Application of multi-source data fusion in identification of wind speed before and after typhoon landfall
Based on Pydda inversion algorithm,cubic interpolation method and typical correlation analysis method,the wind field data are fused from Doppler radial velocity inversion wind field,ERA5-Land reanalysis wind field and automatic station wind field,and the characteristics of the fused wind field before and after the landfall of the super Typhoon"Lekima"(1909)are analyzed.The results show that the fused wind field with unique advantage of each wind source overcomes the deficiency of the lack of observational data at high altitudes,which performs well both for the large wind speed areas in the low-level atmosphere and the north-dipping vertical structure of the super Typhoon"Lekima"(1909).The fusion wind field can provide some indications of the windy area on the ground at the next time step through analyzing the low-level wind field at current time step,and further predict approximate extent of heavy precipitation after combining the topography information which can be used to identify the impacting areas of wind and rain disasters.
multi-source datawind field inversionwind field fusiontyphoon wind fieldwind speed identification
万方数据
维普
