The Global Distribution of Secondary Particulate Matter in a 3-D Lagrangian Chemistry Transport Model |
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| Authors: | R G Derwent W J Collins M E Jenkin C E Johnson D S Stevenson |
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| Institution: | (1) Climate Research Division, Meteorological Office, Room 156, London Road, Berkshire, RG12 2SZ Bracknell, U.K.;(2) Meteorological Office, Hadley Centre, Bracknell, U.K;(3) Imperial College of Science Technology and Medicine, Silwood Park, Ascot, U.K;(4) Department of Meteorology, University of Edinburgh, Edinburgh, U.K |
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| Abstract: | A global 3-D Lagrangian chemistry-transport model STOCHEM is used to describe the tropospheric distributions of four components of the secondary atmospheric aerosol: nitrate, sulphate, ammonium and organic compounds. The model describes the detailed chemistry of the formation of the acid precursors from the oxidation of SO2, DMS, NOx, NH3 and terpenes and their uptake into the aerosol. Model results are compared in some detail with the available surface observations. Comparisons are made between the global budgets and burdens found in other modelling studies. The global distributions of the total mass of secondary aerosols have been estimated for the pre-industrial, present day and 2030 emissions and large changes have been estimated in the mass fractions of the different secondary aerosol components. |
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| Keywords: | global model three-dimensional Lagrangian secondary aerosol sulphate aerosol nitrate aerosol ammonium aerosol secondary organic aerosol |
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