Surface Urban Heat Island in Middle City: Spatial and Temporal Characteristics

Alves, Elis Dener Lima; Anjos, Max; Galvani, Emerson

doi:10.3390/urbansci4040054

Cited by 15 publications

(8 citation statements)

References 76 publications

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“…The association between LST, NDVI, and NDBI can provide crucial information for urban land managers and planners [19]. There is evidence that changes in LULC pattern has increased the frequency and intensity of surface urban heat island (SUHI) thereby impacting the quality of life [20]. Thus, quantification of UHI and LST will also help assess the impact on human health and environmental changes [21].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Urban Heat Island (UHI) Using Satellite Images in Densely Populated Cities of South Asia

Maharjan

Aryal

Shakya

et al. 2021

Earth

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Rapid Urbanization, and other anthropogenic activities, have amplified the change in land-use transition from green space to heat emission in built-up areas globally. As a result, there has been an increase in the land surface temperature (LST) causing the Urban Heat Island (UHI) effect, particularly in large cities. The UHI effect poses a serious risk to human health and well-being, magnified in large developing cities with limited resources to cope with such issues. This study focuses on understanding the UHI effect in Kathmandu Valley (KV), Delhi, and Dhaka, three growing cities in South Asia. The UHI effect was evaluated by analyzing the UHI intensity of the city with respect to the surroundings. We found that the central urban area, of all three cities, experienced more heat zones compared to the peri-urban areas. The estimated average surface temperature ranged from 21.1 ∘C in March 2014 to 32.0 ∘C in June 2015 in KV, while Delhi and Dhaka experienced surface temperature variation from 29.7 ∘C in June 2017 to 40.2 ∘C in June 2019 and 23.6 ∘C in March 2017 to 33.2 ∘C in March 2014, respectively. Based on magnitude and variation of LST, highly built-up central KV showed heat island characteristics. In both Delhi and Dhaka, the western regions showed the UHI effect. Overall, this study finds that the UHI zones are more concentrated near the urban business centers with high population density. The results suggest that most areas in these cities have a rising LST trend and are on the verge of being UHI regions. Therefore, it is essential that further detailed assessment is conducted to understand and abate the impact of the temperature variations.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Urban Heat Island (UHI) Using Satellite Images in Densely Populated Cities of South Asia

Maharjan

Aryal

Shakya

et al. 2021

Earth

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“…(2) Annual LST data was utilized to analyze SUHI effect in this research. However, SUHI effect has significant diurnal and seasonal variations [ 86 ]. Ignoring these variations may introduce some uncertainty to the conclusions of this research.…”

Section: Discussionmentioning

confidence: 99%

Contrary to expectation: The surface urban heat island intensity is increasing in population shrinking region while decreasing in population growing region-A comparative analysis from China

Liu,

Zhang

2024

PLoS ONE

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Exploring the complex relationship between population change and surface urban heat island (SUHI) effect has important practical significance for the ecological transformation development of shrinking cities in the context of the prevalence of urban shrinkage and the global climate change. This paper compares the population change and SUHI effect between population shrinking region (Northeast Region, NR) and population growing region (Yangtze River Delta, YRD) in China, and explores their differences in driving mechanisms, using GIS spatial analysis and Geodetector model. Our results indicated that there are significant differences in population changes and SUHI intensity between these two regions. About 72.22% of the cities in the NR were shrinking, while their SUHI intensities increased by an average of 1.69°C. On the contrary, the urban population in the YRD shows a linear growth trend, while their SUHI intensities decreased by 0.11°C on average. The results of bivariate Moran’s I index also indicated that the spatial correlation between the urban population changes and the SUHI intensity changes are not significant in the above regions. Furthermore, there are significant differences in the primary drivers of SUHI variations between these two regions. In the NR, underlying surface changes, including the changes of green coverage and built-up areas, are the most important driving factors. However, atmospheric environment changes, such as carbon dioxide emission and sulfur dioxide emission, are the key drivers in the YRD. Northam’s theory of three-stage urbanization and environmental Kuznets curve hypothesis are powerful to explain these differences.

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“…Increased cooling demand for buildings transfers excess heat and humidity to the outside air leading to both increased heat and increased perception of heat in urban areas, which can threaten the health of inhabitants. Rapid urbanisation increases the extent and density of built-up areas (Du et al, 2017), and the loss of evapotranspiration cooling from vegetation, water bodies and natural areas further exacerbates the UHI (Alves et al, 2020). Vegetation cover has a direct effect on the local heat balance as the evapotranspiration process in plants absorbs the heat from the atmosphere to evaporate the water and shading directly reduces surface temperatures (Duveiller et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Past and Future Impacts of Urbanisation on Land Surface Temperature in Greater Cairo Over a 45 Year Period

et al. 2022

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Surface Urban Heat Island in Middle City: Spatial and Temporal Characteristics

Cited by 15 publications

References 76 publications

Evaluation of Urban Heat Island (UHI) Using Satellite Images in Densely Populated Cities of South Asia

Evaluation of Urban Heat Island (UHI) Using Satellite Images in Densely Populated Cities of South Asia

Contrary to expectation: The surface urban heat island intensity is increasing in population shrinking region while decreasing in population growing region-A comparative analysis from China

Past and Future Impacts of Urbanisation on Land Surface Temperature in Greater Cairo Over a 45 Year Period

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