Page 54 - Contributed Paper Session (CPS) - Volume 8

CPS2179 Giuliana Passamani et al.
for two monitoring sites, Trento PSC and Piana Rotaliana, but similar graphs
are available also for the other sites.
In Fig. 1 and Fig. 2 we represent with a thick line the estimated common
dynamic factor. In the same graph we can observe the standardized
measurements of the three pollutants whose linear combination, together
with the weather conditions, determine the pollution indicator. Given the
differences in the order of magnitude of the three pollutants, we have to use
standardized data obtained using the linear interpolation method if we want
to compare the estimated pollution indicator with the observed air pollutants.
It's rather surprising to note how the procedure has been able to summarize
pretty well, in both cases, the daily observations with a single smooth indicator.

4. Discussion and Conclusion
In Fig. 3 we represent the estimated air pollution indicators for the five
monitoring stations in one graph. As expected, the two urban monitoring sites,
Trento and Rovereto, show higher air pollution levels with respect to the other
sites. Borgo Valsugana seems to suffer from pollution less than the two urban
areas, though, according to official data recorder by APPA, it is affected by
pollution even in a worse manner than the others. APPA is the provincial
environment protection agency that collect the data on pollutants and
calculate the air quality indices in accordance with the European and national
directives. Those AQIs are then transmitted to the European Environmental
Agency that Figure 1: The estimated pollution indicator and the standardized
pollutants for Trento PSC

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