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Tidal and gravity waves study from the airglow measurements at Kolhapur(India)

Ghodpage, RN and Siingh, D and Singh, RP and Mukherjee, GK and Vohat, P and Singh, AK (2012) Tidal and gravity waves study from the airglow measurements at Kolhapur(India). Journal of Earth System Science, 121 (6). pp. 1511-1525.

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Simultaneous photometric measurements of the OI 557.7 nm and OH (7, 2) band from a low latitude station, Kolhapur (16.8° N, 74.2° E) during the period 2004-2007 are analyzed to study the dominant waves present in the 80-100 km altitude region of the atmosphere. The nocturnal intensity variations of different airglow emissions are observed using scanning temperature controlled filter photometers. Waves having period lying between 2 and 12 hours have been recorded. Some of these waves having subharmonic tidal oscillation periods 4, 6, 8 and 12 hours propagate upward with velocity lying in the range 1.6-11.3 m/s and the vertical wave length lying between 28.6 and 163 kms. The other waves may be the upward propagating gravity waves or waves resulting from the interaction of inter-mode tidal oscillations, interaction of tidal waves with planetary waves and gravity waves. Some times, the second harmonic wave has higher vertical velocity than the corresponding fundamental wave. Application of these waves in studying the thermal structure of the region is discussed.

Item Type: Article
Additional Information: Copyright of this article belongs to Indian Academy of Sciences.
Uncontrolled Keywords: airglow; atmospheric wave; gravity wave; mesosphere; photometer; planetary wave; thermal structure; thermosphere; wave propagation, India; Kolhapur; Maharashtra
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 07 Jun 2014 08:29
Last Modified: 07 Jun 2014 08:29

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