OZONE FORMATION IN SOUTHEAST EUROPE SIMULATED BY AN ADDVANCED QIR QUALITY MODEL

8th International Scientific Conference - SGEM2008, www.sgem.org, SGEM2008 Conference Proceedings/ ISBN: 954-918181-2, June 16-20, 2008, Vol. 1, 765-772 pp

ABSTRACT

Some studies of the MM5/CMAQ modeling system sensitivity to changes of the
emissions of ozone precursors are presented in the paper.

Tree domains were set over Europe with resolution 90-30-10 km. The most inner
domain embraces entirely Romania, Bulgaria and Greece. MM5 was run over these
domains for June 2000 with NCEP 1x1 degree Global Analysis data. MM5 was run on
the external grids in a “two-way nesting” and over the finer grid in a “one-way nesting”
mode.

EMEP inventory grid data and its 16.67 km desegregation, were used to prepare the
emission input. Proper time profiles, monthly, weekly and daily, were imposed upon
yearly values for better presentation of emission variations as recommended by EPA

Four scenarios were used for evaluate the sensitivity of the model for ozone formation:
(a) a full emission base case and three control emission scenarios: (b) of reduced NOx
(50%), (c) of reduced VOC (50%) and (d) combination NOx (50%)-VOC (25%). By
running these four scenarios the influence of the variation of emissions on ozone
formation in different geographical regions was checked. Results from comparisons
between different runs, between the basic case calculations and measurements and
between the basic case and other model results are shown and commented.

Keywords: air pollution modelling, US EPA models-3 system, ozone pollution, emission reduction scenarios, model sensitivity