Physics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.3851f&link_type=abstract
Geophysical Research Letters, Volume 28, Issue 20, p. 3851-3854
Physics
19
Meteorology And Atmospheric Dynamics: Mesospheric Dynamics, Meteorology And Atmospheric Dynamics: Middle Atmosphere Dynamics, Meteorology And Atmospheric Dynamics: Thermospheric Dynamics, Meteorology And Atmospheric Dynamics: Waves And Tides
Scientific paper
Diurnal tides are forced in a global-scale wave model using monthly mean tropospheric heating rates from the NCEP/NCAR Reanalysis Project. The heating rates give rise to a semiannual variation in the migrating (sunsynchronous) tidal wind response near 95 km altitude with equinoctial maxima (~50-70 ms-1) similar in magnitude to those derived from observational data. Nonmigrating (longitude-dependent) tides with zonal wavenumbers s=-3 (eastward) to s=+5 (westward) are also generated. Many of these oscillations are characterized by wind and temperature amplitudes of order 20-30 ms-1 and 10-20 K in the lower thermosphere (100-130 km), and suggest that the tidal response in this regime varies considerably with longitude.
Forbes Jeffrey M.
Hagan Maura E.
Zhang Xiaoli
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