Method Of Modeling And Exploring 3D Structure Of Typhoon Based On GIS

In the context of global climate change,extreme weather events occur frequently in China,and the losses are becoming increasingly serious.Among these natural disasters,typhoon disaster is one of the most frequent natural disasters with the highest frequency and the most serious loss.How to improve the typhoon forecasting and emergency management level,reduce the risk of typhoon disaster has become a major challenge for the comprehensive disaster reduction and disaster prevention in China.Typhoon structure and process visualization and analysis techniques can provide technical support for typhoon forecasting.However,typhoon is a huge and complex cyclone,which is characterized by multi sources,multi dimension,large amount of data and multi scales.It is challenging and important for modeling in different ground air environment.At present,most of the typhoon visualization use numerical simulation method,and these visualization technology can not meet the needs of typhoon forecasting,assessment and so on.The three-dimensional visualization and analysis of meteorological data has become a trend.In this study,the super-typhoon "Jangmi" and "Meranti" were simulated by the medium-scale atmospheric climate WRF model,and the variables of the typhoon,multi-dimension and multi-attribute were separated according to the isoparametric surface value.Then,we make the body data for the three-dimensional visualization of the typhoon.Based on the B/S platform,the platform of the typhoon volume is visualized,and the visualization of the multivariable complex meteorological data is realized.In order to realize the mixture rendering of multiple visualization results in one scene,the three-dimensional modeling of the typhoon is carried out by VAPOR meteorological visualization software,and the meteorological information is analyzed and judged.Based on these works,we choose the factors such as topography,subtropical high and vertical wind shear,which are closely related to the occurrence and development of typhoon,to study the correlation between typhoon and these factors,such as Qcloud,QIce and potential temperature.The internal structure,spatial distribution and evolution of typhoon are analyzed synthetically.The conclusions and methods in the study provide some reference value for the related business of typhoon forecasting,and these technical and methodological can be referenced for the application of typhoon disaster prevention and mitigation work.