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Abstract

In order to chart in detail the distribution of NO(2) in Messina, 72 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 after analysing the concentration. For this purpose, map-making software was employed. The comparison between the maps regarding the winter average data (48.8 µg/m{3}) and the summer average data (41.7 µg/m{3}) emphasised how there is a similar diffusion in different periods, particularly with regard to the diffusion of NO(2) in Via Pr Mafalda/Via Fulci in summer (peak level 71.9 µg/m{3}) and in winter (peak level 64.8 µg/m{3}). In none of the places which were surveyed was recorded an average diffusion per year greater than the limit fixed by the directive. In fact, this limit was fixed to 77 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 17324 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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