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Aerosol distribution over Europe: a model evaluation study with detailed aerosol microphysics

Langmann B, Varghese S, Marmer E, Vignati E, Wilson J, Stier P, O'Dowd C...(+7 more)

Atmospheric Chemistry and Physics, vol. 8, issue 6 (2008) pp. 1591-1607

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This paper summarizes an evaluation of model simulations with a regional scale atmospheric climate- chemistry/aerosol model called REMOTE, which has been extended by a microphysical aerosol module. Model results over Europe are presented and compared with available mea- surements in surface air focusing on the European distribu- tion and variability of primary and secondary aerosols. Ad- ditionally, model results obtained with detailed aerosol mi- crophysics are compared to those based on an aerosol bulk mass approach revealing the impact of dry deposition fluxes on atmospheric burden concentration. An improved determi- nation of elevated ozone and sulfate concentrations could be achieved by considering a diurnal cycle in the anthropogenic emission fluxes. Deviation between modelled and measured organic carbon concentrations can be mainly explained by missing formation of secondary organic aerosols and defi- ciencies in emission data. Changing residential heating prac- tices in Europe, where the use of wood is no longer restricted to rural areas, need to be considered in emission inventories as well as vegetation fire emissions which present a dominant source of organic carbon.

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