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Title:
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Wijkonderzoek fijn stof Nijmegen en omgeving: interimrapport resultaten eerste fase
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Author(s):
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Published by:
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Publication date:
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ECN
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1-4-1999
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ECN report number:
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Document type:
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ECN-C--99-043
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ECN publication
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Number of pages:
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Full text:
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16
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Download PDF
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Abstract:
At eight locations in Nijmegen, Netherlands, and its direct surroundingswe measured 24 hour averages of PM10 and PM2.5 concentrations during
three months at six day intervals. The mean concentration over all stations
and measurement days was 26 mug/m3 for PM2.5 which is lower than the
mean yearly average for The Netherlands. This can be explained by an unusual
weather pattern during large parts of the measurement period. Often, no local
influence on the PM concentrations could be traced, but at some stations and
some situations a small contribution of the region could be found. In general
the most southern measurement point had the lowest concentrations. At two
points in the heart of the city sources of PM within the size range of 2.5 to
10 mum could be found during days with elevated mean concentrations. During
one day of relatively clean conditions higher concentration were found at
locations at the border of the city. Comparison of the filter measurements
with continuous RIVM (National Institute of Public Health and Environmental
Protection) TEOM measurements delivers quite good results for PM10. For
PM2.5 the agreement is also good when the TEOM data is corrected with a
rather high factor to compensate for losses during the warming of the sampled
air. 7 refs.
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