Daytime urban heat island effect in high-rise and high-density residential developments in Hong Kong

Giridharan, Renganathan; Ganesan, S.; Lau, Ssy

doi:10.1016/j.enbuild.2003.12.016

Cited by 249 publications

(110 citation statements)

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“…The UHI intensity was found to be inversely correlated with the rural temperature, while the spatial extent was found to be independent of both heat island magnitude and rural temperature by Streutker (2002). Giridharan et al (2004) studied the daytime UHI effect in high-rise and high-density residential developments in Hong Kong. Hawkins et al (2004) studied the effect of rural variability in calculating the urban heat island effect.…”

Section: * Corresponding Authormentioning

confidence: 99%

Spatio-temporal Assessment of Land Use/ Land Cover Dynamics and Urban Heat Island of Jaipur City using Satellite Data

Jalan

Sharma

2014

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:Urban Heat Island (UHI) refers to the phenomena of higher surface temperature occurring in urban areas as compared to the surrounding countryside attributable to urbanization. Spatio-temporal changes in UHI can be quantified through Land Surface Temperature (LST) derived from satellite imageries. Spatial variations in LST occur due to complexity of land surface -combination of impervious surface materials, vegetation, exposed soils as well as water surfaces. Jaipur city has observed rapid urbanization over the last decade. Due to rising population pressure the city has expanded considerably in areal extent and has also observed substantial land use/land cover (LULC) changes. The paper aims to determine changes in the LST and UHI phenomena for Jaipur city over the period from 2000 to 2011 and analyzes the spatial distribution and temporal variation of LST in context of changes in LULC. Landsat 7 ETM+ (2000) and Landsat 5 TM (2011) images of summer season have been used. Results reveal that Jaipur city has witnessed considerable growth in built up area at the cost of greener patches over the last decade, which has had clear impact on variation in LST. There has been an average rise of 2.99 ºC in overall summer temperature. New suburbs of the city record 2º to 4⁰ C increase in LST. LST change is inversely related to change in vegetation cover and positively related to extent of built up area. The study concludes that UHI of Jaipur city has intensified and extended over new areas.

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Section: * Corresponding Authormentioning

confidence: 99%

Spatio-temporal Assessment of Land Use/ Land Cover Dynamics and Urban Heat Island of Jaipur City using Satellite Data

Jalan

Sharma

2014

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…The UHI exacerbates heat waves during the summer, increases energy consumption, and more importantly elevates the risk of heat-related morbidity and mortality, especially for the elderly, young children, and low-income residents, who are more vulnerable to excessive heat stress due to a variety of physical, social, and economic reasons [5][6][7][8][9]. Many existing studies have made attempts to understand and mitigate UHI effect in major cities all over the world, such as London, Beijing, Paris, Shanghai, Hong Kong, and Moscow [10][11][12][13][14][15][16]. UHI mitigation via sustainable design of the urban environment has received increasing attention from ecologists, urban planners, and policymakers.…”

Section: Introductionmentioning

confidence: 99%

Rooftop Surface Temperature Analysis in an Urban Residential Environment

et al. 2015

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Abstract:The urban heat island (UHI) phenomenon is a significant worldwide problem caused by rapid population growth and associated urbanization. The UHI effect exacerbates heat waves during the summer, increases energy and water consumption, and causes the high risk of heat-related morbidity and mortality. UHI mitigation efforts have increasingly relied on wisely designing the urban residential environment such as using high albedo rooftops, green rooftops, and planting trees and shrubs to provide canopy coverage and shading. Thus, strategically designed residential rooftops and their surrounding landscaping have the potential to translate into significant energy, long-term cost savings, and health benefits. Rooftop albedo, material, color, area, slope, height, aspect and nearby landscaping are factors that potentially contribute. To extract, derive, and analyze these rooftop parameters and outdoor landscaping information, high resolution optical satellite imagery, LIDAR (light detection and ranging) point clouds and thermal imagery are necessary. Using data from the City of Tempe AZ (a 2010 population of 160,000 people), we extracted residential rooftop footprints and rooftop configuration parameters from airborne LIDAR point clouds and QuickBird satellite imagery (2.4 m spatial resolution imagery). Those parameters were analyzed against surface temperature data from the MODIS/ASTER airborne simulator (MASTER). MASTER images provided fine resolution (7 m) surface temperature data for residential areas during daytime and night time. Utilizing these data, ordinary least squares (OLS) regression was used to evaluate the relationships between residential building OPEN ACCESSRemote Sens. 2015, 7 12136 rooftops and their surface temperature in urban environment. The results showed that daytime rooftop temperature was closely related to rooftop spectral attributes, aspect, slope, and surrounding trees. Night time temperature was only influenced by rooftop spectral attributes and slope.

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“…Apesar de os parques conseguirem diminuir as temperaturas na sua proximidade (SANTAMOURIS, 2001;DIMOUDI & NIKOLOPOULOU, 2003;BRUSE & FLEER, 1998;GIRIDHARAM et al, 2004), eles são termicamente incapazes de afetar os espaços com adensamento construtivo onde as pessoas vivem, trabalham e passam a maior parte de sua vida. Os telhados verdes são uma importante ferramenta de planejamento que pode ser usada para ajudar os centros urbanos face às alterações climáticas e melhorar a qualidade de vida nas cidades.…”

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Interferência Microclimática Na Utilização Do Telhado Verde Para Regiões Tropicais: Estudo De Caso Em Cuiabá, Mt

Rosseti

Nogueira

2013

REGET

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RESUMOEste artigo tem por objetivo geral avaliar a interferência da cobertura vegetada no micro clima do ambiente construído, analisando seu potencial na modificação dos valores de temperatura e umidade relativa do ar do entorno da edificação. Para isso foi utilizado um protótipo de 5m², construído com tijolo de oito furos, reboco e cobertura de fibrocimento, no qual foi instalada a cobertura vegetada. O protótipo foi monitorado durante 15 dias consecutivos da estação do verão e do inverno, no período compreendido entre os dias 05 e 20 de fevereiro (verão) e 06 e 20 de julho (inverno), no ano de 2009. Foram coletados simultaneamente dados de umidade relativa e temperatura do ar no entorno próximo ao protótipo e em um local afastado, ambos apresentando as mesmas características morfológicas. A partir dos resultados encontrados concluiu-se que os efeitos da cobertura verde no microclima estão intimamente associados a presença de água na cobertura.Palavras-chave: Cobertura vegetada, Conforto ambiental, Sustentabilidade, Clima urbano. MICROCLIMATIC INTERFERENCE USING THE GREEN ROOF IN TROPICAL REGIONS, CASE STUDY IN CUIABÁ, MT ABSTRACTThis article aims to evaluating the interference of green roofs on microclimate of the built environment, analyzing their potential in modifying the values of temperature and relative humidity of the air surrounding the building. For this were used a prototype of 5m ², constructed of brick and cement, finished with plaster and roofed with fibre cement, where was installed the green roof. The prototype was monitored for 15 consecutive days of the summer and winter seasons, starting on

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Daytime urban heat island effect in high-rise and high-density residential developments in Hong Kong

Cited by 249 publications

References 9 publications

Spatio-temporal Assessment of Land Use/ Land Cover Dynamics and Urban Heat Island of Jaipur City using Satellite Data

Spatio-temporal Assessment of Land Use/ Land Cover Dynamics and Urban Heat Island of Jaipur City using Satellite Data

Rooftop Surface Temperature Analysis in an Urban Residential Environment

Interferência Microclimática Na Utilização Do Telhado Verde Para Regiões Tropicais: Estudo De Caso Em Cuiabá, Mt

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