제주도 고산측정소의 대기 라돈농도 시계열 변화 (Time-series Variation of Atmospheric Radon Concentrations at Gosan Site, Jeju Island)

서지정보

· 발행기관 : 한국대기환경학회
· 수록지 정보 : 한국대기환경학회지 / 29권 / 1호 / 86 ~ 96페이지
· 저자명 : 고희정, 강창희, 신승희, 허철구, 김원형, 강동훈, Scott Chambers

초록

The realtime monitoring of radon (222Rn) concentrations has been carried out from Gosan site, Jeju Island for three years of 2006~2008, in order to evaluate the background level and timely variational characteristics of atmospheric radon. The mean concentration of radon measured during the studying period was 2965 mBq/m3 with its annual mean values in the range of 2768~3124 mBq/m3. The relative ordering of the seasonal mean concentrations was seemed to vary such as winter (3578 mBq/m3)¤fall (3351 mBq/m3)¤spring (2832 mBq/m3)¤summer (2073 mBq/m3). The monthly mean concentrations were in the order of Jan¤Feb¤Oct¤Nov¤Dec¤Mar¤Sep¤Apr¤May¤Jun¤Aug¤Jul, so that the highest January value (3713 mBq/m3) exceeded almost twice as the July minimum (1946 mBq/m3). The hourly concentrations in a day showed the highest level (3356 mBq/m3) at around 7 a.m., increasing during nighttime, while reaching the lowest (2574 mBq/m3) at around 3 p.m. From the backward trajectory analysis for a continental fetch of radon, the high concentrations (10%) of radon matched with the air mass moving from the Asia continent to Jeju area. In contrast, the low concentrations (10%) of radon were generally correlated with the air mass of the North Pacific Ocean. In comparison by sectional inflow pathways of air mass, the radon concentrations were relatively high from the north China and the Korean peninsula.

영어초록

The realtime monitoring of radon (222Rn) concentrations has been carried out from Gosan site, Jeju Island for three years of 2006~2008, in order to evaluate the background level and timely variational characteristics of atmospheric radon. The mean concentration of radon measured during the studying period was 2965 mBq/m3 with its annual mean values in the range of 2768~3124 mBq/m3. The relative ordering of the seasonal mean concentrations was seemed to vary such as winter (3578 mBq/m3)¤fall (3351 mBq/m3)¤spring (2832 mBq/m3)¤summer (2073 mBq/m3). The monthly mean concentrations were in the order of Jan¤Feb¤Oct¤Nov¤Dec¤Mar¤Sep¤Apr¤May¤Jun¤Aug¤Jul, so that the highest January value (3713 mBq/m3) exceeded almost twice as the July minimum (1946 mBq/m3). The hourly concentrations in a day showed the highest level (3356 mBq/m3) at around 7 a.m., increasing during nighttime, while reaching the lowest (2574 mBq/m3) at around 3 p.m. From the backward trajectory analysis for a continental fetch of radon, the high concentrations (10%) of radon matched with the air mass moving from the Asia continent to Jeju area. In contrast, the low concentrations (10%) of radon were generally correlated with the air mass of the North Pacific Ocean. In comparison by sectional inflow pathways of air mass, the radon concentrations were relatively high from the north China and the Korean peninsula.

참고자료

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