Key Parameters for Urban Heat Island Assessment in A Mediterranean Context: A Sensitivity Analysis Using the Urban Weather Generator Model

World Multidisciplinary Civil Engineering-Architecture-Urban Planning Symposium - WMCAUS

土木建筑工程

Salvati, Agnese^1,2 ; Palme, Massimo^3 ; Inostroza, Luis^4,5

Sapienza University of Rome, DICEA Department, Roma, Italy^1

Polytechnic University of Catalunya, School of Architecture of Barcelona, Spain^2

School of Architecture, Catholic University of the North, Antofagasta, Chile^3

Institute of Geography, Ruhr-Universität Bochum, Bochum, Germany^4

Universidad Autonoma de Chile, Chile^5

关键词: Anthropogenic heat;    Anthropogenic sources;    Cooling set-points;    Horizontal surfaces;    Physical phenomena;    Urban heat island assessment;    Wall construction;    Weather generator;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/8/082055/pdf
DOI  :  10.1088/1757-899X/245/8/082055

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

Although Urban Heat Island (UHI) is a fundamental effect modifying the urban climate, being widely studied, the relative weight of the parameters involved in its generation is still not clear. This paper investigates the hierarchy of importance of eight parameters responsible for UHI intensity in the Mediterranean context. Sensitivity analyses have been carried out using the Urban Weather Generator model, considering the range of variability of: 1) city radius, 2) urban morphology, 3) tree coverage, 4) anthropogenic heat from vehicles, 5) building's cooling set point, 6) heat released to canyon from HVAC systems, 7) wall construction properties and 8) albedo of vertical and horizontal surfaces. Results show a clear hierarchy of significance among the considered parameters; the urban morphology is the most important variable, causing a relative change up to 120% of the annual average UHI intensity in the Mediterranean context. The impact of anthropogenic sources of heat such as cooling systems and vehicles is also significant. These results suggest that urban morphology parameters can be used as descriptors of the climatic performance of different urban areas, easing the work of urban planners and designers in understanding a complex physical phenomenon, such as the UHI.