Analysis on the differences of key environmental fields of different types of rainstorm in Yongzhou area
Based on the NCEP fnl reanalysis data,the key physical quantities of the environmental field of all rainstorm processes in Yongzhou area from 2000 to 2020 were extracted.On the basis of obtaining physical quantities,the environmental field differences of different types of rainstorm processes are compared,and the key forecast factors are put forward.The results show that the relevant physical quantities in the rainstorm process are basically larger before and during the occurrence,and weaken after the occurrence.The mean values of the physical quantities of the tropical low-value system type rainstorm are signifcantly different from those of the vortex cold trough type and the warm inverted trough frontogenesis type rainstorm,while the mean values of the physical quantities of the warm inverted trough frontogenesis type rainstorm are generally lower than those of other types.The distribution of various physical quantities is more concentrated in the low vortex cold trough type,and the distribution of warm inverted trough frontogenesis type and tropical low value system is relatively discrete.For different types of weather conditions,there are obvious differences in the divergence,specific humidity and divergence threshold of low-level water vapor flux.
万方数据
维普
