Spectral model precipitation algorithms

"In this note, we review the algorithms for computing convective and large scale moist adiabatic processes in the spectral model. The methods have been modified from those used prior to August 1982. The modifications are directed primarily toward providing a thermodynamically consistent treatment rather than toward producing empirically optimal predicted rainfall amounts. The latter goal doesn't seem tractable at the present stage of development of the global, spectral model. The paper describes the convective scale parameterization in section 2.0, the large scale parameterization in section 3.0 and concludes with a summary of recent tests of the method in section 4.0"--Introduction. Joseph P. Gerrity, Jr., Robert Hirano. "August 1982." "This is an unreviewed manuscript, primarily intended for informal exchange of information among NMC staff members." System requirements: Adobe Acrobat Reader. 1982 NWS (National Weather Service) NCEP (National Centers for Environmental Prediction) Library Public Domain 2285