Modeling the MLT Region in Light of Measurements From the TIMED Mission

Details Modeling the MLT Region in Light of Measurements From the TIMED Mission Modeling the MLT Region in Light of Measurements From the TIMED Mission

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsa41b0452m&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SA41B-0452

Physics

3319 General Circulation, 3332 Mesospheric Dynamics, 3337 Numerical Modeling And Data Assimilation, 3367 Theoretical Modeling, 3384 Waves And Tides

Scientific paper

Our Numerical Spectral Model (NSM) extends from the ground up to the thermosphere and incorporates Hines' Doppler Spread Parameterization for small-scale gravity waves. This model describes in the mesosphere the major features of: (a) the equatorial oscillations (QBO and SAO), (b) the migrating as well as non-migrating tides, and (c) the planetary waves. The model also generates distinct intra-seasonal oscillations with periods around 3 months and planetary-scale inertio gravity waves with periods around 10 hours. After a review of the model and major findings, we discuss the scientific investigations to be carried out with the measurements from the TIMED mission. As part of this investigation, we shall attempt to describe the observations empirically (statistically) with vector spherical harmonics that delineate the temperature and wind fields in terms of zonal wave numbers, m = 0 to 4. The spectral formulation of the model allows us then to study the observed dynamical components and their interactions. With emphasis on the dynamics and energetics of the mesosphere, we shall compare some of our model simulations with temperature data from SABER and winds derived from TIDI measurements. We shall also present model predictions for comparison with coordinated ground-based observations.

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