HR: 0830h
AN: SA51A-0504    [PDF]
TI: Diurnal Variations of the Mesopause Temperature Structure by Tides and Waves as Observed by Potassium Lidar at Different Latitudes
AU: * Fricke-Begemann, C
EM: fricke-begemann@iap-kborn.de
AF: Leibniz-Institute of Atmospheric Physics, Schloss-Str. 6, K\"uhlungsborn, 18225 Germany
AU: H\"offner, J
EM: hoeffner@iap-kborn.de
AF: Leibniz-Institute of Atmospheric Physics, Schloss-Str. 6, K\"uhlungsborn, 18225 Germany
AB: Investigating the diurnal temperature structure of the mesopause region (80--105 km) requires continuous measurements over complete 24-h cycles. The Leibniz-Institute of Atmospheric Physics operates two potassium temperature lidars which have been upgrade since 2000 for daytime observations. Measurements have been carried out at various locations at low (28$^\circ$N), mid (54$^\circ$N) and high latitudes (78$^\circ$N). Decomposition of the serial temperature profiles into diurnal and higher harmonics allows the determination of tidal amplitudes and phases. Regularly, dominate semi-diurnal components with amplitudes of 10 K and more are observed. Single campaigns with continuous lidar measurements of more than 100 hours provide a reliable data base to study the influence of gravity and planetary waves on the mesopause temperature structure.
DE: 0350 Pressure, density, and temperature
DE: 3360 Remote sensing
DE: 3384 Waves and tides
SC: SPA - Aeronomy [SA]
MN: 2003 Fall Meeting