Simulated Summertime Regional Ground-Level Ozone Concentrations over Greece
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Ground-level ozone concentrations were estimated for Greece during a summer period of the year 2000 using the regional air quality model UAM-V off-line coupled with the mesoscale meteorological model MM5. An anthropogenic NOx, NMVOCs and CO emission inventory and biogenic NMVOCs emission data were used to support model simulations. The evaluation analysis indicates a quite satisfactory model performance in reproducing ozone levels. The simulated mean ozone concentrations are above the 32-ppb EU phytotoxicity limit over almost all continental and maritime areas of Greece. Over the greater part of the country, the background mean ozone levels range from 40 to 55 ppb. Ozone values higher than the 55-ppb EU human health protection limit reaching 60 ppb dominate part of the southern Aegean Sea that is influenced by the Athens urban plume. In the areas where anthropogenic emission densities are high, the mean ozone levels vary between 20 and 40 ppb. Over the greater part of Greece, the simulated mean daily maximum ozone concentrations range from 50 to 65 ppb. More enhanced maximum ozone concentrations up to 95 ppb mainly dominate over the greater areas of the two largest Greek urban centres (Athens and Thessaloniki) and over the continental and maritime areas south of Athens which are under the influence of the urban plume.
KeywordsAir quality modelling Ozone Greece
The research study was financed by the European Commission (6th Framework Programme, Priority: 1.4.2 SPACE/GMES, Priority Title: Priority 4: Aeronautics and Space, Call Identifier FP6-2003-SPACE-1, OJ REFERENCE OJ C303 of 13.12.2003, Research project ‘‘Global and regional Earth-system Monitoring using Satellite and in-situ data’’, contract no.: 516099) and by the General Secretariat for Research and Technology of the Ministry of Development of Greece (3RD Community Support Framework (2000–2006), Operational Program «Competitiveness» (ΕPΑΝ), Measure 4.3, Action 126.96.36.199, research project ‘‘Impact of the meteorological parameters on the gaseous pollutants transport in the atmosphere’’). We would like to thank Dr N. Mihalopoulos for the maintenance of the ozone data of the monitoring site in Finokalia and for his helpful comments.
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