Urban Heat Island studies in South Asia: A critical review

Kotharkar, Rajashree; Ramesh, Aparna; Bagade, Anurag

doi:10.1016/j.uclim.2017.12.006

Cited by 125 publications

(62 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Of these, CLUHI, which refers to the air temperature difference 2 m above the ground, is significant because it is the height at which most outdoor activities takes place. In this paper, unless otherwise stated, UHI refers to CLUHI.The UHI effect at all levels has been extensively documented for decades around the world (see, e.g., [15][16][17][18][19] for SUHI and [20,21] for UHI at all levels), with the difference in temperatures between urban and adjacent rural areas ranging from less than 1 • C (in estimates for Atlanta, USA [22] for CLUHI) to over 10 • C (in estimates for Beijing, China [16] for SUHI). Memon et al [23] summarized the intensity of the UHI, as observed in several studies.…”

mentioning

confidence: 99%

Cool Pavement Strategies for Urban Heat Island Mitigation in Suburban Phoenix, Arizona

et al. 2019

View full text Add to dashboard Cite

Urban areas are characterized by a large proportion of artificial surfaces, such as concrete and asphalt, which absorb and store more heat than natural vegetation, leading to the Urban Heat Island (UHI) effect. Cool pavements, walls, and roofs have been suggested as a solution to mitigate UHI, but their effectiveness depends on local land-use patterns and surrounding urban forms. Meteorological data was collected using a mobile platform in the Power Ranch community of Gilbert, Arizona in the Phoenix Metropolitan Area, a region that experiences harsh summer temperatures. The warmest hour recorded during data collection was 13 August 2015 at 5:00 p.m., with a far-field air temperature of about 42 ∘ C and a low wind speed of 0.45 m/s from East-Southeast (ESE). An uncoupled pavement-urban canyon Computational Fluid Dynamics (CFD) model was developed and validated to study the microclimate of the area. Five scenarios were studied to investigate the effects of different pavements on UHI, replacing all pavements with surfaces of progressively higher albedo: New asphalt concrete, typical concrete, reflective concrete, making only roofs and walls reflective, and finally replacing all artificial surfaces with a reflective coating. While new asphalt surfaces increased the surrounding 2 m air temperatures by up to 0.5 ∘ C, replacing aged asphalt with typical concrete with higher albedo did not significantly decrease it. Reflective concrete pavements decreased air temperature by 0.2–0.4 ∘ C and reflective roofs and walls by 0.4–0.7 ∘ C, while replacing all roofs, walls, and pavements with a reflective coating led to a more significant decrease, of up to 0.8–1.0 ∘ C. Residences downstream of major collector roads experienced a decreased air temperature at the higher end of these ranges. However, large areas of natural surfaces for this community had a significant effect on downstream air temperatures, which limits the UHI mitigation potential of these strategies.

show abstract

mentioning

confidence: 99%

Cool Pavement Strategies for Urban Heat Island Mitigation in Suburban Phoenix, Arizona

et al. 2019

View full text Add to dashboard Cite

show abstract

“…3. Reducing the urban heat island effect The conversion of natural land cover with dense concentrations of buildings, pavements, streets, and other surfaces that absorb and retain heat is the main cause of urban heat effect (Rajashree 2018) (fig.5). It increases the local temperature that lead to rising of energy costs to cooling, air pollution, and other health issues on urban communities.…”

Section: Green Infrastructure To Improve Climate Resiliencymentioning

confidence: 99%

“…The urban heat effect also may trigger the longer heat waves in the summer months particularly in north global cities (Klok et al 2018). A use of GI element such as trees, green roofs, green wall, and vegetation is expected to reduce urban heat island consequences by shading building surfaces, deflecting solar radiation, and releasing moisture into the atmosphere (Rajashree 2018 4. Lowering building energy demands GI employs the natural elements such as trees and vegetative in its development.…”

Section: Green Infrastructure To Improve Climate Resiliencymentioning

confidence: 99%

Urban Green Infrastructure for Climate Resilience: A Review

Tauhid

2018

nature

View full text Add to dashboard Cite

“…Recently, special attention is paid to the urban heat islands (UHI) [2][3][4]. We are talking about an increase in the ambient temperature observed in large cities, where the air temperature usually is several degrees higher than in the adjacent areas [5,6]. Studies carried out in different countries show that this effect is observed in almost all major cities of the world [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Assessment of thermal conditions in Krasnoyarsk urban area with use of different satellite data and geographic information system

Matuzko

Yakubailik

2019

THERM SCI

View full text Add to dashboard Cite

Satellite data in the thermal infrared range are a powerful source of information for the analysis and determination of city urban area temperature anomalies. The article presents a technique for monitoring the land surface temperature on the basis of combination of "Landsat 8" satellite thermal infrared data with Plan-etScope satellite constellation high resolution data. Such combination of satellite data from several spacecrafts increase the detalization of temperature maps to the level of individual city blocks. Determination of the nature and boundaries of temperature anomalies will help to understand the causes of the unfavorable environmental situation in Krasnoyarsk, where, in addition to high industrial emissions, their influence and atmospheric processes, leading to the fact that impurities are delayed and concentrated over the city. The results shows that the temperature in the places of thermal anomalies is 5º-8º higher than the average land surface temperature of the city. Based on the results of the analysis of summer thermal multi-temporal space images, several thermal zones of different nature were outlined on the territory under consideration. This information can be used in planning the development of the city, the design of new urban neighborhoods.

show abstract

Urban Heat Island studies in South Asia: A critical review

Cited by 125 publications

References 60 publications

Cool Pavement Strategies for Urban Heat Island Mitigation in Suburban Phoenix, Arizona

Cool Pavement Strategies for Urban Heat Island Mitigation in Suburban Phoenix, Arizona

Urban Green Infrastructure for Climate Resilience: A Review

Assessment of thermal conditions in Krasnoyarsk urban area with use of different satellite data and geographic information system

Contact Info

Product

Resources

About