HR: 0800h
AN: SA11A-0223    [Abstracts]
TI: Theoretical Analysis of the Temperature Variations and the Krassovsky Ratio for Long Period Gravity Waves
AU: * Kariyawasam, T M
EM: tharanga@physics.uc.edu
AF: University of Cincinnati, Department of Physics, ML 11, University of Cincinati, Cincinnati, OH 45221-0011 United States
AU: Tuan, T F
EM: tuan@physics.uc.edu
AF: University of Cincinnati, Department of Physics, ML 11, University of Cincinati, Cincinnati, OH 45221-0011 United States
AB: 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 also be calculated based on the gravity wave assumption.
DE: 0310 Airglow and aurora
SC: SPA-Aeronomy [SA]
MN: Fall Meeting 2005