Abstract: The geopotential tendency form of semigeostrophic theory is derived and compared with the potential vorticity form. The tendency form is compact and particularly convenient for non-Boussinesq, nonuniform potential vorticity flows.

Abstract: Lilly's model of a horizontally homogeneous cloud-topped mixed layer is studied. The model is closed by taking a weighted (weighting factor or entrainment parameter k) average of Lilly's maximum and minimum entrainment ...

Abstract: This paper presents the combined isentropic and spherical geostrophic coordinate version of semigeostrophic theory. This is accomplished by first proposing a spherical coordinate generalization of the geostrophic momentum ...

Abstract: A potential pseudodensity principle is derived for the quasi-static primitive equations on the sphere. An important step in the derivation of this principle is the introduction of ?vorticity coordinates??that is, new ...

Abstract: Equilibrium states of initially barotropically unstable polar vortices are predicted using two different approaches: minimum enstrophy and maximum entropy theories, which have been extended to include flows evolving on the ...

Abstract: We develop here the isentropic?geostrophic coordinate version of semigeostrophic theory on a midlatitude ?-plane. This approach results in a simple mathematical form in which the horizontal ageostrophic velocities are ...

Abstract: Some statistical measures of growth of American Meteorological Society technical journals have been compiled. A general upward trend in total number of articles, pages, and an increase (nearly doubling during the past 20 ...