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The entraining moist boundary layerA unified theory of entrainment into the planetary boundary layer is presented. It is assumed that the rates of buoyant and shear production of turbulence kinetic energy can be determined in terms of the entrainment mass flux. An expression is derived from the conservation law for turbulence kinetic energy, which, with the introduction of an empirical parameter, can be used together with a second relation between turbulence kinetic energy and the turbulence velocity scale to obtain the mass entrainment flux. The theory provides descriptions of storage-limited entrainment, buoyancy-limited entrainment into a clear mixed layer, and shallowing. It has been incorporated into a simulation of Day 33 of the Wangara experiment using a simple mixed layer model.
Document ID
19790059404
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Randall, D. A.
(MIT Cambridge, Mass., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1978
Subject Category
Meteorology And Climatology
Meeting Information
Meeting: Symposium on Turbulence, Diffusion, and Air Pollution
Location: Reno, NV
Start Date: January 15, 1979
End Date: January 18, 1979
Accession Number
79A43417
Funding Number(s)
CONTRACT_GRANT: NGR-22-009-727
Distribution Limits
Public
Copyright
Other

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