Demographic disparity in diurnal surface urban Heat Island exposure across local climate zones: A case study of Chongqing, China

被引:9
作者
Ming, Yujia [1 ]
Liu, Yong [1 ]
Liu, Xue [2 ]
Tian, Zongshun [1 ]
机构
[1] Chongqing Univ, Sch Management Sci & Real Estate, Chongqing 400045, Peoples R China
[2] East China Normal Univ, Sch Geog Sci, Shanghai 200241, Peoples R China
基金
中国国家自然科学基金;
关键词
Surface urban heat island; Exposure risk; Local climate zones; Demographic groups; Mobile phone signaling data; ANTHROPOGENIC HEAT; TEMPERATURE; RISK; VULNERABILITY; HEALTH; SCALE; FORM; CITY; IMPACT; CITIES;
D O I
10.1016/j.scitotenv.2024.171203
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Surface urban heat island (SUHI) exposure significantly harms human health during rapid urbanization. Identifying the areas and demographic groups under high SUHI exposure is critical for mitigating heat-related hazards. However, despite broad concern in US-European countries, rare studies discuss the diurnal SUHI exposure of demographic subgroups across Local Climate Zones (LCZs) in Chinese cities. Therefore, taking Chongqing as the case study, we measured the diurnal SUHI exposure of demographic subgroups (e.g., gender, age, and income) across different LCZs (compact, open, and sparsely-built zones) by coupling the ECOSTRESS data and mobile phone signaling data. The results indicated that Chongqing's compact high/middle-rise zones suffered a higher SUHI exposure due to high land surface temperature (LST) and a larger size of population than open zones. Despite a relatively low population density, extremely high LST in compact low-rise zones (e.g., industrial parks) contributes to considerable accumulated SUHI exposure. The SUHI exposure risk exhibited the differences between daytime and nighttime, resulting from SUHI variation and population flow. The demographic analysis showed that Chongqing's demographic subgroups are exposed disproportionately to SUHI. Elderly groups suffered relatively high exposure in compact high-rise zones. Low-incomers witnessed a high exposure in open zones. These findings call for alleviating SUHI exposure risk by targeting vulnerable groups and high-intensity exposure areas.
引用
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页数:14
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