Prediction of pollution dispersion under urban heat island circulation for different atmospheric stratification

Abbassi, Yasser; Ahmadikia, Hossein; Baniasadi, Ehsan

doi:10.1016/j.buildenv.2019.106374

Cited by 27 publications

(10 citation statements)

References 33 publications

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“…), would be of great interest in order to explore their impact on urban heat environment. In addition, we believe the urban 3D compact model could be considered in many other areas of research, such as the urban 3D compact form influencing urban atmospheric pollution transfer [77]. It is also important to provide scientific guidance for climate response urban planning in cities in terms of different latitudes and climatic backgrounds, promoting a healthier and more sustainable urban habitat.…”

Section: Discussionmentioning

confidence: 99%

The Challenge of the Urban Compact Form: Three-Dimensional Index Construction and Urban Land Surface Temperature Impacts

et al. 2021

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Cities are growing higher and denser, and understanding and constructing the compact city form is of great importance to optimize sustainable urbanization. The two-dimensional (2D) urban compact form has been widely studied by previous researchers, while the driving mechanism of three-dimensional (3D) compact morphology, which reflects the reality of the urban environment has seldom been developed. In this study, land surface temperature (LST) was retrieved by using the mono-window algorithm method based on Landsat 8 images of Xiamen in South China, which were acquired respectively on 14 April, 15 August, 2 October, and 21 December in 2017, and 11 March in 2018. We then aimed to explore the driving mechanism of the 3D compact form on the urban heat environment (UHE) based on our developed 3D Compactness Index (VCI) and remote sensing, as well as Geo-Detector techniques. The results show that the 3D compact form can positively effect UHE better than individual urban form construction elements, as can the combination of the 2D compact form with building height. Individually, building density had a greater effect on UHE than that of building height. At the same time, an integration of building density and height showed an enhanced inter-effect on UHE. Moreover, we explore the temporal and spatial UHE heterogeneity with regards to 3D compact form across different seasons. We also investigate the UHE impacts discrepancy caused by different 3D compactness categories. This shows that increasing the 3D compactness of an urban community from 0.016 to 0.323 would increase the heat accumulation, which was, in terms of satellite derived LST, by 1.35 °C, suggesting that higher compact forms strengthen UHE. This study highlights the challenge of the urban 3D compact form in respect of its UHE impact. The related evaluation in this study would help shed light on urban form optimization.

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Section: Discussionmentioning

confidence: 99%

The Challenge of the Urban Compact Form: Three-Dimensional Index Construction and Urban Land Surface Temperature Impacts

et al. 2021

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“…Higher temperatures in urban areas increase the energy consumption for building cooling and influences the energy layout [ 5 , 6 ], contributing much to global warming [ 7 ]. More anthropogenic heat and pollutants are released into the atmosphere from industries and energy plants, which intensifies the UHI effect and raises the air pollution level in urban areas [ 8 ]. As reported, the air pollutant concentration in urban areas was approximately 10 times that in a clean environment [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Detecting the Cool Island Effect of Urban Parks in Wuhan: A City on Rivers

Xie

2020

IJERPH

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As a nature-based solution, development of urban blue-green spaces is widely accepted for mitigating the urban heat island (UHI) effect. It is of great significance to determine the main driving factors of the park cool island (PCI) effect for optimizing park layout and achieving a maximum cooling benefit of urban parks. However, there have been obviously controversial conclusions in previous studies due to varied case contexts. This study was conducted in Wuhan, a city with high water coverage, which has significant differences in context with the previous case cities. The PCI intensity and its correlation with park characteristics were investigated based on remote sensing data. The results indicated that 36 out of 40 urban parks expressed a PCI effect, with a PCI intensity of 0.08~7.29 °C. As expected, larger parks with enough width had stronger PCI intensity. An increased density of hardened elements in a park could significantly weaken PCI effect. Noticeably, in this study, water bodies in a park contributed the most to the PCI effect of urban parks, while the vegetated areas showed a negative impact on the PCI intensity. It implied that in a context with higher water coverage, the cooling effect of vegetation was weakened or even masked by water bodies, due to the interaction effect of different variables on PCI intensity.

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“…This is caused by the increase in solar radiation absorbed by the building materials [7,8]. The UHI phenomenon increases the cooling in urban areas [9,10], which implies higher energy consumption that leads to an increase in pollutant levels in the urban context [11,12]. Xie et al [13] studied the correlation between the UHI and the land use/land cover ratio from 1987 to 2016 in Wuhan, China, finding that high temperatures were concentrated in construction land.…”

Section: Introductionmentioning

confidence: 99%

Urban Overheating Impact: A Case Study on Building Energy Performance

2021

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It is well known that the construction sector is one of the main sectors responsible for energy consumption in the current global energy scenario. Thus, buildings’ energy software become essential tools for achieving energy savings. Climate and its implications for building energy performance are a critical threat. Hence, the aim of this study is to evaluate the climatic conditions in urban and suburban areas of Rome, estimating the incidence of the Urban Heat Island (UHI) phenomenon. To this end, meteorological data obtained from three different areas (two airports and one inside the city) were examined and compared. Then, TRNSYS software was used to create a simple building, in order to assess the impacts of various climatic situations on building energy performance. The study revealed significant percentage differences both in terms of energy needs for heating, from −20.1% to −24.9% when the reference stations are, respectively, Fiumicino and Ciampino, and for cooling, with a wider range, from +48.7% to +87.5% when the reference stations are Ciampino and Fiumicino. Therefore, the study showed the importance of more accurately selecting sets of climate values to be included in energy simulations.

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Prediction of pollution dispersion under urban heat island circulation for different atmospheric stratification

Cited by 27 publications

References 33 publications

The Challenge of the Urban Compact Form: Three-Dimensional Index Construction and Urban Land Surface Temperature Impacts

The Challenge of the Urban Compact Form: Three-Dimensional Index Construction and Urban Land Surface Temperature Impacts

Detecting the Cool Island Effect of Urban Parks in Wuhan: A City on Rivers

Urban Overheating Impact: A Case Study on Building Energy Performance

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