JRC Ispra EMEP - GAW Regional Station for Atmospheric Research 2008 Report
The aim of the JRC-Ispra station for atmospheric research (45°49'N, 8°38'E) is to monitor atmospheric parameters (pollutant concentrations and fluxes, atmospheric particle chemical composition, number size distribution and optical properties) to contribute in assessing the impact of European policies on air pollution and climate change. The station has been operated continuously since November 1985, with a gap in gas phase data due to a severe breakdown of the data acquisition system in 2003 though.
The measurements performed in 2008 led to annual averages of ca. 34 µg m-3 O3, 0.7 µg m-3 SO2, 20 µg m-3 NO2 and 27 µg m-3 PM10. Carbonaceous species (organic matter plus elemental carbon) are the main constituents of PM2.5 (~57 %) followed by NH4NO3 (20-30 %) and (NH4)2SO4 (10-20 %). The data from 2008 confirmed the seasonal variations observed over the previous years, mainly driven by meteorology rather than by changes in emissions, as revealed by the lidar measurements. Aerosol physical and optical properties were also measured in 2008. The average particle number (from 10 nm to 10 µm) was about 8000 cm-3 in 2008. The mean (close to dry) aerosol single scattering albedo (0.75) was low compared to the values generally observed in Europe, which means that the cooling effect of aerosols is reduced in our region compared to others.
Long-term trends (over 20 years) show consistent decreases in sulfur concentrations and deposition, PM mass concentration (-0.9 µg m-3 yr-1), and from 2003 in ozone concentrations too. The decreasing trends in oxidised and reduced nitrogen species are much less pronounced.
GRUENING Carsten;
ADAM Mariana;
CAVALLI Fabrizia;
CAVALLI Paolo;
DELL'ACQUA Alessandro;
MARTINS DOS SANTOS Sebastiao;
PAGLIARI Valerio;
ROUX David;
PUTAUD Jean-Philippe;
2009-11-18
European Commission
JRC55382
1018-5593,
EUR 24088 EN,
https://publications.jrc.ec.europa.eu/repository/handle/JRC55382,
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