Modelled concentrations by AERIS were compared against
measurements from the EMEP monitoring network (www.emep.
int) located in Spain and Portugal for year 2011 (Table 4). The
spatial coverage of the monitoring network is shown in Fig. 1, being
composed only of rural background stations whose measurements
are deemed representative of the spatial scale of AERIS (16 km).
Although this methodology has little discriminating power to understand
model behaviour, the objective of the validation practice
is determining whether AERIS is able to replicate observed values.
Comparisons were made exclusively for NO2, O3, PM2.5 and SO2 and
for the following relevant indicators: 19th highest hourly concentration
(NO2), daylight AOT40 (O3), mean annual concentration
(PM2.5) and 25th highest hourly concentration (SO2).