An Urban Surface Scheme for the Urban Microscale Model PALM-4U - Model Development and First Validation

Abstract

CONFERENCE: 10th International Conference on Urban Climate / 14th Symposium on the Urban Environment. 06.08.2018-10.08.2018, New York. SUPPORT: Project Urbi Pragensi (ICS CAS, CHMI, MFF CUNI Prague – Czech Republic). ABSTRACT: One major phenomenon related to the urban climate is the urban heat island (UHI), i.e. the fact that an urban area may be significantly warmer than its surrounding rural areas, which mainly appears during evening and early night hours (Oke, 1982). The higher temperature is linked to the absorption and retention of energy by urban surfaces and to anthropogenic heat emissions, which can cause urban-to-rural temperature differences of several degrees Celsius. Moreover, buildings and other urban components can locally decrease the ventilation (e.g. Letzel et al. 2012), thus adding to thermal discomfort.

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