Ozone in the martian atmosphere: 3d photochemical modeling

Details Ozone in the martian atmosphere: 3d photochemical modeling Ozone in the martian atmosphere: 3d photochemical modeling

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....2850l&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #2850

Computer Science

Scientific paper

We have coupled a photochemical model to the general circulation model of the Mars atmosphere developed at LMD for the last 10 years. This first version of our dynamical-radiative-chemical three-dimensional model includes 11 species (H, H_2, O, O(1D), O_2, O_3, OH, HO_2, H_2O, H_2O_2, and CO), and takes into account 9 photodissociations and 28 chemical reactions. Considering the main UV absorbers (CO_2, O_2, H_2O, and O_3), transmission is calculated for every wavelengths with a resolution varying from 0.1 nm to 5 nm. The vertical profiles of the photodissociation coefficients are then tabulated for all altitudes and solar zenith angles. The chemical evolution of the tracers is calculated on-line using the temperature calculated by the GCM, takes into account the diurnal cycle, and is is interactively coupled to the water cycle. After a quick description of the photochemical model, we will present first results of the coupled model obtained after a few annual cycles. Emphasis will be put on the global seasonal cycle of oxygen species and its interaction with transport processes and the water content calculated by the GCM. The latitudinal distribution of ozone obtained in our simulations will be compared to the available observational data. This new 3D photochemical model will be used at LMD and Service d'Aéronomie for the interpretation of the data obtained by the instruments on board the Mars Express mission.

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