Kemp, K., Ellermann, T., Brandt, J., Christensen, J., Ketzel, M. & Jensen, S.S., 2008: The Danish Air Quality Monitoring Programme. Annual Summary for 2007. National Environmental Research Institute, University of Aarhus. 47 pp. NERI Technical Report No. 681.
Summary
The Danish Air Quality Monitoring Programme (LMP IV) has been revised and is still under revision in accordance with the EU Frame-work Directive and the four daughter directives of SO2, NOx/NO2, PM10, lead, benzene, CO, ozone, arsenic, cadmium, mercury, nickel and polycyclic aromatic hydrocarbons. The data sets for year 2007 are almost complete for most stations. The monitoring programme consists of 11 stations.
The concentrations were in 2007 almost the same or slightly lower as in 2006. Changes may mainly be due to meteorological conditions. Two exceedances of the limit value occurred for PM10, while 1 exceedance of the limit value + plus margin of tolerance were measured for NO2.
The limit value + the margin of tolerance for the annual average of NO2 (46 µg/m3 in 2007) was exceeded in Copenhagen at the street station on H.C. Andersens Boulevard. The limit value (to be complied with in 2010) of the annual average of NO2, was in 2007 exceeded at two street stations in Copenhagen. The NO2 concentrations seem to have been almost constant during the last ten years. Model calculations at selected streets in Copenhagen and Aalborg showed that the limit value + margin of tolerance was exceeded on several streets in central Copenhagen and Aalborg.
The ozone level was in 2007 slightly lower than in 2006 at all rural and urban background stations but no clear trend is observed. The decrease in 2007 may be ascribed to the “rainy” summer of 2007. The information threshold at 180 µg/m3 was not exceeded. The target values were not exceeded, but the long-term objectives for both the max 8 hours on 120 µg/m3 and the AOT40 on 6000 µg/m3?h were exceeded at several non-traffic stations. The O3 pollution in Denmark is to a large extent caused by long distance transport of pollutants from other European countries.
The limit value for the 35th highest daily average value for PM10 (50 µg/m3) was in 2007 exceeded at 2 stations. The limit value for the annual average (40 µg/m3) was not exceeded (the margin of tolerance is = 0 from 2005). Emission in other European countries contributes significantly to the PM10 levels in Denmark.
The SO2 and lead levels have been decreasing for more than two decades and are far below the limit values. The limit values for benzene and CO are not exceeded and the levels have been decreasing for the last decade.
Measurements of the concentrations of particle bound PAH were started up in June 2007 at H.C. Andersens Boulevard, Copenhagen. The average concentration of benzo[a]pyrene was 0,32 ng/m3 for the second ½ year of 2007 and it is therefore unlikely that the target value for benzo[a] pyrene (1 ng/m3) was exceeded in 2007.
Actual data, quarterly reports, annual and multi-annual summaries are available at the website of NERI
(http://www.dmu.dk/-International/Air).
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