Objective and Dynamic Analyses of Tropical Weather.
Semiannual rept. no. 2, 18 Sep 68-18 Mar 69,
STANFORD RESEARCH INST MENLO PARK CALIF
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Various approaches were tested for deriving wind information from satellite cloud photographs made by the ATS-3 satellite. Approaches tested included estimating a wind-vector field from cloud-motion measurements altering the kinematic properties divergence and vorticity to fit cloud distributions and estimating wind speeds from satellite-derived wind direction. All these schemes gave wind fields that were in reasonable agreement with the available station winds and provided excellent background fields for analyzing the station data. A multilayer baroclinic model was developed for the purpose of making shortrange tropical forecasts. The model is based primarily on the vorticity equation and is designed to operate on the actual wind fields rather than the pressure and temperature fields. At present, testing of the model has been restricted to considerations of internal consistency and to comparisons with barotropic forecasts. Preliminary objective analyses were performed using available rawinsonde data over Southeast Asia in order to test the applicability of objective analyses and forecasting techniques in this area. Author