『Abstract
This study deals with Particle Matter (PM) levels in the metropolitan
area of Lisbon and shows that EU directive is exceeded in a systematic
way, mainly due to the inner city traffic. Results show that it
is important to develop an epidemiological study in Lisbon to
find a possible association between PM levels, sources and morbidity.
Some important issues related with a monitor's representation
of regional, sub-regional, and local air pollution exposures to
the population in the metropolitan area are highlighted. PM2.5 and PM10 total mass concentration
measured in several places located in both centre of Lisbon and
the outskirts are quite well correlated, mainly considering that
two measuring methodologies (automatic and gravimetric) were used
and areas with different classifications (urban and sub-urban)
were analysed. However, the results imply that a source-oriented
evaluation of PM health effects needs to take into account the
uncertainty associated with spatial representativity of the species
measured at a single sampling station. Temporal correlation across
sampling stations, within relatively short separation distances,
varied considerably for some important elements (Zn, Sb, Cu, As
and Br), indicating that the precision of population exposure
estimates for specific elements can vary depending on the species.
Keywords: Aerosols; Morbidity; Sources; Sampling; Spatial representative』
1 Introduction
2 Experimental
3 Results
3.1 Limit values exceedances
3.2 PM sources
3.3 Spatial correlation between stations
4 Discussion
5 Conclusion
Acknowledgements
References