Daytime in contrast to night-time effect of blue and green features on thermal exposure in moderate-climate cities

0576329 - ÚI 2024 RIV AU eng A - Abstract
Lehnert, M. - Květoňová, V. - Jurek, M. - Koukalová, A. - Geletič, Jan
Daytime in contrast to night-time effect of blue and green features on thermal exposure in moderate-climate cities.
11th International Conference on Urban Climate. Titles. Sydney: ICUC, 2023, č. článku 76..
[ICUC 2023: International Conference on Urban Climate /11./. 28.08.2023-01.09.2023, Sydney]
Grant - others:AV ČR(CZ) StrategieAV21/23
Institutional support: RVO:67985807
Keywords : UTCI * blue and green infrastructure * thermal exposure * thermal comfort
OECD category: Meteorology and atmospheric sciences
https://virtual.oxfordabstracts.com/#/event/3742/submission/76

ZÁKLADNÍ ÚDAJE: 11th International Conference on Urban Climate. Titles. Sydney: ICUC, 2023, č. článku 76. [ICUC 2023: International Conference on Urban Climate /11./. 28.08.2023-01.09.2023, Sydney]. ABSTRAKT: Manifestations and projections of future climate change require effective adaptation of the urban environment to heat extremes. Influence of blue and green features on temperature, or more comprehensively on thermal exposure, thermal comfort, and heat stress in urban areas, has been thoroughly investigated in recent years. We also conducted such studies during hot summer days, showing that trees in open public areas of Czech cities lead to a decrease in UTCI (Universal Thermal Climate Index) by 5.0–8.0°C compared to sunlit pavement, maintained lawns in open areas decrease UTCI by 0.0–2.0°C and fountains or misting systems in open areas of the city centre influence UTCI in the range of −2.5°C to +1.0°C. On hot summer nights, when heat extremes have a particularly pronounced negative effect on human health, available biometeorological data are mostly based on model simulations because on-site measurements are rather scarce. In this contribution, we present preliminary results of our recent on-site night-time measurement campaign in Czech cities. Our results show that trees increase UTCI in the extent of 0.3−2.0°C, depending on the character of the tree, whereas shading sails increase UTCI by about 0.5°C. The cooling or warming effect of blue elements during night-time strongly depends on the character of the fountains, spray fountains, and misting systems. More detailed analyses including PET (Physiological Equivalent Temperature) are coming.
Permanent Link: https://hdl.handle.net/11104/0345891