horizontal visibility forecast method based on site measured data and model results. The invention adopts the specific technical scheme that a horizontal visibility algorithm is established on the basis of the site measured data, and the horizontal visibility forecast is realized in combination with the model results; the data is hourly observed by utilizing an automaticweather station, an algorithm for calculating horizontal visibility (level) by basic meteorological factors such as temperature and relative humidity at each site is established through a neural network method, one-to-one correspondence is established through considering the geographic information of sites and pattern grid points, the site measured data and the model forecast data within a period of time are selected, and a model for correcting from each of the grid points to the corresponding measured site is obtained by calculation; when forecast is required, firstly the model forecast data within the time to-be-forecasted is corrected by using the correction model, then the visibility or the level of each of the grid points are obtained by calculation by using the visibility algorithm, and finally, regional visibility forecast results are obtained through interpolation. The horizontal visibility forecast method provided by the invention effectively utilizes observation data and the model data of the automatic weather station and can realize the horizontal visibility forecast with higher temporal and spatial resolution.

Description

technical field [0001] The invention belongs to a method for forecasting horizontal visibility. By using a neural network, a visibility algorithm is established from observation data of an automatic weather station, and applied to a model forecast result to finally obtain a forecast result about the horizontal visibility. Background technique [0002] Horizontal visibility is a meteorological element closely related to people's production and life. It represents the farthest horizontal distance at which a person with normal vision can recognize the target object from the background under the prevailing weather conditions. In the automatic weather station, the horizontal visibility is measured by the visibility meter, and the horizontal visibility is obtained according to the attenuation of the laser by the air. When the phenomenon of low visibility occurs, the traffic will often be paralyzed, such as the delay of the plane and the closure of the highway, which will obviousl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01W1/10G06K9/62
CPCG01W1/10G06F18/23
Inventor 徐志鹏衣立张苏平薛允传马艳赵文雪霍志丽刘敬武
Owner OCEAN UNIV OF CHINA
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