HR: 0830h
AN: SA51A-0506    [PDF]
TI: Numerical Simulation of Atmospheric Tidal Variability and Modulation in the Mesosphere and Lower Thermosphere
AU: * Sharma, N
EM: sharma@colorado.edu
AF: University of Colorado at Boulder, Aerospace Engineering Sciences, Boulder, CO 80027 United States
AU: Forbes, J
EM: forbes@colorado.edu
AF: University of Colorado at Boulder, Aerospace Engineering Sciences, Boulder, CO 80027 United States
AB: Considerable research interest exists in studying atmospheric tidal variability and modulation in the mesosphere/lower thermosphere (MLT) region of the atmosphere; presumably these modulations are due to strong wave-wave interaction between planetary waves, tides and gravity waves. Time scales of such variability are observed to be in days to years. Observational evidence exists of tidal modulation at periods of 10 and 16 days, a regular feature of MLT dynamics at high middle latitudes. Various theoretical and observational studies outline nonlinear interaction among tides, planetary and gravity waves as being the dominant process in supporting observed tidal variability. Our research work seeks to extend current modeling capabilities to simulate nonlinear interactions of planetary scale waves and atmospheric tides with effects of gravity waves in order to better understand the tidal amplitude modulation by planetary waves via strong wave-wave nonlinear interactions in the MLT region. We also anticipate significant modeling advances in support of the TIMED mission.
DE: 3332 Mesospheric dynamics
DE: 3337 Numerical modeling and data assimilation
DE: 3384 Waves and tides
SC: SPA - Aeronomy [SA]
MN: 2003 Fall Meeting