HR: 1340h
AN: SA53A-1146    [Abstracts]
TI: First Measurements of Gravity Wave Momentum Fluxes With the Weber Sodium Lidar at ALOMAR in Northern Norway
AU: * Williams, B P
EM: biff@cora.nwra.com
AF: Colorado Research Associates, a division of Northwest Research Associates, 3380 Mitchell Lane, Boulder, CO 80301 United States
AU: Fritts, D C
EM: dave@cora.nwra.com
AF: Colorado Research Associates, a division of Northwest Research Associates, 3380 Mitchell Lane, Boulder, CO 80301 United States
AU: She, C Y
EM: joeshe@lamar.colostate.edu
AF: Department of Physics, Colorado State University, Colorado State University, Fort Collins, CO 80527 United States
AB: The zonal momentum flux divergence in the mesosphere and lower thermosphere region is an important driver of the meridional circulation and temperature structure, but measuring the flux requires higher temporal resolution than most radars and lidars can obtain. The Weber sodium lidar has been making wind and temperature measurements at ALOMAR, Norway since Aug 2000, including zonal momentum flux measurements during the winter in 2002 and 2004. The number of measurements has been limited by weather, transmitter reliability, and receiver efficiency. The transmitter is now stable and the ALOMAR 1.8m telescopes are being upgraded in September 2005 to gain a factor of 2-3 in signal. This should allow momentum flux measurements on any clear night. We will present the momentum flux results from 2002 and 2004 and from an upcoming October 2005 campaign.
DE: 0342 Middle atmosphere: energy deposition (3334)
DE: 3332 Mesospheric dynamics
DE: 3369 Thermospheric dynamics (0358)
DE: 3384 Acoustic-gravity waves
SC: SPA-Aeronomy [SA]
MN: Fall Meeting 2005