Physics
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992angeo..10..416r&link_type=abstract
Annales Geophysicae (ISSN 0992-7689), vol. 10, no. 6, June 1992, p. 416-428.
Physics
17
Atmospheric Chemistry, Atmospheric Composition, Atmospheric Models, Bromine, Diurnal Variations, Mathematical Models, Ozone, Photochemical Reactions, Steady State
Scientific paper
A new method, well-suited to solving the system of continuity equations of minor species in the atmosphere over a diurnal cycle, is presented. The method is stable and accurate, and conserves the number of atoms. A technique is proposed to avoid negative values. Compared with the Gear (1967, 1971) scheme, the method is faster and of comparable accuracy. The resulting box model accepts any photochemical system as input and can be coupled with any multidimensional model by the on-line time-splitting method. The coupling of this model with a steady-state 1D model is presented as a first example to examine the influence of an increase of the bromine species on the ozone concentration. The maximum decrease of ozone is found to occur at 19 km, and is 9 percent, in reasonable agreement with previous calculations.
Cariolle Daniel
Pirre Michel
Ramaroson Radiela
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