Factors affecting non-tailpipe aerosol particle emissions from paved roads: On-road measurements in Stockholm, Sweden

摘要: Abstract A large fraction of urban PM 10 concentrations is due to non-exhaust traffic emissions. In this paper, a mobile measurement system has been used quantify the relative importance road particle emission and suspension accumulated dust versus direct pavement wear, tire type (studded, friction, summer), type, vehicle speed. Measurements were performed during May–September on selected roads with different pavements conditions in Stockholm region. The highest mass always observed behind studded lowest summer tire; studded-to-summer ratios 4.4–17.3 studded-to-friction 2.0–6.4. This indicates that tires lead higher emissions than friction regardless asphalt type. By comparing measurements simulator, it could be estimated wear was 0.018–0.068 dust. Likewise for road-wear 1.2–4.8 very small compared may sometimes as road. But will vary depending on, e.g. amount roads. An important dependence speed also observed. During May, at 100 km h −1 about times 20 km h . not so pronounced September, which less number size distribution by characterized clear increase coarse aerosol particles, geometric mean diameter between 3 5 μm. similar smaller concentrations. limitation presented they made using van, bigger regular cars tires. Thus, are expected different.