장기간(1997~2007) 창공관측을 이용한 서해상 SO2및 NOx의 거동 연구

Abstract

Aircraft Measurements of gaseous pollutants(<TEX>$SO_2$</TEX>, NOx and <TEX>$O_3$</TEX>) in the Yellow Sea area, were carried out on 1997-2007. Main measurement site in 124<TEX>$^{\circ}$</TEX>-127<TEX>$^{\circ}$</TEX>E, 35<TEX>$^{\circ}$</TEX>-37<TEX>$^{\circ}$</TEX>N (in the Yellow Sea), have been done along the paths classified vertically and zonally. To understand how the air stream affects Long-range transboundary pollutants in Northease Asia (LTP), the tracks of pollutants in northeast Asia have been analyzed by dividing into 6 different regions(regions I-V and L). Compared with Korea's local sources and western north Pacific influenced by the Yellow Sea, when the air stream from region II is dominant, the <TEX>$SO_2$</TEX> concentrations are 3-6times higher. In region II and III, <TEX>$SO_2$</TEX> concentrations are represented highest at 25.0 and 14.7 ppb, respectively. However, in other regions, <TEX>$SO_2$</TEX> concentration was recorderd the highest at 1.1-3.8 ppb, which is 7-15% higher then the highest one over the region II and III. During 1997-2007, the mean amount of incoming pollutants is 0.162 <TEX>$ton/km{\cdot}hr$</TEX> exceeding about 5-times mean amount of outgoing pollutants over the West Sea. During the observed period, the amount of incoming and outgoing <TEX>$SO_2$</TEX> over the Yellow Sea is the highest in winter, at 0.224 <TEX>$ton/(km{\cdot}hr)$</TEX> and 0.120 <TEX>$ton/(km{\cdot}hr)$</TEX>, respectively.