Author(s)

SÍLVIA COELHO, JOANA FERREIRA, VERA RODRIGUES, SANDRA RAFAEL, CARLOS BORREGO, MYRIAM LOPES

Abstract

Air pollution has become a growing concern in the past few years, with an increasing number of acute air pollution episodes in many cities worldwide. Ozone (O₃) is a powerful oxidising agent and one of the air pollutants of most concern in Europe. Source apportionment modelling provides valuable information on the contributions of different source sectors and source regions to ozone concentrations. This information can be useful in designing air quality management strategies and in understanding the potential benefits of reducing emissions from a particular source category. In the present work, the Comprehensive Air Quality Model with Extensions (CAMx), with its Ozone Source Apportionment Technology (OSAT), was applied over Amsterdam Region, Netherlands, for the period of 8^th to 12^th July 2010, when high concentration of ozone were measured in several air quality monitoring stations in the region of Amsterdam. The contributions of different source categories and the NOx/VOC limitation to the ozone formation were quantified. Results indicated a great influence of transboundary transport on the O₃ simulated concentrations. The OSAT tool revealed that this is the main factor affecting O₃ levels in the area of study, followed by VOC emissions from solvent use and NOx emissions from industry and other sources not individually analysed. O₃ formation is slightly more NOx limited than VOC limited.

Keywords

ozone, numerical modelling, source apportionment