Accession Number : AD0758758

Title :   Global Distribution of Thermosperic Heat Sources: EUV Sbsorption and Joule Dissipation,

Descriptive Note : Rept. for Sep-Dec 72,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Ching,Barbara K. ; Chiu,Yam T.

Report Date : 01 MAR 1973

Pagination or Media Count : 38

Abstract : The global distribution and temporal variations of thermospheric heating due to Joule dissipation of measured ionospheric electric fields are computed. It is shown that the volume Joule dissipation rate is similar in magnitude and altitudinal profile to the global solar EUV absorption rate discussed in the previous papers. Thus, Joule dissipation contributes significantly towards reconciling the quantitatively known sources of thermospheric heat input and that required to maintain the normal thermosphere. The combined heat source due to EUV absorption and Joule dissipation varies with the annual cycle in a manner closely resembling that of the thermospheric density. (Author)

Descriptors :   (*UPPER ATMOSPHERE, HEATING), IONOSPHERE, ELECTRIC FIELDS, SOLAR RADIATION, ULTRAVIOLET RADIATION

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE