High-Resolution Modelling of Thermal Exposure during a Hot Spell: A Case Study Using PALM-4U in Prague, Czech Republic

The modelling of thermal exposure in outdoor urban environments is a highly topical challenge modern climate research. This paper presents the results derived from new micrometeorological model that employs an integrated biometeorology module to Universal Thermal Climate Index (UTCI). PALM-4U, which includes human body-shape parameterization, deployed herein for pilot domain Prague, Czech Republic. highlight key role radiation spatiotemporal variability moderate-climate areas during summer days terms way this directly affects comfort through radiant temperature and indirectly complexity turbulence street canyons. simulations suggest highest may be expected within canyons near irradiated north sides east–west streets oriented north–south. Heat increases proximity buildings with reflective paints. lowest heat day anticipated tree-shaded courtyards. cooling effect trees range 4 °C 9 UTCI, grass comparison artificial paved surfaces open public places 2 5 UTCI. In general terms, study illustrates PALM system provides perspective on differentiation at pedestrian level; it therefore contribute more climate-sensitive planning.