| 저자(한글) |
장광미,이호근,서명석,박경윤,강창희,허철구,심상규,시스템공학연구소 지구환경정보연구부,시스템공학연구소 지구환경정보연구부,시스템공학연구소 지구환경정보연구부,시스템공학연구소 지구환경정보연구부,제주대학교 화학과,제주대학교 화학과,한국과학기술연구원 환경연구센터 |
| 초록 |
A set of 1994 data was analyzed to investigate the characteristics of background surface SO$_{2}$ concentrations at Kosan, Cheju Island, Korea. The SO$_{2}$ concentrations at Kosan site show a seasonal variation with a minimum(0.46 ppb) in summer, maximum(1.02 ppb) in spring and an annual mean of 0.83 ppb. These values were 4-7 times higher than those measured in other remote areas, such as Bermuda and Oki Island, but they were similar to the baseline concentrations of other sites in the world. The diurnal variation of SO$_{2}$ concentrations was very small and it shows a peak at 10 am in spring and fall, 2 pm in summer, and 1 pm in winter, respectively. Correlations between local meteorological parameters and SO$_{2}$ concentrations were mot significant. This suggests that the variations of the Kosan's SO$_{2}$ comcentrations were relatively independent on local meteorological variables. Backward trajectory analysis results showed that the seasonal variation of the OS$_{2}$ concentration was mainly due to the inflow of air masses from the continent in spring and from the Pacific Ocean im summer. The results also revealed that the air masses with the highest SO$_{2}$ concentration came through China or the Korea peninsula in spring and through Japan during summer. It was found that the SO$_{2}$ concentrations at Kosan were under the influence of passage of air masses arriving at this site. |
