Theoretical model of vertical distributions of CO and CH4in the mesosphere and upper stratosphere

摘要: Carbon compounds (CO and CO2 ) methane are added to our existing computer program (Shimazaki Laird, 1970, 1972 ), which calculates diurnal variations in density distribution of pure oxygen (O (3P O (1D O2, O2(1Δg O3 hydrogen (H, OH, HO2, H2, H2O, H2O2 nitrogen (N, NO, NO2, N2O ). For the present model calculations we first modified original calculate steady state profiles for all constituents, then used these solutions as initial condition solving time-dependent equations. The effects chemical reactions vertical eddy diffusion transport on CH4 CO concentrations above 40 km, where one-dimensional treatment may not be too inappropriate, discussed. Some 15 constituents interact with chemically, is more sensitive coefficient than any other constituent. Therefore it easier determine most appropriate profile by comparing observations CH4. downward regions produced photodissociation CO2. result solution indicates that equilibrium does exist either locally or diurnally. A large maximum [OH] at 75–80 km night should modify daytime [CO] [CH4] heights.