HR: 0830h
AN: SA41B-0455    [PDF]
TI: Yearlong Na-Lidar observation of temperature and winds over full diurnal cycles above Ft. Collins, CO (40$\deg$N, 105$\deg$): Diurnal and semidiurnal tidal perturbations
AU: * Yuan, T
EM: titus@lamar.colostate.edu
AF: Colorado State University, 200 West Lake Street, Fort Collins, CO 80523 United States
AU: She, C
EM:
AF: Colorado State University, 200 West Lake Street, Fort Collins, CO 80523 United States
AU: Krueger, D
EM:
AF: Colorado State University, 200 West Lake Street, Fort Collins, CO 80523 United States
AU: Hagan, M
EM:
AF: National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80305 United States
AB: With a pair of robust Faraday Filters, Na-Lidar in Colorado State University has observed mesopause region temperature and winds (80-110km) over full diurnal cycle for more than one year. Here, we select only continuous 24-hour data sets with a total of 29 sets between May 02 and April 03 and form bi-monthly means for tidal analysis. We observed considerable daytime and nighttime differences for both temperature and winds (Zonal and Meridional). We investigated the tidal wave (Diurnal and Semi-Diurnal) activities and compared with GSWM (Global Scale Wave Model) and TIME-GCM output. Observed diurnal tides are in good agreement with GSWM prediction, though some discrepancies exist in semidiurnal tides comparison. Larger amplitude and shorter wavelength than what model predict are typically observed for semidiurnal tides. Data acquired after April 03 are used to assess tidal variability.
DE: 3332 Mesospheric dynamics
SC: SPA - Aeronomy [SA]
MN: 2003 Fall Meeting