서울 관악산 대기 중의 SF6에 관한 연구
Atmospheric Sulfur Hexafluoride (SF6) near the Kwanak Mountain, Seoul
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초록
Sulfur hexafluoride (SF6), man-made compound, has been paid attention as a potent greenhouse gas. After Kyoto Pototcol on Climate Change in 1997, nations established the policy aimed at minimizing release of SF6 to atmosphere. We have developed and operated an automatic analytical system for monitoring atmospheric SF6 using gas chromatography with electron capture detector (GC-ECD) and packed separate-column. Here, we report and discuss 4-month record of atmospheric SF6 concentrations monitored at Seoul National University (SNU) pilot station near the Kwanak Mountain, Seoul. Most of observed SF6 concentrations were excessively high compared with Northern Hemisphere (NH) background trend obtained from National Oceanic and Atmospheric Administration (NOAA) Earth System Research Laboratory (ESRL) monitoring stations. And the observed SF6 showed extremely wide variability ranging from 4.6 pptv to 1.1×10³ pptv, which may be affected by local sources placed nearby. Simultaneous wind data with SF6 measurements show that relatively high values of SF6 correspond to weak wind as well as southerly. There are many engineering installations to the south of the station. The regional value of the atmospheric SF6 estimated from the data selection by wind conditions is about 6.8 pptv. This value, which is similar to concentrations of urban areas, is higher than NH background concentration.
Abstract
Sulfur hexafluoride (SF6), man-made compound, has been paid attention as a potent greenhouse gas. After Kyoto Pototcol on Climate Change in 1997, nations established the policy aimed at minimizing release of SF6 to atmosphere. We have developed and operated an automatic analytical system for monitoring atmospheric SF6 using gas chromatography with electron capture detector (GC-ECD) and packed separate-column. Here, we report and discuss 4-month record of atmospheric SF6 concentrations monitored at Seoul National University (SNU) pilot station near the Kwanak Mountain, Seoul. Most of observed SF6 concentrations were excessively high compared with Northern Hemisphere (NH) background trend obtained from National Oceanic and Atmospheric Administration (NOAA) Earth System Research Laboratory (ESRL) monitoring stations. And the observed SF6 showed extremely wide variability ranging from 4.6 pptv to 1.1×10³ pptv, which may be affected by local sources placed nearby. Simultaneous wind data with SF6 measurements show that relatively high values of SF6 correspond to weak wind as well as southerly. There are many engineering installations to the south of the station. The regional value of the atmospheric SF6 estimated from the data selection by wind conditions is about 6.8 pptv. This value, which is similar to concentrations of urban areas, is higher than NH background concentration.
참고문헌 (16)
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