An analysis of propagation and dissipation of atmosphere gravity waves

1Pylypenko, SG, 1Kozak, LV
1Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
Kosm. nauka tehnol. 2010, 16 ;(4):22-29
Publication Language: Ukrainian
We consider the propagation of atmosphere gravity waves in non-isothermal windless atmosphere with regard to the viscosity and heat conductivity. It is determined that the maximum for the atmosphere gravity waves amplitude corresponds to altitudes of near 90 km (mesopause) for the considered characteristics. The vertical temperature gradient is found to be the main factor of the wave spread and dissipation. The coefficients of viscosity and heat conductivity have a weak influence on the wave amplitude. Our theoretical calculations for temperature changes at the mesopause altitudes are compared with the temperature changes over the storms Wilma, Haitang, and Katrina which were obtained from an analysis of measurements of the satellite TIMED.
Keywords: gravity waves, heat conductivity, viscosity
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