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Abstract

In order to chart in detail the distribution of NO(2) in Catania, 95 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 summer average data (46.4 µg/m{3}) and the winter average data (47.0 µg/m{3}) emphasised how there is a similar diffusion in different periods, particularly with regard to the diffusion of NO(2) in Piazza Cutelli in summer (peak level 94.9 µg/m{3}) and in winter (peak level 79 µg/m{3}). In this place, the average diffusion per year that was recorded corresponds to 87 µg/m{3}, which goes beyond the limit fixed by the directive. In fact, this limit was fixed to 83 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 17325 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
Record Number: 199711524 / Last updated on: 1997-12-09
Category: PUBLICATION
Original language: it
Available languages: it