MODEL OF THE THERMODYNAMIC STRUCTURE OF THE TRADE-WIND BOUNDARY LAYER - 1. THEORETICAL FORMULATION AND SENSITIVITY TESTS.

Bruce A Albrecht, Alan K. Betts, Wayne H. Schubert, Stephen K. Cox

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

A numerical model which predicts the time variation of the thermodynamic structure of the trade-wind boundary layer is developed. Horizontally homogeneous conditions are assumed and the large-scale divergence, sea surface temperature and surface wind speed are specified externally. The model predicts the average value of mixing ratio and moist static energy in the subcloud and cloud layer and the slopes of these quantities in the cloud layer; the model also predicts the height of the transition layer (the layer which defines the boundary between the cloud and subcloud layer) and the height of the trade inversion. Subcloud layer convective fluxes are specified by using the bulk aerodynamic method for specifying the surface fluxes and a mixed-layer parameterization of the fluxes at the top of the subcloud layer. The moist convective processes are parameterized in terms of a mass flux which varies linearly with height and a cloud-environment difference in thermodynamic quantities which also varies linearly with height. Radiative fluxes are parameterized in terms of a specified cloud cover and vertically averaged boundary-layer heating. Refs.

Original languageEnglish (US)
Pages (from-to)73-89
Number of pages17
JournalJournal of the Atmospheric Sciences
Volume36
Issue number1
StatePublished - Jan 1979
Externally publishedYes

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trade wind
Boundary layers
boundary layer
thermodynamics
Thermodynamics
Fluxes
Parameterization
Numerical models
Aerodynamics
Mass transfer
surface flux
test
surface wind
cloud cover
mixing ratio
Heating
aerodynamics
mixed layer
parameterization
sea surface temperature

ASJC Scopus subject areas

  • Engineering(all)

Cite this

MODEL OF THE THERMODYNAMIC STRUCTURE OF THE TRADE-WIND BOUNDARY LAYER - 1. THEORETICAL FORMULATION AND SENSITIVITY TESTS. / Albrecht, Bruce A; Betts, Alan K.; Schubert, Wayne H.; Cox, Stephen K.

In: Journal of the Atmospheric Sciences, Vol. 36, No. 1, 01.1979, p. 73-89.

Research output: Contribution to journalArticle

Albrecht, Bruce A ; Betts, Alan K. ; Schubert, Wayne H. ; Cox, Stephen K. / MODEL OF THE THERMODYNAMIC STRUCTURE OF THE TRADE-WIND BOUNDARY LAYER - 1. THEORETICAL FORMULATION AND SENSITIVITY TESTS. In: Journal of the Atmospheric Sciences. 1979 ; Vol. 36, No. 1. pp. 73-89.
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