Effects of Urban Heat Island mitigation in various climate zones in the United States

Kim, Hyoungsub; Gu, Donghwan; Kim, Hwan-Yong

doi:10.1016/j.scs.2018.06.021

Cited by 60 publications

(19 citation statements)

References 92 publications

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“…However, it has been demonstrated that the UWG simulations produced mesoscale UHIs following the assumption that the air in the UCL was well-mixed. For these reasons, the integration of microscale UHIs and thermal comfort simulations is necessary to increase the reliability of the analysis´ outcome as described in Kim et al (2018).…”

Section: Discussionmentioning

confidence: 99%

Thermal performance of the Urban Weather Generator model as a tool for planning sustainable urban development

Alchapar¹,

Pezzuto²,

Erica³

et al. 2019

Geographica Pannonica

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The research aims at assessing the sensitivity of the Urban Weather Generator v4.1 to the application of different mitigation strategies for the urban heat island under two climatic contexts: desert climate (Mendoza city) and tropical climate (Campinas city). Twenty-four scenarios that modify their morphologic and material parameters were simulated. The results showed that the temperature of the air predicted by the UWG model is not significantly sensitive to the changes produced by the application of different strategies in urban contexts of equal H/W aspect; however, it does show sensitivity to the variation of the H/W aspect (ΔTa ≤ 1.3°C) and the climate context. The highest performance of the UWG model was recorded on the surface temperatures of the urban envelope, with a maximum difference in surface temperature was recorded on high aspect ratio with high albedo in arid climate, (Ts of roof = 28°C).

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Section: Discussionmentioning

confidence: 99%

Thermal performance of the Urban Weather Generator model as a tool for planning sustainable urban development

Alchapar¹,

Pezzuto²,

Erica³

et al. 2019

Geographica Pannonica

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“…In summary, it is vital to introduce an assessment planning culture in the framework of climate change [115][116][117][118]. The control of urban expansion, the increase of green areas (including roofs and building façades) as well as the percentage of permeable soil, the modification of the albedo of materials and pavements (increasing the degree of reflection of incoming solar radiation), the integration of artificial water bodies, the promotion of urban ventilation, the layout of buildings and, in general, the composition of urban morphology in order to facilitate air circulation, generates urban canyons and eases temperatures [119].…”

Section: Discussionmentioning

confidence: 99%

Effect of Land Use/Cover Changes on Urban Cool Island Phenomenon in Seville, Spain

et al. 2020

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This paper analyses Seville’s surface urban heat island (SUHI) phenomenon, comparing spatial and temporal patterns of land surface temperature (LST) during July 1987, 2000 and 2017. Landsat data captured throughout three July months were analyzed for the different years, techniques of geographic information systems, ecological variables and geospatial approaches and used to carry out the analysis. The results indicate that from 1987 to 2017, the averaged LST has increased by 9.1 °C in the studied area. The urban areas are colder than their surroundings, suggesting the role of baresoil and cultivated land in the reversal of the SUHI phenomenon. The results show that a fraction of green space has a high unstandardized coefficient (β) through the three time periods. A decreasing trend is also observed in the standardized β “fraction of impervious surface” in the three time periods. The linear regression analysis shows a negative relationship of mean LST with impervious surface fraction due to the presence of shadows projected by buildings, and a positive relationship with green space fraction caused by the influence of baresoil and cultivated land that inverts the LST behavior pattern. The study concludes that there is a need to implement SUHI mitigation strategies during the initial phases of engineering projects where the origin of this problem can be acted upon, since the process of creating streets and public space offers a valuable opportunity to restore the environmental quality and diminish the effects generated by climate change.

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“…Finally, UHII mitigation [35], or its efficient release, is the goal of this study. By clarification of the significant changes and points regarding long-term observation (morphological changes and climate factors under rapid urbanization), urban blocks in major residential building classes (low rise, mid-rise, and high-rise buildings) [36] are carefully selected and studied and their heat balance carefully measured.…”

Section: Introductionmentioning

confidence: 99%

The Interactive Impact of Building Diversity on the Thermal Balance and Micro-Climate Change under the Influence of Rapid Urbanization

Makvandi

Elsadek

et al. 2019

Sustainability

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Numerous cities face the serious problems of rapid urbanization and climate change, especially in recent years. Among all cities, Wuhan is one of the most affected by these changes, accompanied by the transformation of water surfaces into urban lands and the decline of natural ventilation. This study investigated the impact of surface urban heat island enlargement (SUHI) and block morphology changes in heat balance. Accordingly, the interactive impact of building diversity with major building forms (low-rise, mid-rise, and high-rise) on thermal balance and microclimate changes under the influence of urban land expansion at the residential block scale was studied. To investigate the heat balance changes by air temperature intensification and air movement reduction, a long-term and field observational analysis (1980–2018) coupled with computational fluid dynamic simulation (CFD) was used to evaluate the impact of building diversity on thermal balance. Outcomes show that urban heat island intensity (UHII) increased by 2 ℃ when water surfaces in urban areas decreased; consequently, there was a deterioration in the air movement to alleviate UHII. Thus, the air movement declined substantially with UHII and SUHI enlargement, which, through increased urban surfaces and roughness length, will become worse by 2020. Furthermore, the decline in air movement caused by the transformation of urban water bodies cannot contribute to the heat balance unless reinforced by the morphology of the urban blocks. In the design of inner-city blocks, morphological indicators have a significant impact on microclimate and heat balance, where increasing building density and plot ratio will increase UHII, and increasing water surfaces will result in an increase in urban ventilation. Lastly, a substantial correlation between air temperature and relative humidity was found, which, together with the block indicators, can help control the air temperature and adjust the urban microclimate.

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Effects of Urban Heat Island mitigation in various climate zones in the United States

Cited by 60 publications

References 92 publications

Thermal performance of the Urban Weather Generator model as a tool for planning sustainable urban development

Thermal performance of the Urban Weather Generator model as a tool for planning sustainable urban development

Effect of Land Use/Cover Changes on Urban Cool Island Phenomenon in Seville, Spain

The Interactive Impact of Building Diversity on the Thermal Balance and Micro-Climate Change under the Influence of Rapid Urbanization

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