Accession Number : AD0775752

Title :   Developmental Studies of the Hydrogen-Nitrogen-Oxygen Systems.

Descriptive Note : Final rept. 1 May 70-30 sep 73,


Personal Author(s) : Moore,William M. ; Eccles,Thomas K.

Report Date : 31 JAN 1974

Pagination or Media Count : 135

Abstract : A COMPUTER MODEL HAS BEEN DEVELOPED WHICH CAN PREDICT THE CHEMISTRY AND PHOTOCHEMISTRY OF THE ATMOSPHERE IN THE REGIONS OF THE UPPER STRATOSPHERE, MESOPHERE, AND LOWER THERMOSPHERE. The solar flux is calculated as a function of the sun's position with respect to any altitude above any coordinate point in the northern hemisphere. This means that the time dependent chemistry of the twilight periods can be treated in detail. the temperature altitude profiles are matched for seasonal and latitudinal changes. the chemical reaction set can be quickly changed, and laboratory problems can be treated by turning off the solar flux routines. the numerical integration method is new, rapid, and inherently conserves mass. A stiff equation technique is used to increase the time increment during steady-state conditions. The current model can be used to predict events that can be correlated with rocket observations, or other atmospheric measurements. (Modified author abstract)

Descriptors :   *Computerized simulation, *Aeronomy, *Atmospheric chemistry, Mesosphere, Solar radiation, Metastable state, Chemical reactions, Photochemical reactions, Oxygen, Nitrogen, Thermosphere, Upper atmosphere, Stratosphere, Reaction kinetics, Computer programs, Variations, Diurnal variations, Hydrogen

Subject Categories : Atmospheric Physics
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE