• 한국주거학회:학술대회논문집
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• 한국주거학회 2009년도 추계학술발표대회 논문집
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• pp.100-103
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• 2009

The impermeable area on the surface of city has been increased as buildings and artificial landcover have continually been increased. Urban development has gradually decreased the green zone in downtown and alienated the city from the natural environment on outskirt area devastating the natural eco system. There arise the environmental problems peculiar to city including urban heat island phenomenon, urban flood, air pollution and urban desertification. As one of urban plans to solve such problems, green roof system is attracting attentions. The purpose of this study was to investigate the heat reduction effect according to the development of green roof system and to quantify the heat reduction effect by analyzing through simulation the heat environment before and after green roof system. For thermal environment analysis, Thermo-Render 3.0 was used that was developed by Tokyo Industrial College to simulate. The simulation showed that the heat island index before and after the development of tree-planting on rooftop changed maximum $0.86^{\circ}C$ and the surface temperature changed about $20^{\circ}C$. Only with lawn planting, heat reduction effect was great and it means that the green roof system in low-management-light-weight type is enough to see effect. The simulation identified that only lawn planting for green rooftop brought such difference and could lower the heat island index at a narrow area. It is judged that application of green roof system to wider areas might relieve urban heat island phenomenon positively.

• 한국지리정보학회지
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• 제15권1호
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• pp.133-143
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• 2012

본 연구는 창원시 도시지역을 대상으로 도시공간을 고려한 야간시간대의 도시열섬특성을 파악하기 위해 1:1,000 축척의 토지이용도 및 토지피복도와 DTM, 그리고 ASTER 위성영상에서 추출된 야간시간대의 지표온도자료를 활용하였다. 분석결과에 따르면, 야간시간대는 건물이 밀집되어있는 단독주거지역이 상업지역이나 공공시설지역보다 열섬강도가 높았고, 이것은 에너지소비에 의한 인공열 방출이 열섬형성에 많은 영향을 미치기 때문으로 판단된다. 또한 이러한 점 때문에 공업지역에서는 건물은 가동시간에 따라 온도차이가 매우 크게 나타났다. 한편, 도시녹지지역과 하천지역은 도시열섬을 완화하는 냉각효과가 있는 것으로 확인되었으며, 열섬강도가 높은 지역에 녹지 및 수변공간의 조성으로 열섬강도를 낮출 필요가 있을 것으로 판단된다. 이상과 같은 결과는 야간시간대의 도시열섬을 완화하는데 있어 개발계획 수립시 효율적인 공간활용을 위해 기초자료로 이용될 것으로 사료된다.

• 대한원격탐사학회지
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• 제38권3호
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• pp.225-236
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• 2022

도시의 인구 증가와 이에 따른 개발로 인한 도시화는 도시 내 열섬현상과 같은 다양한 환경문제를 유발할 수 있다. 특히 계획적으로 구축되는 신도시의 경우 짧은 기간에 진행되는 급격한 도시화로 인한 도시 기후의 변화를 분석하기에 적절한 연구대상지로 여겨진다. 본 연구에서는 Landsat-8 Operational Land Imager/Thermal Infrared Sensor (OLI/TIRS) 위성영상을 활용하여 세종특별자치시 내 행정중심복합도시의 2013년부터 2020년 개발계획에 의한 토지피복 변화와 이에 따른 표면 열섬현상의 변화를 분석하였다. 이를 위해 위성영상에서 제공하는 열적외선 밴드값과 방사율을 고려하여 지표면온도를 산출하고, 이를 기반으로 표면 열섬현상 강도와 Urban Thermal Field Variance Index (UTFVI)의 변화분석을 수행하였다. 개발이 진행됨에 따른 토지피복 변화 및 피복별 열섬현상 강도의 차이 확인을 위해 환경부에서 제공하는 중분류 토지피복지도를 활용하였다. 분석 결과, 연구지역의 시가화 면적은 15% 증가하였고 자연식생은 28% 이상 줄어든 것이 확인되었다. 또한 이에 따른 열섬현상의 확장 및 강도 증가가 관측되었고, 열섬현상이 발생된 지역의 생태적 수준은 매우 낮은 것을 확인하였다. 본 연구를 통해 급격한 도시화에 따른 열 환경의 정량적 변화 및 생태적 수준을 확인하고, 주거환경의 열 환경 개선을 위한 추가적인 정책의 필요성이 제시될 수 있다.

• 한국환경과학회지
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• 제23권11호
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• pp.1807-1820
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• 2014

The spatial and temporal changes of the annual mean urban heat island(UHI) intensity were investigated using near surface temperature data measured at 16 automatic weather systems(AWS) in Busan metropolitan area(BMA) during the 11-yr period, from 2000 to 2010. For nighttime, the annual mean UHI intensity at Dongnae(U1) in 2000 was weaker than it in 2010. However the change of the annual mean UHI intensity at Daeyeon(U2) during 11 years was different from it at U1. The annual frequency of the UHI intensity over $5^{\circ}C$ considerably increased at U2 and decreased at U1 during 11 years. The center of the UHI also spatially shifted southward with Daeyeon and Haeundae in BMA. It would be caused by the increase of urban area, population-density and transportation near U2 and by the decrease of them near U1. We found that the spatial and temporal differences of the UHI intensity have coincided with changes of land-use, population density and transportation in BMA.

• 한국대기환경학회지
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• 제28권2호
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• pp.119-130
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• 2012

Heat island phenomena in Chuncheon (Korea) were investigated using air temperature measured by automatic weather stations and temperature dataloggers located at rural and urban sites. Numerical simulation of the phenomena was performed using Weather Research and Forecasting Urban Canopy Model (WRF-UCM) and results were compared with the observation. The model was initialized with NCEP/FNL data. The horizontal resolution of the fine domain is 0.33 km. The results of observational analyses show that the intensity of heat island was significantly higher during the nighttime than during the daytime. The highest measured temperature difference between rural and urban site is $3.49^{\circ}C$ and average temperature difference varies between 1.4 and $1.9^{\circ}C$. Good agreement was found between the simulated and observed temperatures. However, significantly overestimated wind speed was found at the urban sites. The linear regression analysis between observed and simulated temperature shows high correlation coefficient 0.96 for urban and 0.94 for rural sites while for wind speed, a very low correlation coefficient was found, 0.30 and 0.55 respectively.

• 한국환경과학회지
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• 제31권1호
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• pp.9-21
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• 2022

Today's cities require deeper understanding of the thermal environment and PM₁₀ as their management becomes more critical. Based on these circumstances, this study investigated the Granger causality between the thermal environment and PM₁₀ of the 25 districts of Seoul, the most populous and urbanized city in Korea. The results of the Granger causality test on the thermal environment and PM₁₀ were classified into 12 types. Except for type 12, the temperature and urban island heat intensity of the other 11 types operated as a Granger-cause to each other in both directions. Temperature operates as a Granger-cause of urban island heat intensity in type 12. The PM₁₀ level and urban pollution island intensity operated as a Granger-cause to each other in all districts. For types 1 and 2, thermal environment operated as a Granger-cause to PM₁₀ in one direction, and type 3-type 12 confirmed that thermal environment and PM₁₀ operated as a Granger-cause in both directions. Findings reveal the intricate causalities between thermal environment and PM₁₀ at the district level and suggest mitigation strategies that are more location based.

• 환경영향평가
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• 제8권2호
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• pp.73-82
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• 1999

This study analyzed the relationship between NDVI(Normalized Difference Vegetation Index) and urban heat island in three cities: Daegu, Kyungju, and Pohang for understanding the degree of nature conservation concentrating in the transition zone of them. Daegu city is the third city in Korea which has a dense population. Kyungju is a traditional city which has good nature. Pohang is an industrial city which has those of characters of Daegu and Kyungju. Landsat 1M data in May 17, 1997 were used for the analysis of heat island. There were about four theoretical models to estimate the surface temperature from TM data: Two-point linear model, Linear regression model, Quadratic regression model, and Cubic regression model. In this study, Linear regression model had been utilized to analyze the urban heat island. On the resultant images, the transition zone of Daegu was urbanized more extremely than those of other two cities. It is thought that the analysis of relationship between NDVI and surface temperature, used in this study, is regarded as one of effective methodologies for urban-environmental detection from satellite imageries.

• 대한원격탐사학회지
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• 제39권5_3호
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• pp.921-932
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• 2023

도시 인구집중 및 도시확장에 의한 토지피복 변화는 도시 내 열섬현상과 같은 다양한 환경문제를 유발할 수 있다. 특히 계획적으로 구축되는 신도시의 경우 짧은 기간에 진행되는 급격한 도시화로 인한 도시 기후의 변화를 분석하기에 적절한 연구대상지로 여겨진다. 본 연구에서는 Landsat 위성영상을 활용하여 분당 및 판교 신도시를 대상으로 개발 전후 토지피복 변화와 이에 따른 표면 도시열섬(surface urban heat island, SUHI) 현상의 변화를 비교, 분석하였다. 또한 SUHI 강도에 영향을 끼칠 수 있는 도시구조적 특징들 간 상관분석을 수행하였다. 분석 결과, 신도시 개발이 진행됨에 따른 토지피복의 급격한 변화 및 이에 따른 SUHI 현상의 직접적인 심화를 확인하였다. 본 연구를 통해 각기 다른 도시계획에 의한 SUHI 현상의 차이를 확인하고 열 환경 개선을 위한 입체적인 도시계획의 필요성이 제시될 수 있다.

• 설비공학논문집
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• 제16권10호
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• pp.984-989
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• 2004

Significant air temperature increases in urban areas is well known as the heat island phenomenon in a global scale. Therefore, we propose numerical model in order to analyze quantitative effects of building environmental factors on the heat island phenomenon in urban area. In this paper, thermal property of upper atmosphere is experimentally investigated for Sakae, Nagoya Japan. In conclusion, it was confirmed that the boundary layer of a urban canopy existed near the altitude of 139 m.

• 한국산업융합학회 논문집
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• 제13권2호
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• pp.55-61
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• 2010

Significant air temperature increases in urban areas are known as the heat island phenomenon in a global scale. Therefore, we use CFD simulation in order to analyze quantitative effects by placing a Building and Green on the heat island phenomenon in urban area. The present study quantitatively analyzes the Urban Heat Island Effects, Outdoor air temperature, and Humidity and air flow.