World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Observation of Semiannual and Annual Oscillation in Equatorial Middle Atmospheric Long Term Temperature Pattern : Volume 27, Issue 11 (16/11/2009)

By Guharay, A.

Click here to view

Book Id: WPLBN0003973803
Format Type: PDF Article :
File Size: Pages 8
Reproduction Date: 2015

Title: Observation of Semiannual and Annual Oscillation in Equatorial Middle Atmospheric Long Term Temperature Pattern : Volume 27, Issue 11 (16/11/2009)  
Author: Guharay, A.
Volume: Vol. 27, Issue 11
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Description: Aryabhatta Research Institute of observational scienES (ARIES), Nainital, India. Extensive measurement of middle atmospheric temperature 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 presence of semiannual oscillation (SAO) and annual oscillation (AnO). The AnO component is stronger in the mesospheric region (80–90 km) and the SAO is dominant at stratospheric altitudes (30–50 km). Overall, the AnO possesses higher amplitude ~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 solstice with 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 solstice at 50 and 30 km, respectively. The observed SAO has also shown seasonal asymmetry in peaks.

Observation of semiannual and annual oscillation in equatorial middle atmospheric long term temperature pattern

Clancy, R. T., Rusch, D. W., and Callan, M. T.: Temperature minima in the average thermal structure of the middle atmosphere (70-80 km) from analysis of 40- to 92-km SME global temperature profiles, J. Geophys. Res., 99, 19001–19020, 1994.; Forbes, J. M. and Gillette, D. F.: A compendium of theoretical atmospheric tidal structures, Part 1, Model description and explicit structures due to realistic thermal and gravitational excitation, Project 6690, Rep. AFGL-TR-82-0173, Air Force Geophys. Lab., Bedford, Mass., 1982.; Gelinas, L. J., Hecht, J. H., Walterscheid, R. L., Roble, R. G., and Woithe, J. M.: A seasonal study of mesospheric temperatures and emission intensities at Adelaide and Alice Springs, J. Geophys. Res., 113, A01304, doi:10.1029/2007JA012587, 2008.; Groves, G. V.: Annual and semi-annual zonal wind components and corresponding temperature and density variations, 60–130 km, Planet. Space Sci., 20, 2099–2112, 1972.; Guharay, A., Taori, A., and Taylor, M.: Summer-time nocturnal wave characteristics in mesospheric OH and O2 airglow emissions, Earth Planets Space, 60, 973–979, 2008.; Guharay, A., Nath, D., Pant, P., Pande, B., Russell III, J. M., and Pandey, K.: Middle atmospheric thermal structure obtained from Rayleigh lidar and TIMED/SABER observations: A comparative study, J. Geophys. Res., 114, D18105, doi:10.1029/2009JD011963, 2009.; Gurubaran, S. and Rajaram, R.: Mean winds, tides, and gravity waves during the westward phase of the mesopause semiannual oscillation (MSAO), J. Geophys. Res., 106(23), 31817–31824, 2001.; Hauchecorne, A. and Chanin, M. -L.: Density and temperature profiles obtained by lidar between 30 and 70 km, Geophys. Res. Lett., 7, 565–568, 1980.; Hirota, I.: Equatorial waves in the upper stratosphere and mesosphere in relation to the semiannual oscillation of the zonal wind, J. Atmos. Sci., 35, 714–722, 1978.; Kishore Kumar, G., Venkat Ratnam, M., Patra, A. K., Vijaya Bhaskara Rao, S., and Russell, J.: Mean thermal structure of the low-latitude middle atmosphere studied using Gadanki Rayleigh lidar, Rocket, and SABER/TIMED observations, J. Geophys. Res., 113, D23106, doi:10.1029/2008JD010511, 2008.; Mayr, H. G., Mengel, J. G., Hines, C. O., Chan, K. L., Arnold, N. F., Reddy, C. A., and Porter, N. S.: The gravity wave Doppler spread theory applied in a numerical spectral model of the middle atmosphere: 2. Equatorial oscillations, J. Geophys. Res., 102, 26093–26105, 1997.; Mertens, C. J., Schmidlin, F. J., Goldberg, R. A., et al.: SABER observations of mesospheric temperatures and comparisons with falling sphere measurements taken during the 2002 summer MaCWAVE campaign, Geophys. Res. Lett., 31, L03105, doi:10.1029/2003GL018605, 2004.; Ratnam, M. V., Kumar, G. K., Murthy, B. V. K., Patra, A. K., Rao, V. V. M. J., Rao, S. V. B., Kumar, K. K., and Ramkumar, G.: Long-term variability of the low latitude mesospheric SAO and QBO and their relation with stratospheric QBO, Geophys. Res. Lett., 35, L21809, doi:10.1029/2008GL035390, 2008.; Reed, R. J.: The quasi-biennial oscillation of the atmosphere between 30 and 50 km over Ascension Island, J. Atmos. Sci., 22, 331–333, 1965.; Remsberg, E. E., Marshall, B. T., Garcia-Comas, M., et al.: Assessment of the quality of the version 1.07 temperature-versus-pressure profiles of the middle atmosphere from TIMED/SABER, J. Geophys. Res., 113, D17101, doi:10.1029/2008JD010013, 2008.; Russell III, J. M., Mlynczak, M. G., Gordley, L. L., Tansock, J., and Esplin, R.: An overview of the SABER experiment and preliminary calibration results, in Proceedings of the SPIE, 44th Annual Meeting, Denver, Colorado, 18–23 July, vol. 3756, pp. 277–288, 1999.; Shepherd, M. G., Evans, W. F. J., Hernandez, G., Offermann, D., and Takahashi, H.: Global variability of mesospheric temperature: Mean temperature field, J. Geophys. Res., 109, D24117, doi:10.1029/2004JD005054, 2004.; Shepherd, M. G., Shepherd, G. G., Evans, W. F. J., and Sridharan, S.: Global variabilit


Click To View

Additional Books

  • A Numerical Study on the Impact of Nonli... (by )
  • Dust Aerosols Over India and Adjacent Co... (by )
  • Observations of the Cusp Region Under No... (by )
  • Computer Simulations for Direct Conversi... (by )
  • Storm-time Related Mass Density Anomalie... (by )
  • Properties and Origin of Energetic Parti... (by )
  • Storm Time Dynamics of Auroral Electroje... (by )
  • Storm Time Changes in Total Electron Con... (by )
  • Combining T/P Altimetric Data with Hydro... (by )
  • Plasma Convection at High Latitudes Usin... (by )
  • An Optical Study of Multiple Neial Event... (by )
  • Oh-equivalent Temperatures Derived from ... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Fair are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.