Physics – Geophysics
Scientific paper
Sep 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jgrd..11218108l&link_type=abstract
Journal of Geophysical Research, Volume 112, Issue D18, CiteID D18108
Physics
Geophysics
14
Atmospheric Processes: Middle Atmosphere Dynamics (0341, 0342), Atmospheric Processes: Tides And Planetary Waves, Mathematical Geophysics: Wave Propagation (0689, 2487, 4275, 4455, 6934), Atmospheric Processes: Mesospheric Dynamics
Scientific paper
The wind and temperature measurements from an unusually long period operation of the sodium lidar at Colorado State University (41°N, 105°W) around September equinox 2003 showed significant short-term tidal variability. Coincident with the large tidal changes, a strong temperature inversion layer was also observed above 90 km. Examination of the simultaneous temperature measurement from the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument, on board the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite, not only confirms the existence of the inversion layer but also reveals the global nature of the inversion, suggesting the presence of a transient planetary wave in the mesosphere. The large tidal variability, therefore, is probably a consequence of the interaction between the transient planetary wave and tides. This possibility is investigated by using the NCAR thermosphere-ionosphere-mesosphere-electrodynamics general circulation model (TIME-GCM) and by comparing model results with the lidar, SABER, and TIMED Doppler Interferometer (TIDI) measurements. With a large transient planetary wave specified at the model lower boundary, the model is able to produce strong diurnal tidal variability comparable to that from the lidar observation, and the modeled temperature inversion is similar to that from the SABER measurement. The model results suggest that the planetary/tidal wave interaction excites nonmigrating tides and modulates the gravity modes and/or the rotational modes of the diurnal migrating tide. Among the nonmigrating tides, the diurnal zonally symmetric (S = 0) component is the strongest, and its interaction with the planetary wave leads to a strong diurnal eastward wave number 1 component.
Hagan Maura E.
Li Tiancheng
Liu Hong-Lin
Mlynczak Martin G.
Oberheide Jens
No associations
LandOfFree
Comparative study of short-term diurnal tidal variability does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Comparative study of short-term diurnal tidal variability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparative study of short-term diurnal tidal variability will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-967879