Characteristics of inertia-gravity waves over Gadanki during the passage of a deep depression over the Bay of Bengal

Details Characteristics of inertia-gravity waves over Gadanki during the passage of a deep depression over the Bay of Bengal Characteristics of inertia-gravity waves over Gadanki during the passage of a deep depression over the Bay of Bengal

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3513804n&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 13, CiteID L13804

Physics

2

Atmospheric Processes: Ocean/Atmosphere Interactions (0312, 4504), Atmospheric Processes: Acoustic-Gravity Waves, Atmospheric Processes: Tropical Meteorology, Atmospheric Processes: Synoptic-Scale Meteorology, Atmospheric Processes: Convective Processes

Scientific paper

Using MST Radar located at the Indian tropical station of Gadanki (13.5°N, 79.2°E near the eastern coast of India), studies have been made on the characteristics of inertia-gravity waves generated in the lower troposphere during deep depression developed over the Bay of Bengal on 20-24 June 2007. Filtering and the hodograph analyses of horizontal winds indicate that the low-pressure system has generated inertia gravity waves, propagating outward from the core of the depression. Strong enhancement of radar reflectivity (SNR) in the heights of ~4-7 km for a few days around 22 June 2007 and the upward propagation of gravity wave energy above this height range indicate that the source of the waves is located at ~4-7 km. This is in agreement with earlier theoretical expectations. The vertical and horizontal wavelengths of gravity waves are found to be ~2.2 km and ~240 km respectively in the troposphere.

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