Evaluation of city-scale PALM model simulations and intra-urban thermal variability in Vienna, Austria using operational and crowdsourced data

IF 6 2区 工程技术 Q1 ENVIRONMENTAL SCIENCES
Maja Žuvela-Aloise, Claudia Hahn, B. Hollósi
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引用次数: 0

Abstract

The PALM model system for urban applications is used to simulate the spatio-temporal thermal variability under heat wave conditions in Vienna, Austria. Model simulations covering the city area and its surroundings with a spatial resolution of 20 m are performed for four consecutive clear-sky hot days in August 2022. The results for hourly air temperature are evaluated with data from conventional weather stations of professional monitoring networks and quality-controlled data from private weather stations of the company NETATMO. The observations show high intra-urban variability during daytime and distinct spatial patterns at night with higher air temperatures in densely built city centre and lower temperatures in surrounding low-density urban region with prevailing green areas. The model shows lower variability than the observations, but similar large-scale spatial patterns. Direct comparison with observational data indicates a good model performance with a high coefficient of determination (R2 > 0.85), low bias (0.2 °C – 0.4 °C) and a root mean squared error (RMSE) of 1.8 °C. Evaluation of intra-urban thermal variability based on classification per land use and land cover type shows a statistically significant air temperature difference between the built-up areas and high vegetation surfaces during the night of about 1 °C in the observation and about 2 °C simulated by the model.
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来源期刊
Urban Climate
Urban Climate Social Sciences-Urban Studies
CiteScore
9.70
自引率
9.40%
发文量
286
期刊介绍: Urban Climate serves the scientific and decision making communities with the publication of research on theory, science and applications relevant to understanding urban climatic conditions and change in relation to their geography and to demographic, socioeconomic, institutional, technological and environmental dynamics and global change. Targeted towards both disciplinary and interdisciplinary audiences, this journal publishes original research papers, comprehensive review articles, book reviews, and short communications on topics including, but not limited to, the following: Urban meteorology and climate[...] Urban environmental pollution[...] Adaptation to global change[...] Urban economic and social issues[...] Research Approaches[...]
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