Advances in Meso-Scale Dynamical Analysis of Torrential Rain Systems in Recent Years in China

The main study results on torrential rain and mesoscale dynamical analysis in recent years are summarized,which include large scale circulation,the interaction between the large scale and meso-micro scale systems,upper and low level jet,vortex,potential vorticity and convective vorticity vector,helicity and instability,etc.The review on meso-scale dynamical analysis of torrential rain systems manifests that the numerical simulation,transform and budget of energy,vorticity,divergence,vorticity budget,vorticity advection,temperature advection,various instability indexes,etc.,are still the general variables for diagnosing the meso-scale systems.But in recent years,besides the potential vorticity and the helicity are used more effectively than before,some new variables,such as generalized moist potential vorticity in non-uniformly saturated atmosphere,convective vorticity vector,and wind partitioning method in a limited region,are applied more to the meso-scale dynamical analysis of torrential rain systems.