The case of Tehran's urban heat island, Iran: Impacts of urban 'lockdown' associated with the COVID-19 pandemic

被引:21
|
作者
Roshan, Gholamreza [1 ]
Sarli, Reza [1 ]
Grab, Stefan W. [2 ]
机构
[1] Golestan Univ, Dept Geog, Shahid Beheshti, Gorgan 4913815759, Iran
[2] Univ Witwatersrand, Sch Geog Archaeol & Environm, Private Bag 3,Wits, ZA-2050 Johannesburg, Cote Ivoire
关键词
COVID-19; pandemic; Urban heat island; Temperature departures; Tehran metropolis; CLIMATE ZONE CLASSIFICATION; LOCAL CLIMATE; SPRAWL; PRECIPITATION; TEMPERATURE; POPULATION; MODELS; COVER;
D O I
10.1016/j.scs.2021.103263
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The increasing expansion of urban environments with associated transformation of land-cover has led to the formation of urban heat islands (UHI) in many urbanized regions worldwide. COVID-19 related environmental impacts, through reduced urban activities, is worthy of investigation as it may demonstrate human capacity to manage UHI. We aim to establish the thermal impacts associated with COVID-19 induced urban 'lockdown' from 20 March to 20 April 2020 over Tehran. Areal changes in UHI are assessed through Classification and Regression Trees (CART), measured against background synoptic scale temperature changes over the years 1950-2020. Results indicate that monthly Tmean, Tmax and Tmin values during this time were considerably lower than longterm mean values for the reference period. Although the COVID-19 initiated shutdown led to an identifiable temperature anomaly, we demonstrate that this is not a product of upper atmospheric or synoptic conditions alone. We also show that the cooling effect over Tehran was not spatially uniform, which is likely due to the complexity of land uses such as industrial as opposed to residential. Our findings provide potentially valuable insights and implications for future management of urban heat islands during extreme heat waves that pose a serious threat to human health.
引用
收藏
页数:18
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