Abstract
AbstractGravity waves associated with tropical cyclones over the Bay of Bengal have been studied using Constellation Observing System for Meteorology, Ionosphere, and Climate GPS radio occultation measurements. The sources of gravity waves are located well below the tropopause where the intensity of a tropical cyclone is high. The gravity wave potential energy between 19 and 26 km shows an enhancement in the lower stratosphere during the cyclone. Intense convection associated with tropical cyclone is characterized by low outgoing longwave radiation values. The present study shows an increase in potential energy in the lower stratosphere over a storm path before the actual occurrence of cyclones. The power spectral density of gravity waves shows that the vertical wavelengths in the range 2–2.4 km carry the maximum energy in the lower stratosphere over the cyclone path.
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