Physics
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jastp..72.1204b&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 72, Issue 16, p. 1204-1211.
Physics
Scientific paper
Spectral analysis of Tirunelveli (8.7°N, 77.8°E) MF radar winds for the year 2007 indicate the presence of long-period Kelvin waves with periods ˜23 and ˜16 days in the low-latitude mesosphere during Indian summer monsoon months. The dominant presence of these slow-phase speed waves at mesospheric altitudes motivated us to investigate their origin and vertical propagation characteristics. Space-time Fourier analysis of NCEP winds and OLR show the presence of these periodicities with zonal wavenumber 1 indicating that tropical convection is the potential source for these waves and westward phase of stratospheric QBO winds might have favoured these waves to reach the mesosphere.
Bhagavathiammal G. J.
Gurubaran S.
Lal Manohar
Nair K. U.
Sathishkumar S.
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