By Carlos Borrego, Guy Schayes

This quantity comprises the papers and poster abstracts provided on the twenty fifth NATO/CCMS overseas Technical assembly on pollution Modelling and Its software held in Louvain-la-Neuve, Belgium, in the course of 15-19 October 2001. This ITM used to be together geared up by means of the collage of Aveiro, Portugal (Pilot kingdom) and by way of the Catholic college of Louvain, Belgium (host country).The major issues of this ITM have been : function of Atmospheric types in pollution coverage and Abatement recommendations; built-in local Modelling; worldwide and Long-Range shipping; local pollution and weather; New advancements; and version review and Verification. Invited papers have been awarded via A. Ebel of Germany (Changing atmospheric surroundings, altering views); H. ApSimon of significant Britain (Applying probability review strategies to pollution modelling & abatement strategies); and S.E. Gryning of Denmark (Aspects of meteorological pre-processing of fluxes over inhomogeneous terrain) - all of that are integrated during this accomplished court cases quantity.

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Projects on which this study is based were financially supported by the Ministries of Research of the FRG and the State NRW (BMBF, MWF), the Umweltbundesamt (UBA), Berlin, and the Environmental Agency of NRW (LUA). Data have been provided by the University of Stuttgart (IER), EMEP, UBA and LUA (emissions) and the ECMWF (meteorology) via the German Weather Service (DWD). 8. , Ziegenbein, C. , 1995, The parameterization of the sulfate–nitrate–ammonia aerosol system in the long–range transport model EURAD, Meteor.

100 hPa is usually chosen as the upper boundary. It has been extended to 10 hPa for simulations including the tropopause region. g. , 1995). In the context of this paper it is more interesting and adequate to review some basic considerations governing the model design. The basic philosophy of the design of the EURAD system was that it should be an as complete as possible numerical representation of the environmental system on a regional scale. The EURAD project followed the idea of Earth system analysis (Schellnhuber and Wenzel, 1998) for its atmospheric compartment before this term was coined by modern geoscience.

HALENKA In context of the models complexity and their “perfection”, could you estimate the impact of uncertainty in emission on the results of the modelling ? A. EBEL A large number of studies regarding the role of accuracy of emission estimates for the performance of air quality models can be found in the literature. The results differ in dependence of the scenarios investigated and vary with the chemical species used to evaluate the sensitivity of models to emission uncertainties. For instance, a comprehensive study employing the EURAD model system was recently conducted by B.

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