摘要
In this paper,the continuity and thermodynamic equations including moisture forcings were derived.Using these two equations and the basic momentum equation of local Cartesian coordinates,the budget equation of generalized moist potential vorticity(GMPV) was derived.The GMPV equation is a good generalization of the Ertel potential vorticity(PV) and moist potential vorticity(MPV) equations.The GMPV equation is conserved under adiabatic,frictionless,barotropic,or saturated atmospheric conditions,and it is closely associated with the horizontal frontogenesis and stability of the real atmosphere.A real case study indicates that term diabatic heating could be a useful diagnostic tool for heavy rainfall events.
In this paper, the continuity and thermody- namic equations including moisture forcings were derived. Using these two equations and the basic momentum equation of local Cartesian coordinates, the budget equation of generalized moist potential vorticity （GMPV） was derived. The GMPV equation is a good generalization of the Ertel potential vorticity （PV） and moist potential vorticity （MPV） equations. The GMPV equation is conserved un- der adiabatic, frictionless, barotropic, or saturated atmos- pheric conditions, and it is closely associated with the horizontal frontogenesis and stability of the real atmos- phere. A real case study indicates that term diabatic heat- ing could be a useful diagnostic tool for heavy rainfall events.
基金
supported by the National Natural Science Foundation of China (Grant No. 41075032)
Chinese Special Scientific Research Project for Public Interest (Grant No. GYHY200906004)
the National Basic Research Program of China (Grant No. 2010CB951804)
