MST radar investigation on inertia-gravity waves associated with tropical depression in the upper troposphere and lower stratosphere over Gadanki (13.5°N, 79.2°E)

Details MST radar investigation on inertia-gravity waves associated with tropical depression in the upper troposphere and lower stratosphere over Gadanki (13.5°N, 79.2°E) MST radar investigation on inertia-gravity waves associated with tropical depression in the upper troposphere and lower stratosphere over Gadanki (13.5°N, 79.2°E)

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jastp..72.1184s&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 72, Issue 16, p. 1184-1194.

Physics

3

Scientific paper

Continuous measurements of 3-dimensional winds, spectral parameters, and tropopause height for ˜114 h during the passage of a tropical depression using mesosphere-stratosphere-troposphere (MST) radar at Gadanki (13.5°N, 79.2°E) are discussed. The spectral analysis of zonal and meridional winds shows the presence of inertia-gravity wave (IGW) with the dominant periodicity of 56 h and intrinsic period of 27 h in the upper troposphere and lower stratosphere (UTLS). The strengthening of easterly jet and associated wind shears during the passage of the depression is one of the causative mechanisms for exciting the IGW. A well-established radar method is used to identify the tropopause and to study its response to the propagating atmospheric disturbances. The significance of the present study lies in showing the response of tropopause height to the IGW during tropical depression for the first time, which will have implications in stratosphere-troposphere exchange processes.

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