Objective and Dynamic Analyses of Tropical Weather

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 distribution...

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Bibliographische Detailangaben
Hauptverfasser: Mancuso,Robert L, Endlich,Roy M
Format: Report
Sprache:eng
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Zusammenfassung: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) See also Semiannual rept. no. 1 dated Nov 68, AD-845 265.