A Two-Dimensional Short-Range Fog Forecast Model.
Abstract
RSAL, FORTRAN, FORTRAN 5 PROGRAMMING LANGUAGEA two-dimensional dynamical model is developed for the specific purpose of forecasting fog for time periods of as much as eight hours on a local scale. Time-dependent winds are generated by calculating a streamfunction from a model-produced vorticity field. A diurnal variation at the surface is simulated by sinusoidally varying boundary conditions on temperature. Surface terrain effects can be incorporated through boundary conditions to provide a means of adapting the method to a particular location. Only grosser features of microphysical processes have been incorporated, and the values of the wind forecasts are limited by the inability of a two-dimensional model in the X-Z plane to include synoptic-scale variations. Fine-scale data are required for the model, which is thereby well-suited to provide forecast support for such activities as fog modification experiments. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1972
- Accession Number
- AD0750082
Entities
People
- Charles A. Doswell Iii
Organizations
- Atmospheric Sciences Laboratory