IDŐJÁRÁS
Quarterly Journal of the Hungarian Meteorological Service
Vol. 110, No. 3–4, July–December 2006, pp. 365–377
Description and evaluation of a coupled
Eulerian transport-exchange model
Part II. Sensitivity analysis and application
Róbert Mészáros1,, István Lagzi2, Ágota Juhász1, Dalma Szinyei1, Csilla Vincze1,
András Horányi3, László Kullmann3 and Alison S. Tomlin4
1
Department of Meteorology, Eötvös Loránd University,
H-1518 Budapest, P.O. Box 32, Hungary; E-mail: mrobi@nimbus.elte.hu
2
Institute of Chemistry, Eötvös Loránd University,
H-1518 Budapest, P.O. Box 32, Hungary
3
Hungarian Meteorological Service, P.O. Box 39, H-1675 Budapest, Hungary
4
Energy and Resources Research Institute, University of Leeds, Leeds, LS2 9JT, U.K.
(Manuscript received in final form June 22, 2006)
Abstract—A detailed description of a coupled transport–deposition model has been
given in the accompanying paper in this issue (Lagzi et al., 2006). Sensitivity analysis of
this model and some applications are presented in this study. Within the framework of
sensitivity analysis, the effects of input data on model results have been examined. Some
case studies of model applications are also presented here. Using our model, the impact of
both short term accidental releases and continuous emissions of air pollutants can be
estimated. An example of long-range transport processes resulting from an accidental
release from a single concentrated emission source (nuclear power plant (NPP) at Paks,
Hungary) is discussed. Another application of the model is the prediction of secondary
pollutant loading resulting from the continuous release of pollutant precursors.
Estimations of photochemical air pollution and ozone fluxes were performed on a regular
grid over Hungary for the first time. Time and space resolutions of the transport–
deposition model correspond to the ALADIN meso-scale limited area numerical weather
prediction model used by the Hungarian Meteorological Service. Accordingly, the
meteorological data utilized in the model were generated by the ALADIN model, which
allows further routine model applications. The model simulations show that the predicted
regions of high stomatal ozone flux (the effective ozone load) can be very different to
predicted regions of high AOT 40 (accumulated ozone exposure over a threshold of 40
ppb) values depending on the weather and soil conditions. The predicted ozone deposition
velocities over various vegetation types are shown to be highly sensitive to a range of
meteorological parameters for summer, sunny conditions which affects the flux of ozone
from the atmosphere to the surface.

Corresponding author
Key-words: transport-deposition model, accidental release, photochemical air pollution, stomatal
ozone fluxes.