Prediction method and prediction device of weather radar echo image

Abstract

The invention discloses a prediction method of a weather radar echo image. The method comprises the steps of: determining a speed vector image of the weather radar echo image of a first region at a first moment; using the weather radar echo image at the first moment as a reference weather radar echo image; using the current reference weather radar echo image and the speed vector image to carry out non-linear extrapolation, and determining the weather radar echo image at the target moment; under the condition that the current target moment is a second moment, determining that the weather radar echo image at the current target moment is a prediction result; and under the condition that the current target moment is not the second moment, determining the weather radar echo image at the current target moment is a new reference weather radar echo image, and repeating the step of using the current reference weather radar echo image and the speed vector image to carry out non-linear extrapolation. Based on the prediction method disclosed by the invention, the weather radar echo image is predicted more accurately, so that the accuracy of weather prediction is improved.

Description

technical field [0001] The invention belongs to the technical field of weather forecasting, in particular to a forecasting method and a forecasting device of weather radar echo images. Background technique [0002] In the field of meteorological forecasting, it is important to predict the precipitation in the future. At present, the echo images of weather radar are usually used to predict the amount of precipitation. For example: using the echo image of Doppler radar, according to the appropriate Z-R relationship (reflectivity factor and rain intensity relationship) to predict the future precipitation in a certain area. The existing precipitation prediction methods mainly include: the static method prediction based on the echo intensity of weather radar, and the linear extrapolation method prediction based on the echo intensity of weather radar. [0003] Based on the static method prediction of weather radar echo intensity, assuming that the cloud layer in a certain area w...

AI Technical Summary

Problems solved by technology

[0005] However, the movement of clouds is affected by many factors, especially storms (strong convective weather) usually move in the form of large-scale cyclones, rather than stationary or linear movement, so the accuracy of the two existing prediction methods low, especially for strong convective weather, it is difficult to accurately predict using the existing two methods

Images