Theoretical Analysis of the Temperature Variations and the Krassovsky Ratio for Long Period Gravity Waves

Details Theoretical Analysis of the Temperature Variations and the Krassovsky Ratio for Long Period Gravity Waves Theoretical Analysis of the Temperature Variations and the Krassovsky Ratio for Long Period Gravity Waves

Publishing date

May 2006

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmsa43a..08k&link_type=abstract

Journals

American Geophysical Union, Fall Meeting 2007, abstract #SA43A-08

Science

Physics

Additional info 3

3369 Thermospheric Dynamics (0358), 3309 Climatology (1616, 1620, 3305, 4215, 8408), 3315 Data Assimilation, 3332 Mesospheric Dynamics, 3360 Remote Sensing

Type

Scientific paper

Abstract

Based on the assumption that they are caused by atmospheric gravity waves rather than atmospheric tides, this study aims at developing a theoretical analysis of the long period ( ~ 8 hour) fluctuations of both the Meinel OH band intensity and the rotational temperature. Eddy thermal conduction and eddy viscosity is included in the calculation. In addition, to account for the very long periods, Coriolis force due to earth's rotation will also be taken into account by employing the "shallow atmosphere" approximation. For the first time the height varying background wind is also included in the discussion. Long period fluctuations in the airglow have been measured in many recent experimental observations (Taylor M.J., Gardner L.C., Pendleton W.R., Adv. Space Res., 2001). The Krassovsky ratio which determines the efficiency of producing an intensity fluctuation for a given temperature fluctuation, and also the phase difference between the intensity and temperature fluctuation will be calculated based on the gravity wave assumption.

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