• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2008년도 추계학술발표대회 논문집
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• pp.69-74
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• 2008

This study is to analyze and compare on the sky condition of cloud amount and measured solar horizontal irradiation in Seoul. Sky cover method is determination of sky condition used by cloud amount of the Meteorological Administration. And HCI method is determination of sky condition used by measured solar horizontal irradiation. The HCI methods of Erbs et al.(1982), Orgill and Hollands(1977) appear a lot of error because of the air pollution such as smog phenomenon or yellow sand phenomenon and so on. Therefore, The purpose of this study is to improve the method for determination of sky condition.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2002년도 하계학술대회 논문집
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• pp.222-225
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• 2002

The nitrogen oxides, NO and NO2, abbreviated usually as NOx, emitted from combustion facilities such as power plants and automobiles are the typical air-pollutants causing acid rain and photochemical smog. In order to solve the NOx-related pollution problems effectively, we need efficient techniques to monitor NOx in the combustion exhausts and in environments. Development of solid-state electrochemical devices for detecting NOx is demonstrated based on various combination of solid electrolytes and auxiliary sensing materials. The object of this research is to develop various sensor performance for solid state amperometric sensor, and to test gas sensor performance manufactured. So we try to present a guidance for developing amperometric gas sensor.

• 환경영향평가
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• 제5권1호
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• pp.69-77
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• 1996

The variations of ozone concentration and the sensitivity test for VOC emission intensities was investigated by means of a PBM(Photochemical Box Model). Compared to monitoring data, the typical variations of $NO_2$, CO, $O_3$ for days were successfully reproduced. Model results revealed that maximum ozone concentration got increased with the increase of VOC emission, that is, VOC played the important role in producing the photochemical smog.

• 한국대기환경학회지
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• 제11권3호
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• pp.291-298
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• 1995

An intensive field study was carried out during Aug. 1993 in Seoul to study the characteristics of summertime visibility and diurnal trend of ionic composition of ambient particles. A transmissometer, nephelometer with heated and unheated inlets, PM3 fine particle sampler, and cascade impactor were used to measure optical and particle properties of ambient air. During this study period, a weak smog episode has occurred. Light scattering by particles is the most dominant factor on total light extinction. The effect of light absorption by particles in Seoul is much higher than other major cities in U.S.A. throughout the summer and fall with relatively constant values. The effect of water on $b_{sp}$ was small during the period. The particle size distribution shows a typical bimodal one. Sulfate, ammonium, chloride, and nitrate are the major chemical species in fine fraction aerosols, about 30% of toral mass concentration. Concentraion of sulfate is higher during the daytime while those of nitrate and chloride are higher during the nighttime. Ammonium concentration is constant through the daytime.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2003년도 추계학술대회 논문집
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• pp.239-240
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• 2003

스모그 챔버는 대기 중 성분들의 화학 반응 기작을 연구하는데 사용되고 있다. 그러나, 기존 연구에서는 광화학 반응 전구물질의 농도가 실제 대기 농도보다 높고, 청정 공기에 연구 대상 전구물질만을 주입한 단순 혼합물을 이용하였으며, 여러 날에 걸쳐 반응이 진행된 성분들을 이용하지 않았다 (Dodge, 2000). 이와 달리 본 연구팀에서는 실내 스모그 챔버에 실제 대기를 도입하여 광화학 반응 실험을 수행하고 있다 (배귀남 등, 2003). 한 개의 스모그 챔버를 이용하는 경우 외기의 특성상 매 실험마다 초기조건이 달라지기 때문에 단일 인자의 차이에 따른 영향을 파악하기가 쉽지 않았다 (배귀남 등, 2003b). (중략)

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2002년도 춘계학술대회 논문집
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• pp.173-174
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• 2002

2000년 후반을 기준으로 서울시는 인구 1,030만명(남한 전체인구의 25%), 가구 수 350만 가구, 자동차 등록대수는 240만대(남한 전체등록대수의 20%)인 반면, 서울시 전체면적은 605.5 $\textrm{km}^2$으로서 전체 남한 면적의 약 0.6%에 해당하는 거대도시이다 또한 대기오염측면에서 볼 때, 대기오염물질이 확산되기 어려운 분지형태이고, '88-'92년 동안의 대기안정도를 산출한 결과, 약한 안정 및 안정상태가 45% 정도로 대기오염 확산이란 측면에서 매우 불리한 특성을 지니고 있다(어수미 등, 1997) 이러한 토시에서 빈번하게 일어날 수 있는 대기오염현상이 Haze(or smog)이며, 시정장애가 동반된다. (중략)

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 E
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• pp.2224-2226
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• 1999

Non-thermal plasma techniques is applied in many fields. Recently acid rain, global warming, ozone depletion, and smog are preeminent environmental problems. The cause for this environmental problems is the flue gas. Non-thermal plasma techniques has an attention for the solution of flue gas. Non-thermal plasma is used for the removal of flue gas composed of NOx, etc. This field has grown dramatically. This experiment is performed by using cylinder type reactor under the condition of room temperature and atmosphere pressure. NO gas is used instead of flue gas. Bidirectional pulse generator is used instead of the unidirectional pulse generator to increase the efficiency.

• 과학과기술
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• 제10권6호통권97호
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• pp.33-37
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• 1977

일본 환경행정의 총사열탑인 환경청이 발족한 것은 1971년 7월 이엇으며 기문 현안중이었던 환경행정의 기초가 될 과학적 데이터의 수집을 위한 연구 기관의 설립이 1974년 3월에 자성현에 있는 연구학원 도시내에 일본 국립공해연구소가 탄생함으로서 실현되었다. 동연구소는 「인간활동의 결과로 발생한 인간자신과 환경에 대한 위협을 제거하는데는 인간의 지헤 밖에 없고 이일에 기초가 되는 환경과학의 연구를 촉진시키기 위하여 공해연구소가 설립되었다」고 연구소의 존재의의를 밝힌다. 당초 40여명이었던 직원이 현재 154명이 되었고 연구부문과 연구 실험시설도 정비되어 이제 연구소로서의 면모를 갖추어 가고 있다. 각 연구동의 건설과 식물 실험용 환경조절장치와 같은 대형 실험 연구시설이 들어앉게 되었고 특히 최근에 3개의 최신 시설이 완성되었다. 즉 대형 광학화 스모크 챔버(Smog Chamber),주우트론(동물 실험용 환경조절 시설),그리고 애크워트론(육수환경 실험 시설)으로 이들 시설을 사용하여 환경과학을 위한 본격적인 실험연구를 시작할 채비가 갖추어졌다. 이 3개 시설을 중심으로 일본 국립공해연구소를 소개한다.

• 한국대기환경학회지
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• 제12권4호
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• pp.407-419
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• 1996

Characteristics of visual air quality in Seoul have been investigated between June 13 and 21, 1994. Optical properties (extinction coefficient and particle scattering coefficient), meteorological parameters (relative humidity, temperature, wind speed, wind direction, and cloud cover), particle characteristics (mass size distribution, components) were measured and analyzed. During measurement periods, northwest wind with less than 2m/sec of wind speed deteriorates visibility. Effects of relative humidity are though to be not a direct factor which influence to visibility through the size change due to hygroscopic species in aerosol. During the smoggy period both the aerosol mass concentration and fine particle fraction of the size distribution are increased compared to the clear period. Sulfate, organic carbon, and elemental carbon in aerosol are the major species in determining the occurrence and severity of a smog in Seoul.

• Journal of Korean Society for Atmospheric Environment
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• 제20권E2호
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• pp.61-68
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• 2004

Aerosol losses in a 100L Tedlar$^{(R)}$ bag were investigated for the aerosols with number median diameter of 0.05 ${\mu}{\textrm}{m}$ and number concentration of 6.4 ${\times}$ 10$^4$ cm$^{-3}$ . Over a 1 hr period, loss of particles in the bag is apparent, and the volume decrease with time is significant. The number concentration, surface area, and volume concentration of the aerosols decreased to 34, 50, and 52% of the initial value in 30 min, respectively. This indicates that deposition to the walls was the main loss process for aerosols in the Tedlar$^{(R)}$ bag. Theoretical calculations showed that coagulations and deposition by diffusion and gravitational sedimentation would not change aerosol characteristics significantly, and the electrical force was the dominant loss process for particles in the Tedlar$^{(R)}$ bag over a 1 hr period.eriod.