Community Research and Development Information Service - CORDIS


Frequent episodes occur in Southern Europe with high levels of toxic oxidants such and ozone and PAN. The photochemical formation of ozone and PAN in the lower atmosphere proceeds via a complex interplay of solar UV light, nitrous oxides (NOx), and volative organic compounds (VOC).

In a long term monitoring campaign during the year 2000, PAN, ozone and VOC has been studied at the Ispra Joint Research Centre. The site is situated in a semi-rural area in North Italy, at the border of the Po Valley and the Alps. As expected PAN and ozone exhibited a distinct diurnal variation driven mainly by the intensity of solar irradiation. The long-term set-up of this study allowed singling out periods with high PAN concentration. Air quality in Europe has generally improved over the last decade-mainly due to reduced traffic related emissions. The same trend is evident for PAN at the test-site. No improvement has been observed for ozone and NOx. This may seem strange, but can be attributed to the role of biogenic VOC emissions. .

Additional information

Authors: REMBGES D ET AL, JRC, Institute for Environment and Sustainability, Ispra (IT)
Bibliographic Reference: An oral report given at: A Changing Atmosphere, Torino (IT), 17-20 September 2001
Record Number: 200114011 / Last updated on: 2001-11-14
Original language: en
Available languages: en