Impact of Urban Morphology on Urban Heat Island Intensity in the Beijing-Tianjin-Hebei Metropolitan Area
Zheng Zuofang
Yang Jie
Li Yinghua
Gao Hua
Abstract：Local climate zone(LCZ),as a new classification framework for studying urban heat islands(UHI),can quantify the complex relationship between urban morphology and thermal environ-ment.Based on the high-precision classification of underlying surfaces and the data of automatic weather stations(AWSs)from March 2019 to February 2020,the morphological compositions of four major cities in the Beijing-Tianjin-Hebei metropolitan area and their contribution to the UHI intensity(UHII)are an-alyzed in this study.The results show that:(1)The urban areas of Beijing,Tianjin,Tangshan and Baoding are respectively composed of 16,13,13 and 14 LCZ types,of which only 12,7,4 and 4 LCZ types have AWSs.In these four cities,the building underlying surfaces with the highest proportion of area are LCZ5,LCZ4,LCZ3,and LCZ3,respectively.(2)The UHII is not only related to the city scale,but also significantly influenced by geographical location.The annual average UHIIs of the four cities are ranked as Beijing>Baoding>Tianjin>Tangshan.(3)The UHII on the underlying surfaces with dense me-dium and high-rise buildings(such as LCZ1 and LCZ2)is generally strong,while the green underlying surfaces(such as LCZB)have relatively weak UHII.(4)The contribution rates of various LCZs to the UHII are relatively stable,with LCZ5(30.4%),LCZ5(34.8%),LCZ3(60.6%)and LCZ3(67.4%)contributing the most to the annual average UHII in Beijing,Tianjin,Tangshan and Baoding,respectively.
Keywords：local climate zone(LCZ)urban heat island effecturban morphological compositioncontribution ratethe Beijing-Tianjin-Hebei megalopolis
Publication Date：2025-11-30
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：8( 37-44 )