HR: 16:45h
AN: SA32B-04    [PDF]
TI: Observations of Seasonal Variations of Mesosphere and Lower Thermosphere Tides by the TIMED Doppler Interferometer
AU: * Killeen, T L
EM: killeen@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell La., Boulder, CO 80301 United States
AU: Wu, Q
EM: qwu@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell La., Boulder, CO 80301 United States
AU: Clyne, J
EM: clyne@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell La., Boulder, CO 80301 United States
AU: Gablehouse, R D
EM: rdg@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell La., Boulder, CO 80301 United States
AU: Gell, D A
EM: gellda@umich.edu
AF: National Center for Atmospheric Research, 3450 Mitchell La., Boulder, CO 80301 United States
AU: Johnson, R M
EM: rmjohnsn@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell La., Boulder, CO 80301 United States
AU: Kafkalidis, J F
EM: juliek@umich.edu
AF: The University of Michigan, 2455 Hayward, Ann Arbor, MI 48019 United States
AU: Niciejewski, R J
EM: niciejew@umich.edu
AF: The University of Michigan, 2455 Hayward, Ann Arbor, MI 48019 United States
AU: Ortland, D A
EM: ortland@nwra.com
AF: Northwest Research Associates, P.O. Box 3027, Bellevue, WA 98009 United States
AU: Skinner, W R
EM: wskinner@umich.edu
AF: The University of Michigan, 2455 Hayward, Ann Arbor, MI 48019 United States
AU: Solomon, S C
EM: stans@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell La., Boulder, CO 80301 United States
AB: Using neutral wind measurements by the TIMED Doppler Interferometer (TIDI), we examine seasonal variations in the migrating tide. TIDI samples four local times at latitudes between 60N and 60S on every orbit. The instrument measures winds from 70 to 105 km altitude during the day and 85 to 100 km during the night. Since the orbital precession rate of the TIMED satellite is 3 degree/day, it takes 60 days (one yaw period) for TIDI to sample the full range of solar times. We examine the possibility of extracting tidal wave features using data periods of less than 60 days. In spite of the limitation on local time coverage, TIDI can provide a global view of the tidal structure. The observational results will be compared with model runs from GSWM02 and the TIME-GCM. We also compare tidal amplitudes and phases obtained from TIDI with ground-based observations.
DE: 0341 Middle atmosphere--constituent transport and chemistry (3334)
DE: 0342 Middle atmosphere--energy deposition
DE: 3334 Middle atmosphere dynamics (0341, 0342)
DE: 3369 Thermospheric dynamics (0358)
DE: 3384 Waves and tides
SC: SPA - Aeronomy [SA]
MN: 2003 Fall Meeting