You must have a javascript-enabled browser and javacript and stylesheets must be enabled to use some of the functions on this site.


Analysis of long-range transport of aerosols for Portugal using a 3D Chemical Transport Model and OMI measurements

O. Tchepel(1), J. Ferreira(1) and C. Borrego(1)

(1) University of Aveiro, Campus Universitario de Santiago, 3810-193, Aveiro, Portugal


CESAM & Department of Environment and Planning, University of Aveiro, 3810-193 Aveiro, Portugal

Air pollution episodes characterised by higher aerosol levels are frequently caused by the long-range transport. This transboundary pollution could be related with anthropogenic as well as natural sources, such as desert dust. The use of satellite data in combination with air pollution modelling opens the challenging perspective to analyse a contribution of different pollution sources.

The prime objective of this work is the integration of satellite data into qualitative and quantitative analysis of aerosol data to assess the contribution of long-range transport to the pollution levels. For this purpose, the Chemical Transport Model CAMx with integrated Particulate Matter Source Apportioning Technologies was used. The apportionment technique tracks PMx (including secondary aerosols) formation and quantifies the contribution of boundary and initial conditions to the pollutants levels. Aerosol measurements provided by Ozone Monitoring Instrument (OMI) have been used in combination with CAMx results. Thus, the aerosol index is considered for the qualitative analysis of long-range transport of Sahara dust, and aerosol optical thickness has been used to analyse the aerosol loading. The study has been performed for Portugal for the pollution episodes observed during 2006.