국내기사
제주도 고산지역 대기 라돈과 미세먼지 농도의 변동 특성 : 2016~2020년 측정 = Concentration variability of atmospheric radon and particulate matter at Gosan site in Jeju Island during 2016-2020
제주도 고산지역 대기 라돈과 미세먼지 농도의 변동 특성 : 2016~2020년 측정 = Concentration Variability of Atmospheric Radon and Particulate Matter at Gosan Site in Jeju Island during 2016-2020 / 송정민 ; 양효선 ; 김원형 ; 강창희 ; S. Chambers 1
Abstract 1
1. 서론 1
2. 연구 방법 3
2.1. 대기 라돈 모니터링 3
2.2. 역궤적 분석 4
3. 결과 및 고찰 4
3.1. 고산지역 대기 라돈 농도 4
3.2. 대기 라돈 시계열 변동 특성 5
3.3. 기류 이동경로별 농도 비교 7
3.4. 대기 라돈과 PM₁₀ 농도 변화 9
4. 결론 9
References 10
Authors Information 12
초록보기
In this study, based on the results of real-time monitoring of 222Rn at the Gosan site in Jeju Island, Korea from 2016 to 2020, its background concentration and time series fluctuation characteristics were investigated. In addition, by comparing the variations of ambient radon and fine particle concentrations according to the inflow path of airflow, the possibility of using radon tracer to understand the long-range transport of air pollutants was estimated. The daily-mean concentration of atmospheric radon was 2,507 mBq m-3. On monthly variations, the mean concentration of radon in November was 3,229 mBq m-3, the highest as almost twice as that in July (1,650 mBq m-3). The cyclic seasonality showed to be the maximum in winter and the minimum at summer with 1.5 times difference, that was consistent with the reduction in continental fetch going to summer. On the diurnal variations, the radon concentration has increased during the nighttime with the maximum (2,871 mBq m-3) around 6 a.m., and then gradually decreased throughout the daytime with the minimum (2,051 mBq m-3) around 3 p.m. During the winter season, radon’s daily variations showed relatively small fluctuations due to little change in atmospheric mixing depth. By contrast, a large amplitude was observed in summer due to a relatively large variability in mixing depth. On the cluster back-trajectories of air masses, the radon concentrations from China continent were as about twice as high mostly than those from the North Pacific Ocean. Interestingly, the high PM10 concentration was found as the high radon concentrations.