Determining and forecasting methods and determining and forecasting systems for visibility change, caused by tropical cyclone, in coastal area

Abstract

The invention provides determining and forecasting methods and determining and forecasting systems for visibility change, caused by tropical cyclone, in a coastal area. The visibility change determining method comprises that historical data, which has influence on the visibility of the area to be measured, of path points of the tropical cyclone as well as historical data of the visibility of the area to be measured in corresponding time are collected; the historical data of the path points of the tropical cyclone is classified according to the strengths, and path point data of different types of tropical cyclones is obtained; a forecast range of the area to be measured is divided into intervals, one path point is reserved for the same tropical cyclone in an interval for each type of tropical cyclone; and the distance and direction of each reserved path point relative to the area to be measured are calculated, interpolation operation is carried out according to the reserved path point, the distance and direction relative to the area to be measured and the visibility, corresponding to the reserved path point, of the area to be measured, and position spatial distribution of the visibility change, caused by different types of tropical cyclones, of the area to be measured is obtained. The methods and systems can be used to solve the problem that forecast tends to be inaccurate due to the fact that qualitative analysis is used in the prior art mainly.

Description

technical field [0001] The invention belongs to the technical field of analysis and measurement control, and in particular relates to a method and system for determining visibility changes in coastal areas caused by tropical cyclones, and a forecast method and system. Background technique [0002] Tropical cyclone is one of the most destructive natural disasters. Its impact on human beings is not only the casualties and damage caused by strong wind and rain to people, crops, houses, ships, etc., but also the decrease in visibility caused by its peripheral subsidence airflow. Sometimes even lead to the appearance of haze. Years of research have shown that during the movement of a tropical cyclone, the peripheral downdraft will have a significant impact on the surrounding meteorological conditions, including visibility, relative humidity, stratification and wind field. In fact, daily weather monitoring and forecasting have found that tropical cyclones off the coast of the Sou...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method and system for determining visibility changes in coastal areas caused by tropical cyclones, and a forecast method and system, which are used to solve the problem that the visibility analysis of tropical cyclones on coastal areas in the prior art is mainly based on qualitative analysis, and the accuracy of the forecasting method is insufficient. The problem

Images