Analyzing the heat island magnitude and characteristics in one hundred Asian and Australian cities and regions

Santamouris, M.

doi:10.1016/j.scitotenv.2015.01.060

Cited by 390 publications

(181 citation statements)

References 120 publications

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“…The presence of cool islands in the city was reported in several urban climate studies [50]. However, a recent study analyzed UHI and their characteristics, in Asian and Australian cities and regions shows an important emergence of daytime cool islands in some cities [105]. Cooler areas were observed in four Asian cities (Beijing, Kuala Lumpur, Seoul and Singapore), and two Australian cities (Adelaide and Melbourne) [105].…”

Section: Spatio-temporal Evolution Of Suhii In Summermentioning

confidence: 94%

Effects of Urbanization and Seasonal Cycle on the Surface Urban Heat Island Patterns in the Coastal Growing Cities: A Case Study of Casablanca, Morocco

et al. 2016

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Abstract:The urban heat island (UHI) phenomenon is a harmful environmental problem in urban areas affecting both climatic and ecological processes. This paper aims to highlight and monitor the spatial distribution of Surface UHI (SUHI) in the Casablanca region, Morocco, using remote sensing data. To achieve this goal, a time series of Landsat TM/ETM+/OLI-TIRS images was acquired from 1984 to 2016 and analyzed. In addition, nocturnal MODIS images acquired from 2005 to 2015 were used to evaluate the nighttime SUHI. In order to better analyze intense heat produced by urban core, SUHI intensity (SUHII) was computed by quantifying the difference of land surface temperature (LST) between urban and rural areas. The urban core SUHII appears more significant in winter seasons than during summer, while the pattern of SUHII becomes moderate during intermediate seasons. During winter, the average daytime SUHII gradually increased in the residential area of Casablanca and in some small peri-urban cities by more than 1 • C from 1984 to 2015. The industrial areas of the Casablanca region were affected by a significant rise in SUHII exceeding 15 • C in certain industrial localities. In contrast, daytime SUHII shows a reciprocal effect during summer with emergence of a heat island in rural areas and development of cool islands in urban and peri-urban areas. During nighttime, the SUHII remains positive in urban areas year-round with higher values in winter as compared to summer. The results point out that the seasonal cycle of daytime SUHII as observed in the Casablanca region is different from other mid-latitude cities, where the highest values are often observed in summer during the day.

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Section: Spatio-temporal Evolution Of Suhii In Summermentioning

confidence: 94%

Effects of Urbanization and Seasonal Cycle on the Surface Urban Heat Island Patterns in the Coastal Growing Cities: A Case Study of Casablanca, Morocco

et al. 2016

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“…An UHI can be present at any latitude, may occur during the day or night and can be detected in any season as a function of the local thermal balance. It is more intense on calm and clear days and it is highly aff ected by wind and precipitation (Santamouris, M. 2015;Akbari, H. et al 2016).…”

Section: Detection Of Atmospheric Urban Heat Island Through Direct Mementioning

confidence: 99%

Detection of atmospheric urban heat island through direct measurements in Cluj-Napoca city, Romania

et al. 2016

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In the last decades, cities worldwide have experienced accelerated development, so that continuous urbanization and its impact is presently one of the most important topics in diff erent fi elds of research. The main aim of this study is to identify the intensity of the atmospheric urban heat island in Cluj-Napoca city, through direct observations campaigns by using fi xed points and transect measurements. The data has been collected over a period of 6 months (May-October 2015). The measurements have been performed mainly in anti-cyclonic weather condition, during the night, between 23:00 and 03:00. The profi les trajectories followed the main roads of the city on directions North-South, East-West, and Northwest-Southeast. 8 fi xed points have been chosen in order to highlight best the temperature patt erns in diff erent Local Climate Zones (LCZs). The main fi ndings of the study are the followings: the direct observations performed in three seasons (spring, summer and autumn) revealed the existence of an atmospheric urban heat island in Cluj-Napoca city; the warmest areas are compact high-rise and compact midrise, located in the eastern half of the city, where the temperature increases by more than 2.0 °C, as average value for all campaigns, but the maximum values, recorded in the summer are higher than 3.0 °C; the coolest areas are sparsely built areas and the large low-rise/water areas, where the temperature is quite similar to that recorded in the nearby rural areas (diff erence of 0.0-0.1 °C, as average values); local factors, such as mountain breeze and topography have a great impact on the atmospheric urban heat island confi guration.

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“…According to recent studies, the presence of UHI is recognized in more than 400 cities around the world [1,2], The UHI refers to a higher ambient temperatures in dense urban zones compared to the surrounding suburban or rural areas. The development of the UHI is influenced by the synoptic weather conditions in the area, the local morphological and structural parameters of the city, the thermal quality of the materials used, the magnitude of the anthropogenic heat released, and the presence of heat sources and sinks in the cities [3].…”

Section: Introductionmentioning

confidence: 99%

Urban Heat Island and Overheating Characteristics in Sydney, Australia. An Analysis of Multiyear Measurements

et al. 2017

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It has become increasingly important to study the urban heat island phenomenon due to the adverse effects on summertime cooling energy demand, air and water quality and most importantly, heat-related illness and mortality. The present article analyses the magnitude and the characteristics of the urban heat island in Sydney, Australia. Climatic data from six meteorological stations distributed around the greater Sydney region and covering a period of 10 years are used. It is found that both strong urban heat island (UHI) and oasis phenomena are developed. The average maximum magnitude of the phenomena may exceed 6 K. The intensity and the characteristics of the phenomena are strongly influenced by the synoptic weather conditions and in particular the development of the sea breeze and the westerly winds from the desert area. The magnitude of the urban heat island varies between 0 and 11 • C, as a function of the prevailing weather conditions. The urban heat island mainly develops during the warm summer season while the oasis phenomenon is stronger during the winter and intermediate seasons. Using data from an extended network of stations the distribution of Cooling Degree Days in the greater Sydney area is calculated. It is found that because of the intense development of the UHI, Cooling Degree Days in Western Sydney are about three times higher than in the Eastern coastal zone. The present study will help us to better design and implement urban mitigation strategies to counterbalance the impact of the urban heat island in the city.

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Analyzing the heat island magnitude and characteristics in one hundred Asian and Australian cities and regions

Cited by 390 publications

References 120 publications

Effects of Urbanization and Seasonal Cycle on the Surface Urban Heat Island Patterns in the Coastal Growing Cities: A Case Study of Casablanca, Morocco

Effects of Urbanization and Seasonal Cycle on the Surface Urban Heat Island Patterns in the Coastal Growing Cities: A Case Study of Casablanca, Morocco

Detection of atmospheric urban heat island through direct measurements in Cluj-Napoca city, Romania

Urban Heat Island and Overheating Characteristics in Sydney, Australia. An Analysis of Multiyear Measurements

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