HR: 1340h
AN: SA53A-1156    [Abstracts]
TI: Observation of mesospheric wind and temperature concerning the Antarctic sudden stratospheric warming event in 2002
AU: * Kawahara, T D
EM: kawahara@cs.shinshu-u.ac.jp
AF: Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano-shi, 380-8553 Japan
AU: Tsutsumi, M
EM: tutumi@nipr.ac.jp
AF: National Institute of Polar Research, Kaga 1-9-10 Itabashi, Tokyo, 173-8515 Japan
AU: Nomura, A
EM: nomura@cs.shinshu-u.ac.jp
AF: Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano-shi, 380-8553 Japan
AU: Aso, T
EM: aso@nipr.ac.jp
AF: National Institute of Polar Research, Kaga 1-9-10 Itabashi, Tokyo, 173-8515 Japan
AB: The Shinshu University Sodium lidar has conducted 3-year temperature observation in Antarctica from 2000 to 2002. Coupling with simultaneous wind observation with MF/meteor radar (1999-2004) in the mesopause region, we report the wind and temperature feature concerning the Antarctic sudden stratospheric warming event in 2002. The lidar temperature from July to September in 2002 showed as much as 20K higher than those of previous two years. In the corresponding period, eastward wind at 80 km (104 km) in 2002 was close to zero (+10 m/s) though the winds of previous years shows +20 m/s (2-3 m/s). Northward wind in 2002 showed +5 m/s at 80 km and -10 m/s at 104 km, though the corresponidng wind velocities were -5 m/s and +2-3 m/s in previous years. The downward propagation of temperature drop was observed in August with the velocity of 1 km/day.
DE: 0342 Middle atmosphere: energy deposition (3334)
DE: 0350 Pressure, density, and temperature
DE: 3332 Mesospheric dynamics
DE: 3334 Middle atmosphere dynamics (0341, 0342)
DE: 3349 Polar meteorology
SC: SPA-Aeronomy [SA]
MN: Fall Meeting 2005