Longitudinal MLT wind structure at higher mid-latitudes as seen by meteor radars at central and Eastern Europe (13°E/49°E) |
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| Authors: | Dmitriy Korotyshkin Eugeny Merzlyakov Christoph Jacobi Friederike Lilienthal Qian Wu |
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| Institution: | 1. Kazan (Volga Region) Federal University, Kazan, Russia;2. Institute for Experimental Meteorology, Obninsk, Russia;3. Institute for Meteorology, Universität Leipzig, Leipzig, Germany;4. High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO, USA |
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| Abstract: | The mid-latitude mesosphere and lower thermosphere (MLT) wind speeds measured by two SKiYMET meteor radars (MRs) at Collm (51°N, 13°E) and Kazan (56°N, 49°E) during 2016–2017 were analyzed to study longitudinal wind structures. The differences between monthly mean prevailing wind speeds and tidal amplitudes were compared with the corresponding differences obtained from TIMED/TIDI satellite winds and gradient wind speeds from the AURA/MLS instrument. It is shown that the MR wind difference between the two sites is statistically significant. The difference of the horizontal prevailing winds can be explained by a superposition of the background zonal flow, which is different at the two latitudes, with stationary planetary waves of different origin. Non-migrating tides contribute significantly to the difference of the semidiurnal tidal winds between the two sites. |
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| Keywords: | Mesosphere and lower thermosphere Prevailing wind Stationary planetary waves Migrating tide Non-migrating tides |
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