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BAFU Ozone PM Trends

Duration: 2014-2017

Contact: Sebnem Aksoyoglu, sebnem.aksoyoglu@psi.ch

PM Trends and Variability

Duration: 2009-2012

Contact: André Prévôt, andre.prevot@psi.ch

Scope of project

Statistical analyses (e.g Generalized Additive Models) of long-term measurements using concentrations of particulate matter (PM10, PM2.5, PM1) to derive the variability of PM as a function of meteorology, season, weekday and their trends.
Trends of PM10 with (red) and without (blue) meteorological adjustment
Trends of PM10 with (red) and without (blue) meteorological adjustment

Key findings

Weekly cycle of PMcoarse in Bern
Weekly cycle of PMcoarse in Bern
  • 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).

Publications

Journal Articles

Influence of meteorology on PM10 trends and variability in Switzerland from 1991 to 2008.
Barmpadimos, I., C. Hueglin, J. Keller, S. Henne, and A. S. H. Prevot, 2011a
Atmospheric Chemistry and Physics, 11, 1813-1835.
DOI: 10.5194/acp-11-1813-2011

The weekly cycle of ambient concentrations and traffic emissions of coarse (PM(10)-PM(2.5)) atmospheric particles.
Barmpadimos, I., M. Nufer, D. C. Oderbolz, J. Keller, S. Aksoyoglu, C. Hueglin, U. Baltensperger, and A. S. H. Prevot, 2011b
Atmospheric Environment, 45, 4580-4590.
DOI: 10.1016/j.atmosenv.2011.05.068

Thesis

Trends and variability of airborne particulate matter in Switzerland and in Europe
Barmpadimos, Iakovos, November 2011

Collaborations

Laboratory for Air Pollution/Environmental Technology at Empa (Materials Science and Technology), Switzerland

Funding

This work was supported by the Federal Office for the Environment and the COST fund of the Swiss State Secretariat for Education and Research (SER-Nr. C05.0128).

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Contact

Laboratory of Atmospheric Chemistry
Secretariate
Forschungsstrasse 111
5232 Villigen PSI
Switzerland

Claudia Indlekofer

Telephone:
+41 56 310 2522
E-mail:
claudia.indlekofer@psi.ch

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