Quantifying the response of surface urban heat island to urban greening in global north megacities

2021 ◽  
pp. 149553
Author(s):  
Fengqi Cui ◽  
Rafiq Hamdi ◽  
Xiuliang Yuan ◽  
Huili He ◽  
Tao Yang ◽  
...  
Keyword(s):  
Urban Heat Island ◽  
Heat Island ◽  
Urban Greening ◽  
Global North ◽  
Urban Heat ◽  
Surface Urban Heat Island

scholarly journals Crowdsourced air temperatures contrast satellite measures of the urban heat island and its mechanisms

2021 ◽  
Vol 7 (22) ◽  
pp. eabb9569
Author(s):  
Zander S. Venter ◽  
Tirthankar Chakraborty ◽  
Xuhui Lee
Keyword(s):  
Urban Heat Island ◽  
Satellite Data ◽  
Heat Island ◽  
Urban Greening ◽  
Air Temperatures ◽  
Time Period ◽  
Urban Heat ◽  
Surface Urban Heat Island ◽  
Heat Risk ◽  
Aerodynamic Roughness

The ubiquitous nature of satellite data has led to an explosion of studies on the surface urban heat island (SUHI). Relatively few have simultaneously used air temperature measurements to compare SUHI with the canopy UHI (CUHI), which is more relevant to public health. Using crowdsourced citizen weather stations (>50,000) and satellite data over Europe, we estimate the CUHI and SUHI intensity in 342 urban clusters during the 2019 heat wave. Satellites produce a sixfold overestimate of UHI relative to station measurements (mean SUHI 1.45°C; CUHI 0.26°C), with SUHI exceeding CUHI in 96% of cities during daytime and in 80% at night. Using empirical evidence, we confirm the control of aerodynamic roughness on UHI intensity, but find evaporative cooling to have a stronger overall impact during this time period. Our results support urban greening as an effective UHI mitigation strategy and caution against relying on satellite data for urban heat risk assessments.

The impact of COVID-19 lockdowns on surface urban heat island changes and air-quality improvements across 21 major cities in the Middle East

2021 ◽  
pp. 117802
Author(s):  
Ahmed M. El Kenawy ◽  
Juan I. Lopez-Moreno ◽  
Matthew F. McCabe ◽  
Fernando Domínguez-Castro ◽  
Dhais Peña-Angulo ◽  
...  
Keyword(s):  
Air Quality ◽  
Middle East ◽  
Urban Heat Island ◽  
Heat Island ◽  
Quality Improvements ◽  
Urban Heat ◽  
Surface Urban Heat Island ◽  
The Impact

scholarly journals Disproportionate exposure to urban heat island intensity across major US cities

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Angel Hsu ◽  
Glenn Sheriff ◽  
Tirthankar Chakraborty ◽  
Diego Manya
Keyword(s):  
Urban Heat Island ◽  
Census Tract ◽  
Demographic Data ◽  
Heat Exposure ◽  
Poverty Line ◽  
Built Environments ◽  
Heat Island ◽  
Urban Heat ◽  
Surface Urban Heat Island ◽  
Us Cities

AbstractUrban heat stress poses a major risk to public health. Case studies of individual cities suggest that heat exposure, like other environmental stressors, may be unequally distributed across income groups. There is little evidence, however, as to whether such disparities are pervasive. We combine surface urban heat island (SUHI) data, a proxy for isolating the urban contribution to additional heat exposure in built environments, with census tract-level demographic data to answer these questions for summer days, when heat exposure is likely to be at a maximum. We find that the average person of color lives in a census tract with higher SUHI intensity than non-Hispanic whites in all but 6 of the 175 largest urbanized areas in the continental United States. A similar pattern emerges for people living in households below the poverty line relative to those at more than two times the poverty line.

Statistical analysis of surface urban heat island intensity variations: A case study of Babol city, Iran

2018 ◽  
Vol 56 (4) ◽  
pp. 576-604 ◽  
Author(s):  
Qihao Weng ◽  
Mohammad Karimi Firozjaei ◽  
Amir Sedighi ◽  
Majid Kiavarz ◽  
Seyed Kazem Alavipanah
Keyword(s):  
Statistical Analysis ◽  
Urban Heat Island ◽  
Urban Heat Island Intensity ◽  
Heat Island ◽  
Urban Heat ◽  
Surface Urban Heat Island

Surface Urban Heat Island Across 419 Global Big Cities

2011 ◽  
Vol 46 (2) ◽  
pp. 696-703 ◽  
Author(s):  
Shushi Peng ◽  
Shilong Piao ◽  
Philippe Ciais ◽  
Pierre Friedlingstein ◽  
Catherine Ottle ◽  
...  
Keyword(s):  
Urban Heat Island ◽  
Heat Island ◽  
Urban Heat ◽  
Surface Urban Heat Island ◽  
Big Cities
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