황사기간도안 제주, 고산지역에서 호흡성 분진의 입자 분포 특성

Characteristics According to the Size Distributions of Respirable Particulate During Yellow Sand Episode in Kosan, Jeju Island

This study was intended as an investigation of characteristics of background site atmospheric respirable particulate matters(RPM), and fine particles(<2.5 {\mu}{\textrm}{m}). The particle size distributions during the phenomenon of Yellow Sand(YS) occurs from April, 2001. Atmospheric aerosol particulate matter was directly collected on the Jeju island between 1 to 30, April, 2001 using an eight-stage cascade impacter(particle size range: 0.43-11 {\mu}{\textrm}{m}), and cyclone separator(cut size: 2.5, 10 {\mu}{\textrm}{m}). The episode of YS observed in background monitoring site, Kosan and appeared 2 times at sampling period. The mass concentrations of fine and coarse particles for YS episode were 34.2 and 59.6 μg/㎥, respectively, which were significantly increased amounts compared to 13.3 and 13.0 μg/㎥ for NonYS(NYS). Most size distributions had two peaks, one at 0.43∼.65 {\mu}{\textrm}{m} and the other at 3.3{\mu}{\textrm}{m}4.7 {\mu}{\textrm}{m}. The result of analysis of water-soluble ion component indicated that sulfate was mainly ion component, but nitrate and calcium ion was significantly increased at the YS episode.