A PHYSICAL LOW-CLOUD PREDICTION MODEL

Abstract

Results of three 12-hour forecasts (for different synoptic situations), computed with the model, are presented. Equations for the contact layer were derived for the forced convection, free convection, and strong inversion regimes. The requirement for upper boundary conditions is reduced; only the geostrophic wind components and upper-level cloudiness are required from a free-air model. Empirical methods were developed for computing the instrument shelter level temperature and relative humidity. The eddy diffusion coefficient for heat and water is a function of the Richardson number throughout the boundary layer. The linear geostrophic wind shear within the boundary layer is computed from the predicted temperature. The model has not been thoroughly tested: preliminary results suggest that, given a careful analysis of routine observational data, this boundary layer model will serve operationally- meaningful diagnostic and predictive functions. The logic used in constructing the computer program for the model is presented.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1965
Accession Number
AD0623461

Entities

People

  • Joseph P. Gerrity

Organizations

  • United Technologies Corporation

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Air Force
  • Boundary Layer
  • Cartesian Coordinates
  • Climate Change
  • Coefficients
  • Computer Programs
  • Computers
  • Convection
  • Differential Equations
  • Grids
  • Heat Energy
  • Heat Transfer
  • Isotherms
  • Latent Heat
  • Layers
  • Stratified Fluids
  • Thermodynamics

Fields of Study

  • Environmental science

Readers

  • Atmospheric Science/Meteorology
  • Computational Modeling and Simulation
  • Fluid Dynamics.