HR: 17:15h
AN: SA14A-06 INVITED     [Abstracts]
TI: Mesosphere-Thermosphere Coupling
AU: * Forbes, J M
EM: forbes@colorado.edu
AF: University of Colorado, Department of Aerospace Engineering Sciences UCB 429, Boulder, CO 80309 United States
AU: Palo, S E
EM: palo@colorado.edu
AF: University of Colorado, Department of Aerospace Engineering Sciences UCB 429, Boulder, CO 80309 United States
AU: Svoboda, A
EM: asvoboda@odo.colorado.edu
AF: University of Colorado, Department of Aerospace Engineering Sciences UCB 429, Boulder, CO 80309 United States
AU: Hagan, M E
EM: hagan@ucar.edu
AF: National Center for Atmospheric Research, High Altitude Observatory P.O. Box 3000, Boulder, CO 80307 United States
AU: Miyahara, S
EM: sbm@geo.kyushu-u.ac.jp
AF: Kyushu University, Department of Earth and Planetary Science, Fukuoka, 812-8581 Japan
AU: Yoshikawa, M
EM: myoshikawa@geo.kyushu-u.ac.jp
AF: Kyushu University, Department of Earth and Planetary Science, Fukuoka, 812-8581 Japan
AB: The mesosphere supplies energy, momentum and heat to the thermosphere via upward-propagating tides, gravity waves and planetary waves that originate at various levels in the atmosphere. These waves redistribute neutral and ionized constituents, and generate electric fields. Their relevance to thermosphere-ionosphere variability becomes particular evident during solar minimum, when effects due to solar particle and EUV radiation are subdued. In this paper, three aspects of the problem are elucidated: (1) The use of general circulation models to provide information on wave coupling into the thermosphere; (2) the use of Hough Mode Extensions to estimate total mass density variability consistent with wind or temperature observations measured near the mesopause; and (3) the combined use of measurements and theory to estimate the zonal mean winds and temperatures generated due to dissipation of upward-propagating tides.
DE: 3332 Mesospheric dynamics
DE: 3334 Middle atmosphere dynamics (0341, 0342)
DE: 3369 Thermospheric dynamics (0358)
DE: 3384 Waves and tides
SC: SPA-Aeronomy [SA]
MN: 2004 AGU Fall Meeting