Summer urban heat island mitigation strategy development for high-anthropogenic-heat-emission blocks

被引：37
作者：
Chen, Yuan [1 ]
Wang, Yupeng [1 ]
Zhou, Dian [1 ]
Gu, Zhaolin [1 ]
Meng, Xiangzhao [1 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian, Peoples R China
来源：
SUSTAINABLE CITIES AND SOCIETY | 2022年 / 87卷
关键词：
Urban heat island; Environmental evaluation; Mitigation strategy; Urban morphology; Anthropogenic heat emission; SKY VIEW FACTOR; SURFACE TEMPERATURES; THERMAL COMFORT; CLIMATE-CHANGE; CITY; ENVIRONMENT; IMPACTS;
D O I：
10.1016/j.scs.2022.104197
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The negative impacts of urban heat island (UHI) have attracted more and more academic attention. Currently, few studies have considered the effects of anthropogenic heat emission (AHE) in different urban districts. To explore the spatial and temporal differences in microclimate in high-AHE areas, five high-anthropogenic-heatemission blocks in Xi'an, China were selected, and the microclimatic indices of air temperature (AT) and relative humidity (RH) were measured in 33 urban points in the five typical urban blocks. Meanwhile, the urban morphological indices of 33 points were calculated in the 20 m and 50 m buffer areas (BAs). Results show that the green cover ratio (GCR), the impervious surface area ratio (ISAR), sky view factor (SVF) and reflectivity (REF) were important variables affecting microclimate. These indices explained up to 35% and 31% of the changes in AT and RH, respectively. In addition, the ISAR should be controlled within 44% and the REF should be controlled above 21.5%, in order to ensure that the maximum AT remained less than 37 degrees C (high-temperature orange warning) inside the block on a typical summer day. This study improves the prediction method of high summer temperatures in high-AHE blocks and provides hints for developing UHI mitigation strategies.
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页数：12
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