Accession Number : AD0725734
Title : The Rotation Rate of the Upper Atmosphere: A Nonlinear Effect.
Descriptive Note : Rept. for Jun 70-Jan 71,
Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
Personal Author(s) : Chiu,Yam T.
Report Date : 02 JUN 1971
Pagination or Media Count : 29
Abstract : In order to study the apparent super-rotation of the earth's upper atmosphere, one examines a non-linear solution to the continuity, momentum conservation and state equations of gasdynamics for the steady state motion of a gravitationally stratified, cylindrical, inviscid atmosphere under the influence of a steady state, local time dependent temperature distribution. The resultant flow field can be understood in terms of angular momentum conservation of air masses: heated, rising air decreases its rotation rate and cooled, falling air increases its rotation rate. The local-time average of the differential rotation rate may give rise to an apparent altitude dependent super-rotation. Comparison with observations is presented. (Author)
Descriptors : (*UPPER ATMOSPHERE, ROTATION), (*WIND, UPPER ATMOSPHERE), GAS FLOW, MATHEMATICAL MODELS, PARTIAL DIFFERENTIAL EQUATIONS, NUMERICAL ANALYSIS
Subject Categories : Atmospheric Physics
Distribution Statement : APPROVED FOR PUBLIC RELEASE