Gravity and Acoustic Waves Applied to the Dynamics and Kinematics of the Atmosphere.
Final rept. 15 May 74-1 Nov 80,
COLUMBIA UNIV NEW YORK
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A generalized review of the work accomplished in the direct and spin-off areas supported over the past six years in the following areas is presented 1 Use of infrasound as an Atmospheric Probe Infrasonic signals from natural and artificial sources were used as a passive probe of the atmosphere. 2 Gravity Wave Program In this study, an array of sensitive microbarographs microbarovariographs is used rather than microphones. Results so far show that surface gravity waves were related to the presence of wind shear aloft and often constitute continuous background perturbations. Gravity waves also shown to characterize the approach of warm fronts aloft, often well before the advent of precipitation and other storm features. Gravity waves were also shown to be of possible importance in generating thunderstorms through the triggering action at times unstable or conditionally unstable conditions. Author