04 - Air Quality at Your Street - Public Digital Map of Air Quality in Denmark

A digital map of air quality of annual concentrations of NO 2 , PM 2.5 and PM 10 in 2012 has for the first time been presented on the internet for all 2.4 million addresses in Denmark. The air quality data have been generated on basis of a multi-scale air quality modelling approach, consisting of a suite of chemistry-transport models all developed at Aarhus University and including regional modelling, urban background modelling and street modelling. Information about traffic volumes is based on a newly developed Danish National Passenger Model, and national travel speed data have been obtained from a recent dataset based on GPS readings of vehicles. Air quality model results are validated by comparisons with measurements obtained from the fixed site monitoring stations under the Danish Air Quality Monitoring Programme. In general, the comparison indicates that predicted street concentrations give a fairly accurate picture of air quality at addresses, its geographic variation and the relative differences between areas. The target group for the air quality map is the general Danish population and aiming for providing information and awareness about air quality. Other target groups include local and national authorities and consultants whom may use the information as a screening tool for air quality assessment. The user interface of the air quality map is based on WebGIS and is available in Danish and English at http://luftenpaadinvej.au.dk.