• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.04a
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• pp.93-94
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• 2002

식생은 자연 VOC의 배출원으로써 대부분을 차지한다. 미국의 경우 자연 VOC의 배출량이 인위적인 것의 약 1.5배에서 많게는 10배 정도에 이를 것으로 추정하고 있으며 국내에서는 지금까지 자연적 VOC에 대한 직접적 배출량 산정은 한번도 이루어진 적이 없다. 우리나라는 전국토의 약 65%가 산림으로 이루어져 있어 NVOC가 인위적인 VOC의 양을 훨씬 초과 할 것이라는 것을 예측할 수 있다. (중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.11a
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• pp.302-303
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• 2002

알데히드와 케톤 등의 카르보닐화합물은 인체에 미치는 보건학적 영향과 광화학스모그 형성에 있어서의 주요기인자라는 2가지 측면에서 관심의 대상이 되고 있다. 카르보닐화합물은 제지, 접착제 등과 같은 제조공정에서 또는 차량으로부터 직접 배출될 뿔만 아니라 탄화수소 등의 광산화생성물이기도 하므로 1차 또는 2차 대기오염물로 존재하게 된다.(중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.11a
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• pp.229-230
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• 2002

식생은 자연 VOC(NVOC)의 가장 주요한 배출원이며, 대기중으로 유입되는 반응성이 강한 탄소의 주요한 배출원이다. 전 세계적으로는 NVOC의 배출량이 인위적인 것의 약 7배정도에 이를 것으로 추정되고 있다. 우리나라의 경우 전 국토의 2/3이상이 산림으로 이루어져 있어 NVOC가 인위적인 VOC의 양을 훨씬 초과할 것이라고 사료된다. (중략)

• Proceedings of KOSOMES biannual meeting
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• 2017.11a
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• pp.248-248
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• 2017

• Proceedings of KOSOMES biannual meeting
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• 2017.11a
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• pp.75-75
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• 2017

• Ocean and Polar Research
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• v.24 no.4
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• pp.331-343
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• 2002

The southern tidal flat of Kanghwa Island with an area of approximately $90km^2$ is one of the biggest flats on the west coast of Korea. Surface sediments for sedimentary analyses were sampled at 83 stations in August 1997, September 1999 and August 2000. The very poorly-sorted mud sediments were predominant in the eastern part of the tidal flat, whereas the poorly-sorted sand-mud mixed sediments were dominant in the western part. The area of muddy sediment distribution diminished, but that of sandy mud sediment extended to southeastward tidal flat for three years. In the western part of tidal flat, deposition occurred during the period of spring to summer, whereas erosion occurred in winter. Sediment accumulation rates during three years indicated that the sediments deposited continuously in the eastern part of tidal flat, whereas eroded in the western part of tidal flat. Recently, construction of artificial structures such as new airport, island-connecting bridges and dikes near the tidal flat might change tidal current and river flow pattern. In order to reduce the ecological damage and to preserve tidal-flat environment, it is necessary to Investigate long-term impacts on sedimentary environment and ecology.

• Asian Journal of Atmospheric Environment
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• v.11 no.3
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• pp.184-193
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• 2017

People spend the majority of their time in indoor environments. Maintaining adequate indoor temperature and humidity is necessary to support health and improve quality of life. However, people with low incomes can be vulnerable because they may not be able to use effective cooling and heating systems in their homes. In this study, the indoor temperature and humidity in low-income residences over a year in Seoul, Korea was characterized. Indoor temperature and humidity were measured in three types of homes (12 rooftop residences, 16 basement residences, and 18 public rental apartments) occupied by low-income residents. Both differed significantly among the three types of residence, particularly during the summer and winter seasons. A regression model between indoor and outdoor temperature detected a heating threshold at $3.9^{\circ}C$ for rooftop residences, $9.9^{\circ}C$ for basement residences, and $17.1^{\circ}C$ for public rental apartments. During tropical nights and cold-wave advisory days, rooftop residences showed the most extreme indoor temperatures. This study demonstrates that people living in rooftop residences could be at risk from extreme hot and cold conditions.

• Journal of Environmental Science International
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• v.24 no.9
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• pp.1171-1180
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• 2015

To investigate thermal environment and effect of clean-road system over a broad way, we conducted the filed meteorological observation during 12~13 August 2014. The clean-road system was employed over a part of the broad way of Dalgubul(Dalgubul-Daero) by Daegu Metropolitan city in 2011. The clean-road system in general is operated two times(4 am, 2 pm) during summertime. In case of scorching alert, the system is operated 3 times a day(4 am, 2 pm and 4 pm). To evaluate the present thermal condition and the improvement effects due to the system, we analyzed the time variation of discomfort index and WBGT(wet-bulb and globe temperature). WBGT was more than 25 during 8 a.m. ~ 9 p.m. And discomfort index was more than 75 during 8 a.m. ~ 11 p.m. The thermal improvement effect of the clean-road system was restrictive during daytime.

• Journal of Environmental Impact Assessment
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• v.18 no.6
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• pp.321-330
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• 2009

Spatiotemporal changes in the thermal environment in a large city, Seoul, Korea were analyzed using a thermal index, perceived temperature (PT), to standardize the weather conditions. PT is a standard index for the thermal balance of human beings in thermophysiological environment. For the analysis of PT, the data from long-term monitoring and intensive observations in and around the inner-city stream called 'Cheonggye' in Seoul, were compared with a reference data from the Seoul weather station. Long-term data were monitored by installing two automatic weather stations at 66m (S1) and 173m (S2) away from the center of the stream. Through the analysis of the data during the summer of 2006 and intensive observation periods, it was revealed that the stream's effects on the PT extended up to the distance of the S1 site. In winter, the increase of the PT between pre- and post-restoration was stronger at S1, which was nearer than S2 from the stream. These results suggest that PT can be used as an effective model in analyzing the changes of the thermal environment in relation with the changes of water surface areas.

• Journal of the Society of Naval Architects of Korea
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• v.42 no.6 s.144
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• pp.679-685
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• 2005

Until now, the stealth design to reduce the infrared signature of ship haven't been carried out using the proper design criteria. The study on the maritime meteorological environment in the Korean seas hasn't been accomplished yet, so the design criteria of the maritime meteorological environment was just given by the engineering sense without experience of the Navy and/or of the shipyard. Even in rather good conditions(summer condition), the estimated IR signature of a ship showed larger values and couldn't predict the worst condition during the operation of a ship at sea. In this study, domestic maritime meteorological data were collected and variables affecting the IR signature of a ship had been derived through the sensitivity study of IR signature according to the maritime meteorological environment in Korean seas. The basic study on the criteria of the stealth design of IR signature has been carried out.