Solar Photoabsorption and Thermal Processes in the Polar Thermosphere.
Abstract
The report reviews a number of physical processes that occur in the thermosphere and significantly affect its neutral state through the deposition or loss of thermal energy and by modification of its composition. Specifically, the processes discussed are: (1) thermal heating from absorbed solar radiation in the wavelength region below 2400 A, (2) photodissociation of O2, (3) thermal heating from atomic oxygen recombination, and (4) cooling by infrared emission of atomic oxygen. Basic concepts associated with the calculation of the various processes are discussed in detail, and most recent data on relevant physical parameters are reviewed. Numerical models of the heating, dissociation, and cooling are presented on the basis of a nominal atmospheric model. Special emphasis is placed on diurnal, seasonal, and latitudinal variations. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 26, 1971
- Accession Number
- AD0735305
Entities
People
- Barbara K. Ching
- Edward L. Breig
Organizations
- The Aerospace Corporation