Urban fragmentation approach for assessing thermal environment dynamics: A case study of semi-arid city from a comfort perspective

Patle, Sheewani; Ghuge, Vidya V.

doi:10.1016/j.uclim.2023.101784

Cited by 4 publications

(2 citation statements)

References 128 publications

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“…Equation (3) of Pearson correlation coefficient (r) was considered to carry out a correlation [69][70][71][72] of the WBGT, SET, PT, PET and mPET indices with the UTCI index:…”

Section: Correlation Coefficientmentioning

confidence: 99%

Assessment of Outdoor Thermal Comfort in a Hot Summer Region of Europe

Sánchez Jiménez,

Ruiz de Adana

2024

Atmosphere

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Heat waves are increasingly frequent in Europe, especially in South European countries during the summer season. The intensity and frequency of these heat waves have increased significantly in recent years. Spain, as one of the southern European countries most affected by these recurring heat waves, particularly experiences this phenomenon in touristic cities such as Cordoba. The aim of this study was to perform an experimental assessment of outdoor thermal comfort in a typical three-hour tourist walkable path of the historical center of Cordoba. The experimental study was carried out in the three-hour period of higher temperatures from 16:30 to 19:30 h CEST (UTC+2) on a normal summer day (6 July 2023), a day with a heat wave (28 June 2023) and a day with a higher heat intensity, called a super heat wave (10 August 2023). Environmental conditions such as a radiant temperature, ambient temperature, wet bulb temperature, air velocity and relative humidity were measured at three different heights corresponding to 0.1 (ankles), 0.7 (abdomen) and 1.7 (head) m. The results show extremely high levels of heat stress in all bioclimatic indices throughout the route. Cumulative heat stress ranged from “very hot” conditions at the beginning of the route to becoming “highly sweltering” at the end of the route. The average temperature excess over the thermal comfort threshold was very high and increased with the heat intensity. In addition, a correlation analysis was carried out between the bioclimatic indices studied, with the UTCI index standing out for its strong correlation with other thermal comfort indices. The findings emphasize the need for interventions to improve the urban environment and promote better outdoor thermal comfort for city dwellers through measures such as green infrastructure, UHI mitigation and increasing public awareness.

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“…Equation (3) of Pearson correlation coefficient (r) was considered to carry out a correlation [69][70][71][72] of the WBGT, SET, PT, PET and mPET indices with the UTCI index:…”

Section: Correlation Coefficientmentioning

confidence: 99%

Assessment of Outdoor Thermal Comfort in a Hot Summer Region of Europe

Sánchez Jiménez,

Ruiz de Adana

2024

Atmosphere

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“…The surface temperatures reflected by different media of urban impervious surfaces vary (Yuan et al, 2018), different land cover types exhibit varying thermal responses to LST (Fuladlu, 2022;Patle and Ghuge, 2024). The area changes of impervious surface can reflect the spatial and temporal processes of urban heat islands (Hua et al, 2020) and can be used as an indicator to quantify the urban surface heat island (Coseo and Larsen, 2019;Shi et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Influence of color steel buildings on urban land surface temperature: a case study in Urumqi, Xinjiang, China

Li,

Yang,

Luo

et al. 2024

Front. Environ. Sci.

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Introduction: Highly clustered color steel buildings (CSB) have become new impervious surfaces and heat island areas in cities due to their materials, especially in the Northwest. However, the extent of the influence of CSB on land surface temperature (LST) and how they are quantitatively related to each other have not been explored.Methods: Therefore, this paper takes Urumqi city, which is densely populated with CSB and has a unique topography, as an example. We obtained LST data and CSB data based on Landsat and Google Earth images, and quantitatively analyzed the warming effect of the CSB on the urban LST and the characteristics of regional variability.Results and discussion: The results of the study showed that from 2005 to 2020, the scale of CSB in Urumqi City has been expanding, with high-density aggregation shifting from urban areas to the suburbs. The urban area of Urumqi city shows a “cool island effect”, with higher temperatures in CSB. The high-density distribution of CSB roughly coincides with the high temperature areas of the city. The density of CSB is highly positively correlated with LST, with the correlation coefficient reaching 0.973 in 2010. For every 0.2 increase in cluster density, the corresponding temperature can rise by 0.4°C. At the same density of aggregation, the average temperature of urban CSB is lower than that in the suburbs. The contribution index of suburban CSB to LST reaches 0.512, significantly higher than the surrounding other buildings, marked it one of the main contributors to the thermal environment in the suburbs.The research results can provide a reference and data support for the sustainable development and planning of cities.

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