Accession Number : AD0715930
Title : Gravity Wave Interaction with a Transiently Heated Atmosphere.
Descriptive Note : Rept. for Aug 69-Feb 70,
Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
Personal Author(s) : Chiu,Yam T.
Report Date : 15 NOV 1970
Pagination or Media Count : 37
Abstract : The report investigates the propagation of internal atmosphere gravity waves in an atmosphere driven into vertical motion by transient heating related to geomagnetic storms. It is shown that wave amplification exists and favors the observation of large amplitude waves near the Brunt-Vaisala period (approx 1000-2000 sec) in the thermosphere during active times. Besides such local frequency selection, the existence of wave-energy enhancement implies that gravity waves not only contribute to the maintenance of the static upper atmosphere but also serve as a means of rapid energy transport from pole to equator during geomagnetically active times. A model of upper atmospheric response to transient heating is proposed and it is shown that the inclusion of these waves leads to an apparent increase in the dynamic heat diffusivity. (Author)
Descriptors : (*UPPER ATMOSPHERE, WAVE PROPAGATION), GRAVITY, DIFFUSION, MATHEMATICAL MODELS, HEAT TRANSFER, MAGNETIC STORMS, HEATING
Subject Categories : Atmospheric Physics
Distribution Statement : APPROVED FOR PUBLIC RELEASE