Influence of Local Sources and Meteorological Parameters on the Spatial and Temporal Distribution of Ultrafine Particles in Augsburg, Germany

Ultrafine particles (UFP; diameter less than 100 nm) are ubiquitous in urban air, and an acknowledged risk to human health. At the same time, little is known about immission situation at typical sites such as high-traffic roads, residential areas with a high amount of solid fuels for home heating or commercial industrial due missing legal requirements measurements UFP. Therefore, UFP were measured evaluated (sub-)urban background well on spots influenced by these various anthropogenic local sources city Augsburg, Germany, year 2017. In particular, spatial temporal correlations concentrations between seven measurement sites, quantification valuation contribution emitters regard their diurnal, weekly seasonal variations influence meteorological conditions formation dispersion investigated. Our analysis results demonstrate that show pronounced variability. The mean concentration level varies below 8,000 ultrafine particles/cm 3 suburban site above 16,700 station located next busy street canyon. this particularly traffic-exposed station, maximum over 50,000 measured. additional load caused intensive traffic volume during evening rush hour connection unfavourable exchange processes canyon can be quantified 14,000 average (compared background). An aggravating effect brought inversion weather air-polluted easterly winds, low wind speeds, lack precipitation very mixing layer heights, Augsburg end January 2017, cause peak