Wind shifts in the Earth’s atmosphere over powerful hurricanes

1Pilipenko, SG, 1Kozak, LV
1Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
Kosm. nauka tehnol. 2012, 18 ;(6):43–50
Section: Space and Atmospheric Physics
Publication Language: Russian
We consider changes of the zonal and meridional components of wind velocity at the mesosphere altitudes over areas of powerful weather formations — cyclones and anticyclones. Satellite limb measurements of the spacecraft UARS are used for the analysis. The change and rotation of wind velocity vector after the hurricane occurrence at altitudes of 100 km are obtained. These changes in the atmosphere dynamics can be attributed to the propagation of atmospheric gravity waves (AGW) in the non-isothermal windless atmosphere with consideration for viscosity and thermal conductivity. It is found that the determining factor of the wave attenuation and expansion is the gradient of the uniform atmosphere height (temperature) on height. The satellite measurement results are in good agreement with the numerical calculations of changes in the Earth’s upper atmosphere parameters as a result of the AGW propagation
Keywords: atmospheric gravity waves, cyclones, satellite measurements, wind velocity after the hurricane
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