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Author Guharay, A. ♦ Nath, D. ♦ Pant, P. ♦ Pande, B. ♦ Russell III, J. M. ♦ Pandey, K.
Source Aryabhatta Research Institute of Observational Sciences (ARIES)
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics
Subject Keyword Meteorology ♦ Atmospheric Dynamics
Abstract Extensive measurement of middle atmospherictemperature with the help of lidar data of more than 10 years(1998–2008) and TIMED/SABER data of 7 years (2002–2008), has been carried out from a low latitude station,Gadanki, India (13.5° N, 79.2° E), which exhibits the presenceof semiannual oscillation (SAO) and annual oscillation(AnO). The AnO component is stronger in the mesosphericregion (80–90 km) and the SAO is dominant at stratosphericaltitudes (30–50 km). Overall, the AnO possesses higheramplitude ~6–7 K, and the SAO shows less amplitude ~1–2 K. The AnO present at 90 km finds crest near summer solstice,and the same at 80 km shows peak near winter solsticewith a downward progression speed ~1.7 km/month.The SAO propagates downward with an average phase speed ~9 km/month and phase maximizes around equinox and solsticeat 50 and 30 km, respectively. The observed SAO hasalso shown seasonal asymmetry in peaks.
Part of series ag27-4273
Educational Use Research
Education Level UG and PG
Learning Resource Type Article