Non-homogeneous structure of neutral winds in the lower thermosphere during the MAC/EPSILON campaign

Physics

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Atmospheric Circulation, Middle Atmosphere, Neutral Atmospheres, Radar Measurement, Thermosphere, Gravity Waves, Inhomogeneity, Internal Waves, Radio Meteors, Temperature Gradients, Wind Profiles

Scientific paper

The paper presents the results of an investigation of the height variations of dynamic processes in the 80-110 km height region, carried out in Kazan, USSR (56 deg N, 49 deg E) by the radiometer method during the MAC/EPSILON campaign. Experimental results show that the largest values of vertical wind gradients, as well as zonal and meridional temperature gradients, can be found at heights of about 83 km. At heights of 80-100 km, energy absorption of inertiogravity waves and tides, which are the major sources of turbulent energy in this region, are observed. The energy dissipation rate was estimated to be from 0.1 to 0.4 W/kg.

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