In the frame of this work, the sensitivity of a grid-based photochemical model on the emission inventory is examined. More precisely, the role of various emission categories on simulated oxidant formation is investigated and especially the biogenic ones. Special emphasis is given on the investigation of the role of the biogenic emissions on tropospheric ozone formation over areas with significant anthropogenic sources. The area of interest is the SE part of the Greek Peninsula where there are various types of anthropogenic pollutant sources and important biogenic sources from forest areas. Ozone air quality simulations were performed using the combined system of the atmospheric model RAMS and the photochemical model UAM. The simulations revealed that there is a significant increase of the calculated ozone concentrations over areas with significant precursor sources when biogenic emissions are taken into account. This increase is more pronounced during the days with a significant regional scale transport.
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