Accession Number : AD0778420

Title :   A Three-Dimensional Numerical Model of the Upper Atmosphere. Volume II. Steady-State Solutions for a Single-Fluid Model with a Fixed Temperature Field.

Descriptive Note : Rept. for Jul 72-Dec 73,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Straus,Joe M. ; Creekmore,Stephen P. ; Harris,Robert M. ; Ching,Barbara K. ; Chiu,Yam T.

Report Date : 15 FEB 1974

Pagination or Media Count : 87

Abstract : The report is the second in a series of volumes that describe calculations carried out with a numerical model of the thermosphere developed at The Aerospace Corporation. Calculations that deal with a single-fluid upper atmosphere of variable molecular weight are described. This molecular weight varies from about 25 amu at 120 km, characteristic of a mixture of molecular nitrogen and molecular and atomic oxygen, to about 15 amu at 500 km, characteristic of a mixture of atomic oxygen and helium. The temperature field is assumed to be a fixed input quantity taken from a phenomenological model. The horizontal and vertical wind fields and the density of the thermosphere are discussed, with particular attention given to the diurnally averaged wind fields. Comparisons are made with previous theoretical and observational investigations. (Author)

Descriptors :   *Thermosphere, *Atmosphere models, Upper atmosphere, Wind, Atmospheric temperature, Atmospheric density, Mathematical models

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE