Diagnostic Analysis of Generalized Moist Potential Vorticity and Forecast of Torrential Rain Region
广义湿位涡与暴雨落区预报的诊断分析

The authors discussed the possible application of generalized moist potential vorticity(GMPV) in non-uniformly saturated atmosphere and its tendency to location of torrential rain,which maybe provide a new thought for the operational application of the GMPV.The calculated results manifest that the GMPV is not a conservational variable,but it can reflects the non-uniformly saturated property in real atmosphere.Especially,the water vapor and its gradient effect can be manifested in the GMPV,which can indicate that the convergence mechanism of water vapor at lower levels and can reflect the characteristic and mechanism of high water vapor convergence when torrential rain occurs,and it would be used more widely to diagnose the structure and location of torrential rain systems in the future.