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International Journal of Geophysics
Volume 2014 (2014), Article ID 514937, 9 pages
http://dx.doi.org/10.1155/2014/514937
Research Article

Airglow Measurements of Gravity Wave Propagation and Damping over Kolhapur (16.5°N, 74.2°E)

1MF Radar, Indian Institute of Geomagnetism, Kolhapur 416004, India
2National Atmospheric Research Laboratory, Gadanki 517112, India
3Indian Institute of Geomagnetism, Navi Mumbai 410218, India
4Department of Physics, Shivaji University, Kolhapur 416004, India
5Department of Physics, Sanjay Ghodawat Group of Institutions, Atigre, Kolhapur 41611, India

Received 1 May 2014; Revised 12 June 2014; Accepted 12 June 2014; Published 7 July 2014

Academic Editor: Steve Milan

Copyright © 2014 R. N. Ghodpage et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Simultaneous mesospheric OH and O  (1S) night airglow intensity measurements from Kolhapur (16.8°N, 74.2°E) reveal unambiguous gravity wave signatures with periods varying from 01 hr to 9 hr with upward propagation. The amplitudes growth of these waves is found to vary from 0.4 to 2.2 while propagating from the OH layer (~87 km) to the O (1S) layer (~97 km). We find that vertical wavelength of the observed waves increases with the wave period. The damping factors calculated for the observed waves show large variations and that most of these waves were damped while traveling from the OH emission layer to the O (1S) emission layer. The damping factors for the waves show a positive correlation at vertical wavelengths shorter than 40 km, while a negative correlation at higher vertical wavelengths. We note that the damping factors have stronger positive correlation with meridional wind shears compared to the zonal wind shears.