Generation of generalized moist potential vorticity in a frictionless and moist adiabatic flow

Details Generation of generalized moist potential vorticity in a frictionless and moist adiabatic flow Generation of generalized moist potential vorticity in a frictionless and moist adiabatic flow

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3112113g&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 12, CiteID L12113

Physics

9

Atmospheric Composition And Structure: Cloud Physics And Chemistry, Atmospheric Composition And Structure: Pressure, Density, And Temperature, Atmospheric Composition And Structure: Constituent Sources And Sinks, Atmospheric Composition And Structure: Evolution Of The Atmosphere

Scientific paper

The discontinuity of the latent heat term could occur in the thermodynamic equation in the transition area between the unsaturated and saturated air where the latent heat is released associated with the condensation in the saturated air whereas the latent heat is not released in the unsaturated air. To fix the discontinuity, the condensation probability function ($\frac{q}{qs)k (q and qs are specific humidity and saturated specific humidity respectively, k = 9) is introduced into the thermodynamic framework with ($\frac{q}{qs)kqs. The generalized moist potential vorticity (GMPV) is thus defined and its tendency equation is derived. The analysis shows that in a frictionless and moist adiabatic flow, the GMPV can be generated in the unsaturated air only and its generation rate is determined by the environmental moisture and its gradient.

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