우대광 이승복 배귀남 김태성 2024-01-20T23:01:01Z 2024-01-20T23:01:01Z 2021-09-06 2008-08 1598-7132 https://pubs.kist.re.kr/handle/201004/133260 A Transient Differential Mobility Particle Spectrometer (TR-DMPS) with a short response time was recently developed to monitor high concentration of ultrafine particles emitted from vehicles. To investigate the availability of the TR-DMPS for monitoring transient roadside aerosols, the number size distribution of ultrafine particles was monitored at the Cheongnyangni roadside in Seoul on March 23, 2007 together with a Scanning Mobility Particle Sizer (SMPS). The roadside aerosols were monitored every 5 min and 0.1 sec by using the SMPS and the TRDMPS,respectively. The concentration of ultrafine particles at the roadside was highly fluctuated for a short duration. From the comparison of particle number concentrations and size distributions between two instruments, it was confirmed that the SMPS provided fairly good time-averaged number size distribution although it did not follow rapid change of particle number concentration at the roadside. The TR-DMPS quickly responded to a rapid change of particle number concentration due to abrupt traffic flow. However, the TR-DMPS frequently showed electrical noise events, resulting in underestimated particle contamination. A more stable operation of the TR-DMPS is needed in application of roadside aerosol monitoring. Korean 한국대기환경학회 SMPS와 TR-DMPS를 이용한 도로변 초미세 입자 모니터링 결과의 비교 Comparison of Ultrafine Particles Monitored at a Roadside Using an SMPS and a TR-DMPS Article 2 한국대기환경학회지, v.24, no.4, pp.404 - 414 한국대기환경학회지 24 4 404 414 kci ART001277165 SMPS TR-DMPS Ultrafine particle Size distribution Roadside