HR: 16:30h
AN: A32D-03    [PDF]
TI: AEROCOM : Global Aerosol Models Tested Against Surface Observations
AU: * Guibert, S
EM: guibert@lsce.saclay.cea.fr
AF: Laboratoire des Sciences du Climat et de l'Environnement, L'Orme des Merisiers, Gif-sur-Yvette CEDEX, 91191 France
AU: Schulz, M
EM: schulz@lsce.saclay.cea.fr
AF: Laboratoire des Sciences du Climat et de l'Environnement, L'Orme des Merisiers, Gif-sur-Yvette CEDEX, 91191 France
AU: Kinne, S
EM: kinne@dkrz.de
AF: Max Planck Institute for Meteorology, Bundesstrasse 55, Hamburg, 20146 Germany
AU: Textor, C
EM: textor@lsce.saclay.cea.fr
AF: Laboratoire des Sciences du Climat et de l'Environnement, L'Orme des Merisiers, Gif-sur-Yvette CEDEX, 91191 France
AB: Through the AEROCOM project, work is realized to perform a rigorous evaluation of existing global aerosol models. Part of this evaluation consists of assembling observational data-sets, in order to compare measurements and model outputs for characteristic aerosol properties. This work presents the result of such a comparison regarding the aerosol composition at selected surface sites. From several regional and global data-sets (EMEP, GAW, IMPROVE, etc), aerosol sites were chosen. This selection of ground sites is done to evaluate the aerosol composition in each region of the globe and for at least one complete year, in order to have information on the seasonal variations. The years 1996-1997-2000-2001 were chosen as reference years for the comparison exercise. These years were simulated by the different models involved in AEROCOM. The parameters concerned in this work are sulfate, black carbon, total particulate matter, dust and sea-salt concentrations. This global comparison allows one to see whether a bias between model and observations is due to large specific local gradients in the aerosol concentration fields or due to a more systematic error in the model. Results from a similar comparison performed with aerosol optical properties, in particular optical depth using the AERONET data-set, are analyzed using modeled aerosol composition.
UR: http://nansen.ipsl.jussieu.fr/AEROCOM
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0325 Evolution of the atmosphere
DE: 0365 Troposphere--composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting