In 2010 the annual limit
value for NO2 was exceeded at one street
in Copenhagen, and model calculations point
to a number of other exceedances. For particles
no exceedances
was observed in 2010.
In 2010 the annual limit
value for NO2 was exceeded at one street
station in Copenhagen (H.C. Andersens Boulevard),
whereas no exceedances were observed in
Odense, Aalborg and Aarhus. The NO2 concentrations
generally decreased in 2010. However, at
one station in Copenhagen an increase was
observed. This is believed to be a temporary
effect due to ongoing local construction
work at two nearby sites.
Model calculations at
selected streets in Copenhagen and Aalborg
indicate that the limit value was exceeded
at several streets in Copenhagen but not
in Aalborg in 2010. In general modelling
confirmed that the street station at H.C.
Andersens Boulevard in Copenhagen represents
one of the most polluted streets in Copenhagen,
whereas the traffic station in Aalborg represents
the average level for the 31 selected streets
in Aalborg.
Due to new traffic information
Sydhavnsgade in Copenhagen has now significant
higher NO2 concentration and is now by far
the most NO2-polluted street of the 138
selected streets in Copenhagen.
PM10 were at all the
stations below both the annual limit value.
PM2.5 was lower than
the annual limit value valid from 2015.
The number of particles
in ambient air were about 16000 particles
per cm3 at the street station H.C. Andersens
Boulevard. This is considerably higher than
in urban and rural background. A significant
reduction in particle number has been observed
since 2002.
About the report
This report presents
the result of the Danish Air Quality Monitoring
Programme in 2010. The monitoring programme
is carried out by the National Environmental
Research Institute (NERI) at Aarhus University.
The programme is based on continuous measurements
at nine monitoring stations situated in
the four largest cities and two stations
in background areas. These measurements
are supplemented with model calculations
using NERI’s air quality models.
The aim of the program
is to monitor air pollutants relevant to
human health in accordance with the EU air
quality directives. The programme includes
measurements of sulphur dioxide (SO2), nitrogen
oxides (NOx/NO2), particulate mass (PM10
and PM2.5), particle number, benzene (C6H6),
toluene (C7H8), carbon monoxide (CO), ozone
(O3), lead (Pb), arsenic (As), cadmium (Cd),
mercury (Hg), nickel (Ni), and polycyclic
aromatic hydrocarbons (PAH). In 2009 the
programme was expanded with measurements
of a number of volatile organic compounds
(VOC’s) that are precursors for formation
of ozone.
The measurements and
model calculations are used to evaluate
the Danish air quality in relation to limit
values as well as to follow trends. Further,
the program serves as basis for determination
of sources of the air pollutants, basis
for evaluation of the impact of regulations
of emissions and as basis for various research
projects related to air quality.
Contact: Senior scientist
Thomas Ellermann, NERI, tel. +45 4630 1166,
tel@dmu.dk
Ellermann, T., Nordstrøm,
C., Brandt, J., Christensen, J., Ketzel,
M. & Jensen, S.S. 2011: The Danish Air
Quality Monitoring Programme. Annual Summary
for 2010. National Environmental Research
Institute, Aarhus University. 55 pp. -NERI
Technical Report No. 836.
http://www.dmu.dk/Pub/FR836.pdf
