Computer Science – Sound
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icsu...18q....r&link_type=abstract
In International Council of Scientific Unions Handbook for MAP, Vol. 18 3 p (SEE N86-27719 18-46)
Computer Science
Sound
Balloon Sounding, India, Middle Atmosphere, Planetary Waves, Rossby Regimes, Stratosphere, Winds Aloft, Atlantic Ocean, Equatorial Regions, Indian Ocean, Monsoons, Pacific Ocean
Scientific paper
In the early studies based on time series of balloon observations, the existence of 4 to 5 day period waves and 10 to 20 day wind fluctuations were found in the tropical lower stratosphere, and they are identified theoretically as the mixed Rossby-gravity wave and the Kelvin wave, respectively. On the basis of these studies, it was established that the vertically propagating equatorial waves play an important role in producing the QBO (quasi-biennial oscillation) in the mean zonal wind through the mechanism of wave-zonal interaction. These studies are mainly concentrated over the equatorial Pacific and Atlantic Oceans. Similar prominent wave disturbances have been observed over the region east of the Indian Ocean during a quasi-biennial oscillation. Zonal winds in upper troposphere and lower stratosphere (10 to 20) km of the middle atmosphere over the Indian subcontinent may bear association with the activity of summer monsoon (June-September). Monsoon Experiment (MONEX-79) has provided upper air observations at Balasore (21 deg. 30 min.N; 85 deg. 56 min.E), during the peak of monsoon months July and August. A unique opportunity has, therefore, been provided to study the normal oscillations present in the zonal winds of lower middle atmosphere over India, which may have implication on large scale wave dynamics. This aspect is examined in the present study.
Indira K.
Mukherjee Binu K.
Murty V. R. B.
Reddy Rohith Singi
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