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

0572673 - ÚI 2024 RIV US eng A - Abstrakt
Belda, M. - Resler, Jaroslav - Geletič, Jan - Krč, Pavel - Maronga, B. - Sühring, M. - Kurppa, M. - Kanani-Sühring, F. - Fuka, V. - Eben, Kryštof - Benešová, N.
Simple and complex measures for improvement of urban thermal comfort: an LES modeling study.
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]
Grant CEP: GA TA ČR(CZ) TO01000219
Institucionální podpora: RVO:67985807
Klíčová slova: sensitivity * biometeorology * large-eddy simulation * mitigation * PALM
Obor OECD: Meteorology and atmospheric sciences
https://biomet23.asu.edu/wp-content/uploads/sites/25/2023/05/ICB2023_Abstracts_MonMay15.pdf

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.
Trvalý link: https://hdl.handle.net/11104/0343281