Title: A computer code for a one-dimensional dynamic model of the mesosphere and lower thermosphere
Description: A one-dimensional computer simulation of the composition and the dynamics of the mesosphere and lower thermosphere between 50 and 400km is presented. The model is based on a numerical solution of large sets of partial differential equations for the conservation of mass and momentum for individual gases in an atmosphere with constant temperature and turbulent diffusion coefficient profiles. Incorporated into the model are 56 different neutral and ionic atmospheric species involved in 215 chemical and photochemical reactions. Distributions of many of the constituents are presented as determined from an application of the computer code to a midlatitude winter environment. Included are tables of the photodissociation rate coefficients as functions of the column densities of molecular oxygen and ozone for several of the atmospheric gases. Finally, the complete computer code is presented along with a detailed explanation of its structure and instructions for its use. Additional keywords: finite difference equations; equations of state.
Subjects: Mesosphere, Research, Computer simulation, Thermosphere, Atmospheric ionization, Mathematical models