Nonmigrating Diurnal Tidal Variability in Mesopause Region Winds: TIDI, TIME-GCM and GSWM Comparisons

Details Nonmigrating Diurnal Tidal Variability in Mesopause Region Winds: TIDI, TIME-GCM and GSWM Comparisons Nonmigrating Diurnal Tidal Variability in Mesopause Region Winds: TIDI, TIME-GCM and GSWM Comparisons

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsa34a..01o&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SA34A-01

Physics

3332 Mesospheric Dynamics, 3334 Middle Atmosphere Dynamics (0341, 0342), 3384 Waves And Tides

Scientific paper

We compare nonmigrating diurnal wind estimates determined from measurements made by the TIMED Doppler Inteferometer (TIDI) instrument on the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite with predictions from the NCAR Thermosphere-Ionosphere-Mesosphere-Electrodynamics General Circulation Model (TIME-GCM) and the Global-Scale Wave Model (GSWM). The models account for two different nonmigrating tidal sources. The GSWM includes tropospheric latent heat release associate with deep tropical convection, while the TIME-GCM includes nonlinear interactions between quasi-stationary planetary waves and migrating tides. The model and measurement comparisons suggest that both sources are important to the interpretation of the TIDI tidal winds. We contrast the true model tidal results with estimates that we determine from the subsets of model wind predictions that represent what TIDI would observe if it flew through the model atmospheres. These contrasts allow us to quantify the sampling issues associated determining tidal signatures from the slowly precessing TIMED TIDI satellite data.

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