Bibliographic Details
| Title: |
Latitude variability of acoustic-gravity waves in the upper atmosphere based on satellite data. |
| Authors: |
Fedorenko, A.1 aurora28@i.ua, Bespalova, A.1 bez.anna@mail.ru, Zhuk, I.1, Kryuchkov, E.1 zhukigor@gmail.com |
| Source: |
Geomagnetism & Aeronomy. Jul2017, Vol. 57 Issue 4, p471-481. 11p. |
| Subject Terms: |
*Gravity waves, *Sound waves, *Upper atmosphere, *Thermosphere, *Equatorial satellites |
| Abstract: |
Based on satellite measurements, we investigated the properties of acoustic-gravity waves in different geographical areas of the Earth's upper atmosphere. To study wave activity at high latitudes, we used the concentration of neutral particles measured by the low-altitude polar satellite Dynamic Explorer 2 and measurements from the equatorial satellite Atmosphere Explorer-E for analysis of waves at low latitudes. In the range of heights 250-400 km, there are observed latitudinal variations of amplitudes, together with variations in the morphological and spectral properties of acoustic-gravity waves. In the polar regions of thermosphere, the wave amplitudes amount to 3-10% in terms of relative variations of density and do not exceed 3% at low and middle latitudes. At low latitudes, regular fluctuations induced by the solar terminator are clearly seen with a predominant wave mode moving synchronously with terminator. Moreover, at low and middle latitudes, there are observed sporadic local wave packets of small amplitudes (1-2%) that can have origins of various natures. We also investigated the relation between some of the observed wave trains and the earthquakes. [ABSTRACT FROM AUTHOR] |
| Database: |
Energy & Power Source |
