First observations of quasi 120 day oscillation in Mesospheric winds and temperature: Observations inferred from Meteor Radar
Article first published online: 19 JUN 2013
©2013. American Geophysical Union. All Rights Reserved.
Volume 48, Issue 3, pages 310–315, May-June 2013
How to Cite
2013), First observations of quasi 120 day oscillation in Mesospheric winds and temperature: Observations inferred from Meteor Radar, Radio Sci., 48, 310–315, doi:10.1002/rds.20037., , and (
- Issue published online: 16 JUL 2013
- Article first published online: 19 JUN 2013
- Accepted manuscript online: 1 MAY 2013 04:45PM EST
- Manuscript Accepted: 17 APR 2013
- Manuscript Revised: 20 JAN 2013
- Manuscript Received: 22 MAR 2012
- Quasi-120 day oscillation;
- MLT region;
- Meteor radar;
 For the first time, the presence of quasi 120 day oscillation in the neutral winds and temperature at mesosphere and lower thermosphere (MLT) region, measured using meteor wind radar over an equatorial station Thumba (8.5°N, 76.5°E) is discussed. The amplitudes of quasi 120 day oscillation as a function of height have been established over Thumba. The origin of the quasi 120 day oscillation in geophysical parameters at MLT heights are discussed in terms of the atmospheric angular momentum, F10.7, and Lyman-alpha solar flux and nonlinear interactions between annual and semiannual oscillations. The significance of the present study lies in providing the observational evidence for quasi 120 day oscillation in the MLT region and in discussing the possible source mechanisms for the observed oscillation.