Abstract
accelerator. The impact of air-mass pathway on the characteristics of particulate matter was analyzed at an end point of Gyeongju with backward trajectory results obtained from the HYSPLIT model. The physico-chemical characteristics of the categorized aerosol with soil-related mineral species, anthropogenic-related heavy metal species, and aerosol-acidityrelated element were analyzed based on the air-mass pathways. The nanoparticles observed at the national park area of Gyeongju were estimated to be aected by soil-related elements when the air mass came from the western area of the Asian continent and to be predominantly aected by anthropogenic-related elements when air mass came from the northern area of the Asian continent through Korean peninsula. Soil-related elements were mainly observed in particles with sizes greater than 560 nm. The average mass fraction of anthropogenic-related elements was relatively much higher in the particle size range less than 320 nm.
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