Urban heat resilience at the time of global warming: evaluating the impact of the urban parks on outdoor thermal comfort

Aram, Farshid and Solgi, Ebrahim and Higueras García, Ester and Mosavi, Amir (2020). Urban heat resilience at the time of global warming: evaluating the impact of the urban parks on outdoor thermal comfort. "Environmental Sciences Europe", v. 32 (n. 1); ISSN 2190-4715. https://doi.org/10.1186/s12302-020-00393-8.

Description

Title: Urban heat resilience at the time of global warming: evaluating the impact of the urban parks on outdoor thermal comfort
Author/s:
  • Aram, Farshid
  • Solgi, Ebrahim
  • Higueras García, Ester
  • Mosavi, Amir
Item Type: Article
Título de Revista/Publicación: Environmental Sciences Europe
Date: 10 September 2020
ISSN: 2190-4715
Volume: 32
Subjects:
Faculty: E.T.S. Arquitectura (UPM)
Department: Urbanística y Ordenación del Territorio
Creative Commons Licenses: Recognition

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Abstract

Background In densely populated urban centers, increased air temperature due to urban heat island (UHI) effect can undermine the thermal comfort and health of citizens. Research has shown that large urban parks can mitigate the effect of UHIs and improve thermal comfort, especially in the warmer months of the year when temperature changes are more noticeable. This study investigated the cooling effect intensity (CEI) of the Retiro Park in the center of Madrid at three different distances from its southern edge and the impact of this cooling effect on thermal comfort from physiological and psychological perspectives. This investigation was performed by measuring microclimate data and conducting a survey simultaneously during the summer days. Results The results showed that the CEI of the park varies with distance from its edge. Because of this effect, air temperature within the 130 m and 280 m distance of the park was, respectively, 1.6 °C and 0.9 °C lower than the temperature at the 520 m distance (the nearest heat island). After examining the effect of the park in terms of physiological equivalent temperature (PET), it was found that the PET at the 130 m and 280 m distance of the park was 9.3% and 5.4% less than the PET in the heat island domain. More than 81% of the respondents (in all three areas) had a mental image of the park as the place where they would experience the highest level of outdoor thermal comfort, and this rate was higher in the areas closer to the park. The analysis of citizens’ responses about perceived thermal comfort (PTC) showed that citizens in areas with higher CEI had perceived a higher degree of thermal comfort from the psychological perspective. Conclusion This study demonstrates the significant role of large urban parks located in the core of the populated cities in providing thermal comfort for citizens from both physiological and psychological perspectives. Additionally, the results of this study demonstrated that among the environmental (natural and artificial) factors around the park (topography, urban structure, etc.), the aspect ratio has the greatest impact on thermal comfort.

More information

Item ID: 63796
DC Identifier: http://oa.upm.es/63796/
OAI Identifier: oai:oa.upm.es:63796
DOI: 10.1186/s12302-020-00393-8
Official URL: https://doi.org/10.1186/s12302-020-00393-8
Deposited by: Farshid Aram
Deposited on: 14 Sep 2020 15:47
Last Modified: 14 Sep 2020 15:47
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