Articles | Volume 9, issue 1
https://doi.org/10.5194/amt-9-93-2016
https://doi.org/10.5194/amt-9-93-2016
Research article
 | 
18 Jan 2016
Research article |  | 18 Jan 2016

Mesospheric gravity wave characteristics and identification of their sources around spring equinox over Indian low latitudes

M. Sivakandan, I. Paulino, A. Taori, and K. Niranjan

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Cited articles

Alexander, M. J.: A simulated spectrum of convectively generated gravity waves: Propagation from the tropopause to the mesopause and effects on the middle atmosphere, J. Geophys. Res., 101, 1571–1588, https://doi.org/10.1029/95JD02046, 1996.
Ding, F., Yuan, H., Wan, W., Reid, I. M., and Woithe, J. M.: Occurrence characteristics of medium-scale gravity waves observed in OH and OI nightglow over Adelaide (34.5° S, 138.5° E), J. Geophys. Res. D Atmos., 109, 1–10, https://doi.org/10.1029/2003JD004096, 2004.
Ejiri, M. K., Shiokawa, K., Ogawa, T., Igarashi, K., Nakamura, T., and Tsuda, T.: Statistical study of short-period gravity waves in OH and OI nightglow images at two separated sites, J. Geophys. Res., 108, 4679, https://doi.org/10.1029/2002JD002795, 2003.
Fritts, D. C. and Alexander, M. J.: Gravity wave dynamics and effects in the middle atmosphere, Rev. Geophys., 41, 1003, https://doi.org/10.1029/2001RG000106, 2003.
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Short summary
The small-scale gravity waves are the least understood processes in the middle-atmospheric variability. Using airglow imaging, we provide new measurements of gravity wave propagation over equatorial latitudes in India. We find that propagation of waves is often in the opposite direction to the tropospheric convective regions. These waves are found to have horizontal wavelengths ranging from 12 to 42 km, with the phase velocities in the 20 to 90 km range.