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Global modelling of tropospheric halogens and their impacts on air quality and climate

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If you have a question about this talk, please contact Paul Griffiths .

Halogens have established impacts on the air we breathe in the troposphere, but our models of air-quality and climate models do not consider them. Known impacts of halogens include destruction of ozone, a key climate and air-quality gas, and perturbation of HOx (OH+HO2) and NOx (NO+NO2) families. Over the past few years many new observations and new tropospheric halogen sources have been reported. This talk will describe the development of a global halogen simulation within the GEOS -Chem global chemical transport model (www.geos-chem.org) and explore the impacts on air-quality and climate. First the significant gas-phase impacts on tropospheric composition in present day are explored, then implications for pre-industrial ozone and modelled aerosol-phase iodine will be discussed.

This talk is part of the Centre for Atmospheric Science seminars, Chemistry Dept. series.

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