Acoustic and gravity components of wave disturbances in the high-latitude thermosphere

1Fedorenko, AK
1Space Research Institute of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine, Kyiv, Ukraine
Kosm. nauka tehnol. 2013, 19 ;(3):27–36
Publication Language: Russian

The contribution of the pressure gradient (acoustic component) and gravity (gravity component) to the wave variations of parameters of high-latitude thermosphere was investigated with the use of measurements from the low-orbit satellite Dynamic Explorer 2. It was found that the wave disturbances which are systematically dominated in the polar region at altitudes of 250—400 km have acoustic and gravitational components with close magnitude and spectral characteristics. The obtained ratio of acoustic and gravitational parts reveals a peculiar energy balance of these waves.

Keywords: high-latitude thermosphere, wave variations of parameters
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