Development of an emissions data base for air pollutants from mobile sources in Portugal

A methodology to elaborate a traffic emission inventory for Portugal, particularly for urban areas, is presented. This methodology integrates bottom-up approach for area sources and top-down approach for line sources. Time dependent functions are used for temporal downscale of emission data. The described methodology was applied to the Lisbon Region, for typical Summer and Winter conditions. The obtained results were presented in a GIS support that is also a fundamental tool to convert emission data in order to be used by air quality models.