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Abstract

In order to chart in detail the distribution of NO(2) in Palermo, 133 molecular diffusion passive sample detectors were utilised after having been installed in urban areas. The survey lasted for six months (three in winter and three in summer). The period of time was subdivided into twelve sampling periods, each of them lasting for fifteen days.

Isoconcentration maps having a 10 µg/m{3} periodicity were drawn. For this purpose, a map-making software was employed. The comparison between the maps regarding the winter average data (45.8 µg/m{3}) and the summer average data (40.1 µg/m{3}) emphasised how, to be in conformity with results obtained in other towns, there are higher average concentrations in winter than in summer. The absence of peak levels was recorded. In the urban area of Via Albanese/Via Orsini the highest average level was recorded (67.7 µg/m{3}), which however does not go beyond the limit fixed by the directive. In fact, this limit was fixed to 80 µg/m{3}. .

Additional information

Authors: GERBOLES M, JRC Ispra (IT);GALATÀ R, JRC Ispra (IT);AMANTINI L, JRC Ispra (IT);PAYRISSAT M, JRC Ispra (IT)
Bibliographic Reference: EUR 17323 IT (1997) 52pp., FS, free of charge
Availability: Available from the Public Relations and Publications Unit, JRC Ispra, I-21020 Ispra (IT), Fax: +39-332-785818
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