BAFU Ozone PM Trends

• The average adjusted yearly PM10 trends from 1991-1998 (total 13 stations in Switzerland) for rural, urban background and urban street stations were − 0.37, − 0.53 and − 1.2 µg m−3yr−1 respectively. The adjusted yearly trends for all stations range from − 0.15 µg m−3yr−1 to − 1.2 µg m−3yr−1 or − 1.2%yr −1 to −3.3% yr−1 (Barmpadimos et al., 2011a).

• Most important meteorological influences on PM10 were found to be wind gust, temperature, precipitation and boundary layer depth (Barmpadimos et al., 2011a).

• Ambient concentrations of PMcoarse (PM10-PM2.5) at 7 Swiss stations are higher on weekdays than on Sundays by a factor of 1.53 on average over all urban and suburban sites and by a factor of 1.32 on average over all rural sites (Barmpadimos et al., 2011b)

• The weekend effect is stronger PMcoarse than form PM2.5: The relative increase of coarse mode ambient concentrations on weekdays compared to Sundays was larger than the relative increase of PM2.5 concentrations by a factor of 2.7 on average over all urban and suburban sites, whereas no considerable difference was found at the rural sites (Barmpadimos et al., 2011b).

• The contribution of traffic to coarse mode urban ambient concentrations was estimated to be 53% (34%-78%)on Sundays and 70% (57%-86%) on weekdays (Barmpadimos et al., 2011b).

Journal Articles

Thesis