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김나경,김용표,강창회,문길주 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.1
The nitrate concentrations in PM_(2.5) and TSP measured at Gosan, Jeju Island, Korea, between March 1998 and February 2002, are discussed. Especially, the characteristics of high nitrate concentration days were analyzed. High nitrate concentration cases in PM_(2.5) were highly correlated with anthropogenic species such as NH₄^(-), and high nitrate concentration cases in TSP were highly correlated with crustal species such as nss-Ca^(2+) and nss-Mg^(2+) Backward trajectory analysis results show the cases of high correlation between nitrate and anthropogenic species occurred when the air parcels moved from China, and the cases of high correlation between nitrate and crustal species occurred when the air parcels moved from Mongolia. Also, high nitrate concentration cases occurred most often in spring (65%) when the air parcels moved from Mongolia and China.
서울과 고산의 미세입자 수분함량에 영향을 미치는 주요 인자
최은경,김용표 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.6
Water contents in fine particles at Seoul and Gosan are estimated by using a gas/particle equilibrium model, SCAPE(Simulating Composition of Atmospheric Particles at Equilibrium) Also, sensitivity of particulate inorganic ionic concentrations on the total ionic species is estimated Water content at Gosan is more sensitive to ambient relative humidity (RH) than Seoul At both sites water content is most sensitive to sulfate concentration among sulfate, nitrate, and ammonium Solid salts levels and compositions are also studied
여민주,김용표 한국대기환경학회 2005 한국대기환경학회지 Vol.21 No.1
It is widely accepted that, at present, the SO₂ emissions in China are not increasing thanks to the rigorous Chinese government policies. However, with the development of western China, it is possible that the SO₂ emission amounts might increase in regional scale. In this study, changes of sulfur deposition pattern and unprotected ecosystem in east Asia due to the sulfur emission pattern changes in China are studied by using the RAINS-Asia model. Five scenarios have been postulated to understand the effects on east Asia, especially, on Korea and Japan. It is found that the increase of SO₂ emission in western China might increase the total emission in whole China. And the amount of sulfur deposition from western China on east Asia would be higher than those from eastern China. The deposition amount of sulfur species on Asia is 3.2 Mt when SO₂ are emitted from western China only while 2.6 Mt from eastern China only. Generally, Korea and Japan are influenced more by emissions from eastern China than western China. However, if the SO₂ emissions from western China increase by 100% while those decrease by 10% in eastern China compared to the base case, the deposition amount of sulfur species on Korea and Japan would be higher than the base case. The fraction of unprotected ecosystem in Korea and Japan for the base case are 50 and 5%. However, if the emissions from western China increase by 100% while those decrease by 10% in eastern China, the fraction of unprotected ecosystem in Korea and Japan would be 52 and 6%.
광화학 상자모델과 기체/입자 평형모델을 이용한 서울ㆍ수도권의 계절별 질산염 농도 변화
이시혜,김영성,김용표,김진영 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.6
Seasonal variation of major inorganic ions in the greater Seoul area was estimated using a photochemical box model and a gas/aerosol equilibrium model with emphasis on semi-volatile filtrate Pollutant emission was determined by season by comparing the predicted concentration with the measurement one obtained for a year from the late 1996 The results showed that particulate nitrate was the highest in summer but about 40% of total nitrate was present in the gas phase This was due to volatilization at high temperature since ammonia was sufficient to neutralize all nitrate regardless of season As relative humidity 10 summer was higher than the deliquescence point, particulate Ion concentration with water was two times higher than that in other season So called 'NOx disbenefit' indicating Increase In particulate ion concentration With decrease In NOx emission was evident especially in winter.