A two-dimensional photochemical model of the stratosphere with Rayleigh scattering |
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| Authors: | Guido Visconti Gianni Pitari Derek Cunnold |
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| Institution: | (1) Istituto di Fisica, Universita dell' Aquila, L'Aquila, Italy;(2) Department of Meteorology, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA |
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| Abstract: | Computations of concentrations of minor stratospheric gases using a two-dimensional model of the stratosphere are reported. The model includes Rayleigh scattering. This results in an increase in the photodissociation rate computation time by a factor of 1.5. The effect of ground albedo is assessed by comparing our results with a calculation of photolysis rates for a constant albedo with latitude. Comparison of results with a reference model including only molecular absorption are also made. The largest differences ( 50%) occur in NO and OH. An approximate expression for including the effects of Rayleigh scattering and surface reflectance in multi-dimensional models is suggested. |
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| Keywords: | Multiple scattering Ozone photochemistry Trace substances Two-dimensional model |
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