Accession Number:

AD0750082

Title:

A Two-Dimensional Short-Range Fog Forecast Model.

Descriptive Note:

Research and development technical rept.,

Corporate Author:

ARMY ELECTRONICS COMMAND WHITE SANDS MISSILE RANGE N MEX ATMOSPHERIC SCIENCES LAB

Personal Author(s):

Report Date:

1972-05-01

Pagination or Media Count:

76.0

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

Subject Categories:

  • Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE