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Title: Oscillation of tropical tropopause during passage of atmospheric waves
Authors: Rao, Y Jaya
Jain, A R
Issue Date: Aug-2000
Publisher: NISCAIR-CSIR, India
Abstract: Tropopause, the upper boundary of the troposphere, is characterized by the hydrostatic stability and plays key role in stratosphere-troposphere exchange (STE). Variation in the height of the tropopause is one of the mechanisms through which interaction between tropospheric and stratospheric air takes place. In the present paper the height of the tropical tropopause derived from radiosonde observations at Chennai and high range resolution measurements of horizontal winds made using VHF radar at Gadanki, during the period December 1995-April 1996, have been used to study the effect of atmospheric oscillations on tropical tropopause. Results clearly show three prominent oscillations with periodicities (i) 50-70 days (ii) 30-50 days and (iii) 10-20 days in these parameters, with rapid attenuation in the amplitudes for longer periodicities as compared to that of smaller period oscillations. The results provide clear evidence of leakage of energy from troposphere to stratosphere through tropopause.
Page(s): 203-209
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections:IJRSP Vol.29(4) [August 2000]

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