A systematic approach for urban heat island mitigation strategies in critical local climate zones of an Indian city

Kotharkar, Rajashree; Bagade, Anurag; Singh, Pranjal Raj

doi:10.1016/j.uclim.2020.100701

Cited by 45 publications

(31 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This method is also widely used in China [10,11]. LST varies among different LCZs with higher LST over builttype LCZs and lower LST over natural-type LCZs [9,20,21]. However, the spatiotemporal variations of LST based on LCZs are different across different cities [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Urban Thermal Characteristics of Local Climate Zones and Their Mitigation Measures across Cities in Different Climate Zones of China

Yang

Qiao

et al. 2021

Remote Sensing

View full text Add to dashboard Cite

Understanding the urban thermal environment is vital for improving urban planning and strategy development when mitigating urban heat islands. However, urban thermal characteristics of local climate zones (LCZ) are different within cities and most studies lack regional perspective. This study explored surface thermal performances of cities in three urban agglomerations (Jing-Jin-Ji, Yangtze River Delta and Pearl River Delta) in China using MODIS land surface temperature (LST). Besides that, the diurnal and seasonal LST variations of LCZs are also studied. Moreover, the optimal LCZs for better urban cooling are also investigated in this study. Although the thermal distributions of LCZs are different in China, there are still some similar features. Our four key findings were as follows. (1) LCZs in China are well classified, with average overall accuracy of 82% being higher than that in some previous studies. (2) The LST of mid-rise (LCZ 2, 5) is higher than that of high- and low-rise buildings (LCZ 1, 3, 4, 6); and compact buildings are warmer than open buildings (LCZ 1–3 > LST 4–6) in summer of China. That shows both mid-rise and compact buildings are not beneficial to cool urban. In addition, LST variations at daytime and in summer are more significant than nighttime and other seasons. (3) LST differences within LCZs are significant at p < 0.05, and are most significant in Jing-Jin-Ji (JJJ). The LST difference within built types (LCZ 1–10) is more significant than within natural types (LCZ A–G), showing that built types alteration will be more effective for thermal environmental improvement. (4) Under the current population and urban area, increasing greenness and water area in compact high-rise buildings are the most effective strategies for urban cooling in all three urban agglomerations, with the largest reduction in LST of 4.11 K in JJJ. These findings will provide support for thermal environment mitigation, urban planning and sustainable urban development.

show abstract

Section: Introductionmentioning

confidence: 99%

Urban Thermal Characteristics of Local Climate Zones and Their Mitigation Measures across Cities in Different Climate Zones of China

Yang

Qiao

et al. 2021

Remote Sensing

View full text Add to dashboard Cite

show abstract

“…Multi-criteria mathematical models [3,[12][13][14][15][16][17][18][19] are a valuable, theoretical, qualitative, and quantitative way of decision making and also a first step towards developing a DST. These models are supported by expert assistance which considers the socio-cultural factors and local environment.…”

Section: Resultsmentioning

confidence: 99%

“…A survey has been conducted on the use of different MCDA techniques for UHI and UHS mitigation. The following methods were applied for UHS [3,[13][14][15][16][17][18][19][20] and are briefly discussed with their limitations in Table 1. The following methods were applied for UHS [3,[13][14][15][16][17][18][19][20] and are briefly discussed with their limitations in Table 1.…”

Section: Multi-criteria Decision Analysismentioning

confidence: 99%

Review and Comparative Study of Decision Support Tools for the Mitigation of Urban Heat Stress

Qureshi

Rachid

2021

Climate

View full text Add to dashboard Cite

Over the last few decades, Urban Heat Stress (UHS) has become a crucial concern of scientists and policy-makers. Many projects have been implemented to mitigate Urban Heat Island (UHI) effects using nature-based solutions. However, decision-making and selecting an adequate framework are difficult because of complex interactions between natural, social, economic and built environments. This paper contributes to the UHI issue by: (i) identifying the most important key factors of a Decision Support Tool (DST) used for urban heat mitigation, (ii) presenting multi-criteria methods applied to urban heat resilience, (iii) reviewing existing spatial and non-spatial DSTs, (iv) and analyzing, classifying and ranking DSTs. It aims to help decision-makers through an overview of the pros and cons of existing DSTs and indicate which tool is providing maximum support for choosing and planning heat resilience measures from the designing phase to the heat mitigation phase. This review shows that Multi-Criteria Decision Analysis (MCDA) can be used for any pilot site and the criteria can be adapted to the given location accordingly. It also highlights that GIS-based spatial tools have an effective decision support system (DSS) because they offer a quick assessment of interventions and predict long-term effects of urban heat. Through a comparative study using specific chosen criteria, we conclude that the DSS tool is well suited and fulfils many prerequisites to support new policies and interventions to mitigate UHS.

show abstract

“…Cities all over the world are experiencing urban heat islands (UHI). In urban environments, the phenomenon of UHI is characterized by increased temperatures at surface, sub-surface, or air levels compared to their undeveloped rural counterparts [1,2]. It has been observed that UHI phenomena are more prevalent during the summer when the weather is clear and calm [3].…”

Section: Introductionmentioning

confidence: 99%

“…The rapid development of infrastructure has led to the replacement of open space in many developing countries [6]. As a result of urbanization and climate change, the UHI effect in tropical cities has grown [1,7]. Climate change has already created hotter summers and different patterns of rainfall in these regions [1].…”

Section: Introductionmentioning

confidence: 99%

A Review of How Building Mitigates the Urban Heat Island in Indonesia and Tropical Cities

Sari¹

2021

Earth

View full text Add to dashboard Cite

A consequence of urbanization was the intensification of urban heat islands, especially in tropical cities. There have been rapid developments in infrastructure that have displaced open spaces. Meanwhile, Indonesia has a tropical climate directly affected by climate change. A high priority has been placed on adaptation measures to address issues such as sea-level rise, increased extreme weather, and threats to ecosystems and biodiversity. There is still a lack of specific knowledge regarding tropical climate in urban areas. In this paper, the author examines how building and urban planning affect urban heat islands in the tropics. According to the review, early planning and building based on local weather data can reduce the energy consumption and minimize the UHI effect. Furthermore, a media campaign and early education should increase awareness about adaptation measures between governments and citizens. Based on the findings from this study, some recommendations are offered for future urban planning, especially for tropical climates, to reduce UHI effects.

show abstract

A systematic approach for urban heat island mitigation strategies in critical local climate zones of an Indian city

Cited by 45 publications

References 55 publications

Urban Thermal Characteristics of Local Climate Zones and Their Mitigation Measures across Cities in Different Climate Zones of China

Urban Thermal Characteristics of Local Climate Zones and Their Mitigation Measures across Cities in Different Climate Zones of China

Review and Comparative Study of Decision Support Tools for the Mitigation of Urban Heat Stress

A Review of How Building Mitigates the Urban Heat Island in Indonesia and Tropical Cities

Contact Info

Product

Resources

About