Longitudinal MLT wind structure at higher mid-latitudes as seen by meteor radars at central and Eastern Europe (13°E/49°E). Issue 10 (15th May 2019)

• Record Type: Journal Article
• Authors: Korotyshkin, Dmitriy; Merzlyakov, Eugeny; Jacobi, Christoph; Lilienthal, Friederike; Wu, Qian
• Is Part Of: Advances in space research. Volume 63:Issue 10(2019)
• Page Start: 3154
• Page End: 3166
• Publication Date: 2019-05-15
• Subjects: Mesosphere and lower thermosphere -- Prevailing wind -- Stationary planetary waves -- Migrating tide -- Non-migrating tides; Space sciences -- Periodicals; Astronautics -- Periodicals; Geophysics -- Periodicals; 500.505
• DOI: 10.1016/j.asr.2019.01.036
• Languages: English
• ISSNs: 0273-1177

Abstract

Highlights: MLT winds measured by SKiYMET radars at Collm (51°N, 13°E) and Kazan (56°N, 49°E). Regular seasonal changes in the difference between the wind parameters are observed. SPWs make a significant contribution to mean winds mostly in winter. Non-migrating tides considerably contribute to the difference between SDT winds. 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.