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2010년 3월 20일 부산지역에 발생한 극심한 황사의 에어로솔 농도 분포 특성
정운선 ( Woon Seon Jung ),박성화 ( Sung Hwa Park ),이동인 ( Dong In Lee ),강덕두 ( Deok Du Kang ),김동철 ( Dong Chul Kim ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.2
Asian dust (or yellow sand) occurring mainly in spring in East Asia is affected by the distribution of weather systems. This study was performed to investigate the characteristics of suspended particulate for Asian dust at Busan, Korea in 20 March 2010, which was one of the extreme case for the last 10 years. There was used the data of weather chart, satellite, automatic weather system (AWS), PM10, laser particle counter (LPC), and backward trajectories model. In synoptically, the high pressure was located in the northwestern part and low pressure was located in the northeastern part of Korea. The strong westerly winds from surface to upper layer makes it possible to move air masses rapidly. Air masses passing through Gobi Desert in Mongolia and Inner Mongolia plateau covered the entire Korean peninsula. As the results of aerosol analysis, PM10 concentration at Gudeok mountain in Busan was recorded 2,344 ㎍/m3 in 2300 LST 20 March 2010 and their concentration was markedly increased at coarse mode particle. In surface condition, westerly wind about 3 ∼ 5 m/s was dominant and small particles of 0.3 ∼ 0.5 ㎛ were distributed on the whole. In heavy metal components analysis, the elements from the land was predominated.
정운선 ( Woon Seon Jung ),박성화 ( Sung Hwa Park ),강덕두 ( Deok Du Kang ),이동인 ( Dong In Lee ),김동철 ( Dong Chul Kim ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.1
The seasonal variation of pH and ion components in precipitation were investigated from January to December 2009 at Busan, Korea. The precipitation was acidic with a volume-weighted mean pH concentration of 5.32, which ranged from 3.79 to 8.66. The volume-weighted mean conductivity showed 86.77 μS/cm and indicated higher concentration about 96.69 μS/cm in summer. The volume-weighted mean equivalent concentration of components followed the order: K+ > Ca2+ > nss-Ca2+ > NH4+ > Mg2+ > Na+ > Li+ in cations and Cl- > SO42- > nss-SO42- > NO3- > NO2- > F- > Br- in anions. Particularly, concentration of K+ and Cl- showed 56 and 78 % in cations and anions. The higher concentration in K+, Na+, Mg2+ and Cl- were shown in Busan city as compared to the other cities. The neutralization factors have been found to have higher value for potassium ion in winter compared with different seasons, indicating significant neutralization of acidic components over the region by potassium. Therefore, the precipitation characteristics at Busan had both continental and coastal as consequence of pH, conductivity and ionic analyses.