Accession Number : AD0803654

Title :   NUMERICAL TESTING OF A GEOSTROPHIC DIVERGENT MODEL.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Ford, Joseph Patrick

Report Date : OCT 1966

Pagination or Media Count : 50

Abstract : A divergent geostrophic prediction model proposed by Duthie is investigated to determine its usefulness in producing realistic forecasts and to determine the feasibility of further research using the gradient wind. Twenty four hour forecasts were made using the prediction equation, at 300 mb, 500 mb, and 850 mb for summer and winter situations. Tables presenting the error fields for these tests are included, along with the plotted forecast and verifying maps. At both 500 mb and 850 mb the waves of the tuned model move with a speed consistent with the verifying waves and the location and intensity of the centers agree remarkably well. At 300 mb the model tends to move systems too far. This is due to the use of a geostrophic wind with the strong zonal components at this level. In view of the close agreement at 500 mb and below, it is felt that further investigation is warrented, incorporating the gradient wind in lieu of the geostrophic wind, the geostrophic relative vorticity and daily testing begun over an extended period to determine the feasibility of this model for possible operational use.

Descriptors :   (*WEATHER FORECASTING, MATHEMATICAL MODELS), (*ATMOSPHERIC MOTION, MATHEMATICAL ANALYSIS), DIFFERENTIAL EQUATIONS, GUSTS, OPERATORS(MATHEMATICS), METEOROLOGICAL CHARTS, MATHEMATICAL PREDICTION.

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE