Global warming and urbanization triggering the record-breaking heat event in summer 2023 over Beijing-Tianjin-Hebei urban agglomeration, China

IF 6 2区工程技术 Q1 ENVIRONMENTAL SCIENCES

Urban Climate Pub Date : 2025-02-01 DOI:10.1016/j.uclim.2024.102271

Yujie Wang , Jisong Chen , Xin Lin , Lianchun Song

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引用次数: 0

Abstract

The summer of 2023 was characterized by record-breaking widespread heat with extensive impacts on agriculture, water supply, transportation and the socio-economy over Beijing-Tianjin-Hebei (BTH) urban agglomeration. Here, we present a timely, comprehensive, multi-faceted analysis of the 2023 extreme heat event based on six extreme heat indices(EHIs). Our findings indicate that the synergistic effect of global warming, urbanization and anomalous atmospheric circulation is the main cause for the occurrence of the record-breaking event. The EHIs have significantly increased during 1971–2023 over the urban agglomeration, especially since 21st century. The increasing magnitudes of EHIs in megacities (i.e., Beijing, Tianjin and Shijiazhuang) were much greater than in surrounding areas. The Urban Heat Island (UHI) effects contribute more than a half to the increase of EHIs. In addition, the intensified continental high-pressure and Western Pacific Subtropical High are favor to the occurrences of extreme heat event in the era of rapid global warming. With such record-breaking heat events becoming more frequent and intense under the rapid global warming and urbanization, we suggest that greening urban areas, designing cool rooftop and planning ventilation corridor could be the practical approaches to mitigate the UHI effect for climate change adaptation strategy.

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全球变暖和城市化引发2023年夏季京津冀城市群破纪录高温事件

2023年夏季，京津冀城市群出现了前所未有的大面积高温天气，对农业、供水、交通和社会经济产生了广泛影响。在此，我们基于六个极端热指数（EHIs）对2023年极端热事件进行了及时、全面、多方面的分析。研究结果表明，全球变暖、城市化和大气环流异常的协同作用是此次破纪录事件发生的主要原因。1971-2023年，城市群EHIs显著增加，尤其是21世纪以来。特大城市（北京、天津、石家庄）的EHIs增长幅度远大于周边地区。城市热岛效应对城市热岛效应的贡献率超过一半。此外，在全球快速变暖时期，大陆高压和西太平洋副热带高压的增强有利于极端高温事件的发生。随着全球气候变暖和城市化进程的加快，这种破纪录的高温事件变得越来越频繁和强烈，我们建议通过绿化城市区域、设计凉爽的屋顶和规划通风走廊来缓解城市热岛效应，以适应气候变化战略。

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来源期刊

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[...]