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Heat exposure variations and mitigation in a densely populated neighborhood during a hot day: Towards a people-oriented approach to urban climate management

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    SYSNO ASEP0573792
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleHeat exposure variations and mitigation in a densely populated neighborhood during a hot day: Towards a people-oriented approach to urban climate management
    Author(s) Geletič, Jan (UIVT-O) RID, ORCID, SAI
    Lehnert, M. (CZ)
    Resler, Jaroslav (UIVT-O) SAI, RID, ORCID
    Krč, Pavel (UIVT-O) SAI, RID, ORCID
    Bureš, Martin (UIVT-O) SAI, ORCID
    Urban, Aleš (UFA-U) RID, ORCID
    Krayenhoff, E. S. (CA)
    Article number110564
    Source TitleBuilding and Environment. - : Elsevier - ISSN 0360-1323
    Roč. 242, 15 August 2023 (2023)
    Number of pages17 s.
    Publication formOnline - E
    Languageeng - English
    CountryGB - United Kingdom
    KeywordsUrban greenery ; Universal thermal climate index (UTCI) ; Thermal comfort ; Biometeorology ; PALM ; Pedestrian
    OECD categoryMeteorology and atmospheric sciences
    R&D ProjectsTO01000219 GA TA ČR - Technology Agency of the Czech Republic (TA ČR)
    Research Infrastructuree-INFRA CZ - 90140 - CESNET, zájmové sdružení právnických osob
    Method of publishingOpen access
    Institutional supportUIVT-O - RVO:67985807 ; UFA-U - RVO:68378289
    UT WOS001147283500001
    EID SCOPUS85164997416
    DOI10.1016/j.buildenv.2023.110564
    AnnotationClimate change and increasing urbanization call for the effective adaptation of cities to extreme heat. To improve the applicability of the research, sophisticated computational fluid dynamics models are being developed to capture the complexity of climate in a real urban environment, while a human-oriented paradigm is emerging concurrently. In this paper we present a synergy of these approaches by analyzing outdoor thermal exposure on five different pedestrian routes in Prague-Dejvice (Czech Republic), employing the PALM modeling system and realistic use-cases. Our simulations reveal important spatio-temporal variability in the Universal Thermal Climate Index (UTCI) in the urban neighborhood. Our findings particularly emphasize the negative effect of open spaces, such as gaps between buildings and shorter buildings, on the thermal exposure of pedestrians. These configurations allow more direct irradiation to reach ground level, while the other adverse climatic characteristics of midrise/highrise developments are largely preserved. The effect of urban greenery is quite variable during the day. Trees can reduce UTCI by up to 10 °C, but this strongly depends on the location (e.g., distance from neighboring buildings). Irrigated grass reduces UTCI by about 1.8 °C, but dried grass has little heat mitigation effect. In conclusion, our results suggest that expert-based knowledge together with sophisticated and fine-scale models can identify effective heat stress reduction measures without draconian changes to, or investments in, the urban environment.
    WorkplaceInstitute of Computer Science
    ContactTereza Šírová, sirova@cs.cas.cz, Tel.: 266 053 800
    Year of Publishing2024
    Electronic addresshttps://dx.doi.org/10.1016/j.buildenv.2023.110564
Number of the records: 1  

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