Simple and complex measures for improvement of urban thermal comfort: an LES modeling study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985807%3A_____%2F23%3A00572673" target="_blank" >RIV/67985807:_____/23:00572673 - isvavai.cz</a>

Výsledek na webu

<a href="https://biomet23.asu.edu/wp-content/uploads/sites/25/2023/05/ICB2023_Abstracts_MonMay15.pdf" target="_blank" >https://biomet23.asu.edu/wp-content/uploads/sites/25/2023/05/ICB2023_Abstracts_MonMay15.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Simple and complex measures for improvement of urban thermal comfort: an LES modeling study

Popis výsledku v původním jazyce

ZÁKLADNÍ ÚDAJE: 23rd International Congress of Biometeorology - Abstract Book – Monday, May 15. Tempe: Arizona State University / International Congress of Biometeorology, 2023. s. 12-12. [International Congress of Biometeorology /23./. 14.05.2023-17.05.2023, Tempe]. ABSTRAKT: Thermal comfort of city dwellers is at the forefront of the urban studies especially in connection with climate change. Urban planners are considering various measures to improve thermal comfort in the cities, ranging from very simple (like painting surfaces bright to reflect more solar radiation) to very complex (changing the entire urban configurations with more green and blue infrastructure). In this study a complex micro-scale modeling system PALM featuring an advanced urban model was used to analyze micro-climate sensitivity with respect to potential UHI mitigation measures in a densely built-up typical residential area in Prague, Czech Republic. The use of an integrated modeling system allowed the analysis of the effects both on physical variables and biometeorological indicators or indices (MRT, PET or UTCI).. Two types of scenario simulations were designed. First, a set of simple scenarios was performed, changing individual surface and material parameters such as albedo or emissivity. These showed the highest sensitivity to changes of surface parameters used in radiation balance equations. Second, a set of scenarios was designed to assess the limits of effects of commonly considered complex UHI mitigation measures such as adding tree alleys or introducing water channels in the streets. In this case, urban greenery is confirmed to be the most effective measure, especially when considering both physical indicators and biometeorological indices. Comparing the two sets showed that the simple measures are not as effective and in some cases can lead to adverse effects, e.g. painting surfaces white lead to a decrease of air temperature but at the same time worse thermal comfort at the pedestrian level due to more radiation being reflected back to the street canyon.

Název v anglickém jazyce

Simple and complex measures for improvement of urban thermal comfort: an LES modeling study

Popis výsledku anglicky

ZÁKLADNÍ ÚDAJE: 23rd International Congress of Biometeorology - Abstract Book – Monday, May 15. Tempe: Arizona State University / International Congress of Biometeorology, 2023. s. 12-12. [International Congress of Biometeorology /23./. 14.05.2023-17.05.2023, Tempe]. ABSTRAKT: Thermal comfort of city dwellers is at the forefront of the urban studies especially in connection with climate change. Urban planners are considering various measures to improve thermal comfort in the cities, ranging from very simple (like painting surfaces bright to reflect more solar radiation) to very complex (changing the entire urban configurations with more green and blue infrastructure). In this study a complex micro-scale modeling system PALM featuring an advanced urban model was used to analyze micro-climate sensitivity with respect to potential UHI mitigation measures in a densely built-up typical residential area in Prague, Czech Republic. The use of an integrated modeling system allowed the analysis of the effects both on physical variables and biometeorological indicators or indices (MRT, PET or UTCI).. Two types of scenario simulations were designed. First, a set of simple scenarios was performed, changing individual surface and material parameters such as albedo or emissivity. These showed the highest sensitivity to changes of surface parameters used in radiation balance equations. Second, a set of scenarios was designed to assess the limits of effects of commonly considered complex UHI mitigation measures such as adding tree alleys or introducing water channels in the streets. In this case, urban greenery is confirmed to be the most effective measure, especially when considering both physical indicators and biometeorological indices. Comparing the two sets showed that the simple measures are not as effective and in some cases can lead to adverse effects, e.g. painting surfaces white lead to a decrease of air temperature but at the same time worse thermal comfort at the pedestrian level due to more radiation being reflected back to the street canyon.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

<a href="/cs/project/TO01000219" target="_blank" >TO01000219: Modelování kvality ovzduší a tepelného komfortu s rozlišenou turbulencí v městském prostředí</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů