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UP: Fachverband Umweltphysik

UP 5: Postersession

UP 5.21: Poster

Tuesday, March 14, 2017, 16:40–18:10, GW2 B3010

Atmospheric gravity waves activity in the polar mesopause region based on PMSE observations — •Nikoloz Gudadze, Jorge L. Chau, and Gunter Stober — Leibniz Institute of atmospheric physics at Rostock university, 18225 Kühlungsborn, Germany

Atmospheric gravity waves (AGW) has important influence on mesosphere-lower thermosphere dynamics. It assumed that the part of the Atmospheric gravity waves breaks and/or dissipates in the mesopause region. Continuous Observations of the polar summer mesosphere with the Middle Atmosphere Alomar Radar System (MAARSY) have been used to investigate dynamical structures of well-known phenomenon - Polar esosphere Summer Echoes (PMSE), an important tracer in the summer polar mesopause region. We use Signal to Noise Ratio (SNR) and Doppler radial velocity from the PMSEs to investigate the wave-like motions with periods larger than 5 minutes. Such oscillations are studied in terms of atmospheric gravity waves (AGWs). Analysis shows dominance of wave-like oscillations with periods close to 15 minute in the range of short-period wave activity. PMSE layering, which could also connected with AGWs, is studied in connection with the background conditions of the neutral atmosphere. Background winds are obtained from collocated meteor radar (MR) and also based on PMSE radial velocities observed during multi-beam experiments. Local enhancement method is used for the processing of altitude-time SNR images to detect and characterized layers in the PMSEs.