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