• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2005년도 Proceedings of ISRS 2005
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• pp.394-397
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• 2005

This study aims to estimate a heat island potential distribution based on the land-use types using LANDSAT/TM(1100LST April 2000) and AWS data in Daegu. The heat island potential is defined as a difference between surface temperature and air-temperature at each place. The study area was selected as about $900k km^2$ square including Daegu metropolitan area. Land-use data obtained by dividing all of Daegu metropolitan area into l-km-square three types of maps were prepared, in the 1 960s, 1970s and 2000s respectively. The types of land-use were divided into 5. Forest and farm lands have been reduced at a wide range during 40 years, most of which changed to urban area. The heat island potential distribution presented a striking contrasts according to land-use types. For example, the heat island potential of urban area was higher than $14^{\circ}$ in comparison to those of water or paddy rice areas.

• 한국환경과학회지
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• 제16권1호
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• pp.65-71
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• 2007

This study aims to estimate a urban heat island potential distribution based on the land-use types using Landsat TM(1100 LST August 2004) and AWS data in Daegu. The heat island potential is defined as a difference between surface temperature and air-temperature at each place. The study area was selected as about $900km^2$ square including Daegu metropolitan area. Land-use data obtained by dividing all of Daegu metropolitan area in- to 1-km-square three types of maps were prepared in the 1960s, 1970s and 2000s respectively. Land-use types were classified into 5 categories. Forest and farm lands have been reduced at a wide range during 40 years. Most of those changed into urban area. The heat island potential distribution presented a striking contrasts according to land-use types. For example, the heat island potential of urban area was higher than $10^{\circ}C$ in comparison to those of water or paddy rice areas.

• 한국측량학회지
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• 제36권4호
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• pp.305-316
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• 2018

우리나라의 도시화 비율이 증가함에 따라 도시열섬으로 인한 도시 열 환경의 중요성이 증대되고 있다. 본 연구에서는 2012년에 출범하여 급속도로 발전을 이룬 세종특별자치시의 도시 열 환경 분석을 위해 열섬포텐셜을 이용하였다. 우선 도심지의 비율 및 변화율을 분석하기 위해 Landsat-8 OLI/TIRS 위성영상을 기반으로 연구지역의 시계열 토지피복도(2013년~2015년, 2017년)를 생성하였다. 그리고 취득된 위성영상에서 제공하는 두 가지 열적외선 밴드에서 산출된 밝기온도와 자동기상관측망 자료와의 정확도 평가를 통해 연구에 활용할 밴드를 선정하였다. 선정된 밴드와 지표면 방사율을 고려하여 지표면온도를 산출하였으며, 이를 기반으로 산출된 열섬포텐셜 변화분석을 수행하였다. 분석결과, 연구지역의 행정구역별 도심지 변화율이 크게 관측되는 지역의 지표면온도는 주변지역 보다 $3^{\circ}C{\sim}4^{\circ}C$ 높고, 열섬포텐셜 또한 $4^{\circ}C{\sim}5^{\circ}C$ 높게 관측되었다. 하지만 도심지 변화율이 크고 녹지의 비율이 높은 지역에서는 열섬현상이 완화되는 경향을 보였다. 이를 통해 면적대비 도심지가 차지하는 비율이 높아지면 열섬을 유발할 가능성이 증가하지만 녹지를 통해 열섬을 완화 시킬 수 있다는 것을 알 수 있었다.

• 한국환경과학회지
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• 제20권9호
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• pp.1105-1114
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• 2011

In this study, thermal environment improvements throughout public design improvement project on the urban street space were compared and evaluated. Thermo-Render 3.0, 3D-CAD based thermal environment simulation program, had been used for thermal environment improvement evaluations. Followings are the results. First, clayey blocks which have low heat transfer rate and cool island effect by trees and roof gardens brought cooling effects for buildings and surface of streets. Seconds, MRT values showed low levels because of low radiant mulching materials. Thirds, roof gardens contributed to reduce heat island effect since HIP levels were affected by decreasing heat storage effect of buildings from roof gardens. As a result, reducing heat storage effect throughout selecting and arranging proper materials which would not increase heat island potentials should be performed to improve heat island effects.

• 한국지리정보학회지
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• 제15권4호
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• pp.65-77
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• 2012

본 연구에서는 부산의 지난 25년간 장기적 토지피복변화를 조사하고, 이어서 지표면 온도와 기온자료를 이용해서 열섬포텐셜을 평가하였다. 그 결과는 다음과 같다. 1975년부터 2000년까지 지난 25년 동안 부산의 도시면적은 2.5배 이상 증가하였다. 이처럼 단기간에 도시의 포장면적이 빠르게 증가한 것은 다른 나라에서는 유례를 찾아보기 어려운 우리나라 독특한 현상으로 판단된다. 이러한 과정을 통해서 도시열섬현상이 심화되었을 것이라는 것을 추정할 수 있었다. 지표면 피복에 따른 지표면 온도를 분석한 결과 도시화 지역과 산림지역의 온도가 현저히 차이가 나타났다. 특히 여름철에는 공단지역에서 $36{\sim}39^{\circ}C$로 높게 나타났으며, 반면 도시의 중심에 산지가 위치한 지역에서는 $22{\sim}24^{\circ}C$로 낮은 지표면 온도를 나타내었다. 토지피복도에 따른 열섬포텐셜은 지표면 피복 상태에 따라서 그 값이 달라짐을 알 수 있었다. 도시화지역 중 공업지역의 열섬포텐셜은 $6{\sim}8^{\circ}C$, 주거지역과 상업지역은 $0{\sim}5^{\circ}C$로 도시열섬을 유발할 가능성이 높음을 확인할 수 있었다. 반면 산림지역이나 농업지역 수변지역 열섬포텐셜 값은 $-6{\sim}-3^{\circ}C$로 나타났다. 본 연구결과를 통해 도시의 토지이용에 따른 기온상승효과를 평가하여 도시의 열환경 개선 및 환경친화적 도시개발 계획에 기초자료로 활용될 수 있을 것이다.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 하계학술발표대회 논문집
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• pp.877-882
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• 2008

The purpose of this study is to analyze the characteristics of outdoor thermal environment of flat-type apartment houses and tower-type apartment houses in summer by numerical simulation. After inputting a building condition at CAD, we calculated the surface temperature for two apartments by using the numerical simulation of a clear sky day in summer in Seoul. The results indicated that the variation in Heat Island Potential(HIP) of tow apartments were not only in the day but also in the night. According to form of apartment the flat-type apartment houses appeared $1.3^{\circ}C$ more highly tower-type apartment houses.

• KIEAE Journal
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• 제13권5호
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• pp.67-77
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• 2013

Based on the increasing demand for a solution to reduce thermal load, extensive green roofs have great opportunity for application to existing roofs due to their light-weight and easy maintenance. The present study delivers data regarding thermal behavior and heat reduction potential in relation to vegetation coverage between green roof types. 1) In the hottest hour in a day, green roofs showed considerable potential to mitigate heat load in roof environments, which can be up to $10^{\circ}C$ difference. 2) Compared to conventional cement roofs, the extensive green roofs only have a slight potential to cool the air over green roofs. By statistical analysis of linear regression, green coverage has little to do with the reduction of air temperature; the cooling effect was proven only in nighttime. 3) Green roofs act as an insulating roof membrane, the inner substrate of green roofs remained cooler than cement roof surfaces in the daytime, but in the nighttime the green roofs generally were warmer than the cement roof surfaces. 4) The variable of vegetation coverage resulted in no significant difference in thermal behavior in the air, but had the greatest effect in keeping the substrate cool in the daytime. The high vegetation coverage also hindered the rapid cooling of the substrate in the nighttime, and therefore was warmer than other measured temperatures. In order to draw a clear conclusion to combat urban heat island effect with extensive green roofs, the experiment needs to be applied on a larger scale.

• 한국환경복원기술학회지
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• 제15권1호
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• pp.107-117
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• 2012

We estimated the potential area roof greening in Gyeonggi-do that will mitigate the heat island effect. The estimation was based on building age, roof shape, and building use which were recorded in the building register from "Sewoomteo, the Building Administration System in the Ministry of Land, Transport and Maritime Affairs. The estimated potential roof greening area in Gyeonggi-do was approximately $102.5km^2$ assuming that the buildings for residence, public, education(school), office, shopping mall are appropriate for roof greening. The area occupied by apartment buildings over six-story was 76.3% of the potential roof greening area 10.2% for individual houses, 5.9% for under five-story apartment buildings, and 3.7% for school buildings. The result indicated that it is residential buildings that we need to pay attention for roof greening, especially high-rise buildings over six-story. Greening of the whole estimated area, $102.5km^2$, in Gyeonggi-do will result in the increase of green space per capita by $8.74m^2$. This is 1.65 times greater than the area of current urban parks, and 1.97 times greater than the total area of neighborhood parks, children's parks, and pocket parks. Greening of the estimated roof area will increase green coverage of urban area by twice, adding to current green coverage of the urban areas, 11.3%, in 10 major cities. In particular, the effect of roof greening would be remarkable in inceasing the green space of Anyang City, Gwangmyeong City, and Guri City where neighborhood park area falls short.

• 대한원격탐사학회지
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• 제39권5_1호
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• pp.481-493
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• 2023

고밀도 도심지의 열섬현상이 도시 기온을 더 높이고 있으며 이로부터 대기오염 악화, 냉방 에너지 소비 증가 및 온실가스 배출 증대와 같은 부정적 영향들이 발생한다. 녹지의 추가 확보가 어려운 도시 환경에서 옥상녹화는 효율적인 온실가스 감축 전략이다. 본 연구에서는 열섬현상 현황 분석에서 더 나아가 고해상도 위성자료 및 공간정보를 활용하여 연구 지역 내 옥상녹화 가용면적 산정 후 옥상녹화가 가져오는 온도 분포 예측을 통한 열섬현상 완화도 및 이산화탄소 흡수량 평가를 수행하였다. 이를 위해 WorldView-2 위성자료를 활용하여 부산시 도시열섬 지역의 기존 토지피복을 분류하고 머신러닝 기법을 적용하여 옥상녹화 전 후 온도 분포 예측 모델을 개발하였다. 옥상녹화 면적 변화에 따른 열섬현상 완화도를 평가하기 위해 랜덤포레스트 기법을 통해 온도가 종속변수인 온도 분포 예측모델을 구축하였고, 이 과정에서 랜덤포레스트 모델의 훈련자료로 사용될 고해상도 지표 온도 도출을 위해 Google Earth Engine을 활용하여 Landsat-8과 Sentinel-2 위성자료를 융합하는 다중회귀모델을 적용하였다. 또한, 옥상녹화용 초본식생별 이산화탄소 흡수량을 기반으로 녹화 면적에 따른 이산화탄소 흡수량을 평가하였다. 연구 결과를 통해 개발된 위성자료 활용 도시 열섬현상 평가 및 랜덤포레스트 모델 기반 온도 분포 예측 기술은 도시열섬 취약 지역에 확대 적용이 가능할 것으로 기대된다.

• Journal of Ecology and Environment
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• 제32권3호
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• pp.167-176
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• 2009

Land cover changes associated with urbanization have driven climate change and pollution, which alter properties of ecosystems at local, regional, and continental scales. Thus, the relationships among urban ecological variables such as community composition, structure, health, soil and functioning need to be better understood to restore and improve urban ecosystems. In this study, we discuss urban ecosystem management and research from a futuristic perspective based on analyses of vegetation structure, composition, and successional trends, as well as the chemical properties of soils and the distribution of heat along an urban-rural gradient. Urban thermo-profile analysis using satellite images showed an obvious mitigating effect of vegetation on the Seoul heat island. Community attributes of Quercus mongolica stands reflected the effects of urbanization, such as pronounced increases in disturbance-related and pollution-tolerant species, such as Styrax japonica and Sorbus alnifolia. Retrogressive successional trends were detected in urban sites relative to those in rural sites. Changes in the urban climate and biotic environment have the potential to significantly influence the practice and outcomes of ecological management, restoration and forecasting because of the associated changes in future bio-physical settings. Thus, for management (i.e., creation and restoration) of urban green spaces, forward-thinking perspectives supported by historical information are necessary.