The monitoring data from the network have to be transmitted in accordance with the
FWD, Article 4 (1) and the data will be published in accordance with Article 4 (2).
The Directive also states that air quality shall be evaluated for the total zone of the
Member State in accordance with Article 6. The quality and spatial representativity of
monitoring sites and data should be reported. Good documentation of monitoring
procedures and sites are necessary.
The three different types of monitoring stations are representative for different zones.
The rural background stations with long averaging time are representative for large
zones and it is possible to report any exceedances for large areas, typically several
hundreds of square kilometres.
The urban background stations are representative for parts of the urban zone. The
zone of representativity can be estimated by model calculations or indicative
measurements by diffusive sampling. The data shall be reported with a defined zone
of expected exceedances.
The urban traffic stations in the street environment are representative for the site of the
street, but the measured data can be generalised to the entire street by street pollution
models. In other streets the concentrations of NO2 can be estimated by street models
based on traffic data, meteorological data and the street geometry. The data should if
possible be generalised and could be reported for the entire urban zone as km of street
with exceedances. It is not possible in this working group to work out in detail the
models to be used for this purpose, but it is recommended to establish a small expert
group in co-operation with the Topic Centre, for preparation of a detailed operational
street pollution model based on the existing street models.
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castellano: DISPER CUSTIC DESCAR RADIA italiano:
deutsch: DIS CUS DES RAD
castellano: DIS CUS DES RAD english: DIS CUS DES RAD
português: DIS CUS DES RAD italiano: DIS CUS DES RAD
français: DIS CUS DES RAD