Spatiotemporal variability of submicrometer particle number size distributions in an air quality management district

First measurements of ambient 10–1000nm particle number concentrations (NTOT) and size distributions were made at an urban, coastal, mountain and downwind site within the Central Taiwan Air Quality Management District during a cold and a warm period. The primary objectives were to characterize the spatial and temporal variability of the size-fractionated submicrometer particles and their relationships with copollutants and meteorological parameters. The results show that the ultrafine particles (