Efficient cooling of cities at global scale using urban green space to mitigate urban heat island effects in different climatic regions

Urban forestry & urban greening, Journal Year: 2022, Volume and Issue: 74, P. 127635 - 127635

Published: June 11, 2022

Language: Английский

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Assessing the impact of fractional vegetation cover on urban thermal environment: A case study of Hangzhou, China

Sustainable Cities and Society, Journal Year: 2023, Volume and Issue: 96, P. 104663 - 104663

Published: May 21, 2023

Language: Английский

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The Application of Nature-Based Solutions for Urban Heat Island Mitigation in Asia: Progress, Challenges, and Recommendations

Current Environmental Health Reports, Journal Year: 2024, Volume and Issue: 11(1), P. 4 - 17

Published: Jan. 3, 2024

Language: Английский

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Insights into the Effect of Urban Morphology and Land Cover on Land Surface and Air Temperatures in the Metropolitan City of Milan (Italy) Using Satellite Imagery and In Situ Measurements

Remote Sensing, Journal Year: 2023, Volume and Issue: 15(3), P. 733 - 733

Published: Jan. 27, 2023

With a concentration of people, activities, and infrastructures, urban areas are particularly vulnerable to the negative effects climate change. Among others, intensification Urban Heat Island (UHI) effect is leading an increased impact on citizen health ecosystem. In this context, study aims investigate morphology land cover composition—which established by exploiting Local Climate Zone (LCZ) classification system—on two indicators, i.e., Land Surface Temperature (LST) air temperature. The area Metropolitan City Milan (northern Italy). LCZ LST maps derived leveraging satellite imagery building height datasets. Both authoritative crowdsourced in situ measurements used for analysis Several experiments run mutual relation between LCZ, LST, temperature measuring patterns different LCZs periods. Besides strong temporal correlation temperature, results point out vegetation natural as major mitigating factors both variables. On other hand, higher buildings turn increase local while buffering values. A way lower influence density measured, with compact experiencing slightly yet no significant differences terms LST. These outcomes provide valuable tools planners stakeholders implementing evidence-based UHI mitigation strategies.

Language: Английский

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Greater local cooling effects of trees across globally distributed urban green spaces

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 911, P. 168494 - 168494

Published: Nov. 18, 2023

Urban green spaces (UGS) are an effective mitigation strategy for urban heat islands (UHIs) through their evapotranspiration and shading effects. Yet, the extent to which local UGS cooling effects vary across different background climates, plant characteristics settings global cities is not well understood. This study analysed 265 air temperature (TA) measurements from 58 published studies globally distributed sites infer potential influence of climate, variables among types (trees, grass, roofs walls). We show that trees were more at reducing TA, with reductions 2-3 times greater than grass walls. use a hierarchical linear mixed model reveal climate (mean annual temperature) (specific leaf area vegetation index) had greatest on types, while did significantly UGS. Notably, dominated overall cities, indicating tree growth in mild climates lower mean temperatures has against UHIs. Our findings provide insights using interventions, particularly worldwide diverse climatic environmental conditions highlight essential role creating healthy living environments citizens under extreme weather conditions.

Language: Английский

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The cooling capacity of urban vegetation and its driving force under extreme hot weather: A comparative study between dry-hot and humid-hot cities

Building and Environment, Journal Year: 2024, Volume and Issue: 263, P. 111901 - 111901

Published: July 30, 2024

Language: Английский

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Cooling efficacy of trees across cities is determined by background climate, urban morphology, and tree trait

Communications Earth & Environment, Journal Year: 2024, Volume and Issue: 5(1)

Published: Dec. 10, 2024

Abstract Urban planners and other stakeholders often view trees as the ultimate panacea for mitigating urban heat stress; however, their cooling efficacy varies globally is influenced by three primary factors: tree traits, morphology, climate conditions. This study analyzes 182 studies on effects of across 17 climates in 110 global cities or regions. Tree implementation reduces peak monthly temperatures to below 26 °C 83% cities. Trees can lower pedestrian-level up 12 through large radiation blockage transpiration. In tropical, temperate, continental climates, a mixed-use deciduous evergreen open morphology provides approximately 0.5 more than single species approach. arid predominate demonstrate effective within compact morphology. Our offers context-specific greening guidelines harness face warming.

Language: Английский

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Inequality in heat: The role of spatial patterns of urban green infrastructure

Urban Climate, Journal Year: 2024, Volume and Issue: 53, P. 101820 - 101820

Published: Jan. 1, 2024

Language: Английский

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Identifying the Effects of Vegetation on Urban Surface Temperatures Based on Urban–Rural Local Climate Zones in a Subtropical Metropolis

Remote Sensing, Journal Year: 2023, Volume and Issue: 15(19), P. 4743 - 4743

Published: Sept. 28, 2023

Many studies have observed the crucial role of vegetated local climate zone (LCZ) types in mitigating surface urban heat island (SUHI) effect. However, research analyzing spatial variations land temperature (LST) a metropolis based on an urban–rural LCZ scheme and exploring cooling effects different vegetation is still lacking. Here, our study focuses Guangzhou–Foshan aims to elucidate LST subtropical cities regulating effect changes. We used normalized difference index (NDVI) data from space-borne MODIS products for years 2000, 2009, 2019, as well maps, gradient data, use cover (LULC) maps. Urban–rural, seasonal, daytime, nighttime, diurnal comparative analyses were conducted using logarithmic regression, Pearson partial correlation, comparison analysis. The results showed that values built generally higher than those types, showing positive correlation with building density height. decreased logarithmically across gradients, rapid decrease initially near-gradient area, followed by flattening trend farther-gradient suburban rural areas. Regarding NDVI metrics significant negative during daytime but nighttime. was evident, average amplitude 1.92 °C over three investigated years. In conclusion, changes are closely associated values, types. ability exhibited seasonal variations, special emphasis dense evergreen broadleaf forests. Our findings offer valuable insights can guide ecological construction management comprehensively assessing impact temperatures.

Language: Английский

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Harnessing cooling from urban trees: Interconnecting background climates, urban morphology, and tree traits

Published: Jan. 26, 2024

Abstract. Rapid increases in heat exposure urban areas, fueled by both climate change and islands (UHI), are manifesting as a pressing concern. Planting conserving trees is one of the pivotal strategies mitigating outdoor optimizing thermal comfort. We present an integrated review meta-analysis 131 studies conducted past 13 years, investigating cooling effects across 15 types 85 global cities or regions. The efficacy mainly determined interconnecting morphology, tree traits, and, critically, prevailing background climates. Our reveals that observed hot climates significant due to low latitudes, along with their substantial solar radiation blockage pronounced transpirational cooling. Moreover, optimal level can be achieved at relatively lower humidity levels. However, tropical arid climates, extreme conditions involving high temperatures vapor pressure deficits may trigger stomata closure leaves, thereby impeding further underscores guiding principles morphology arranging buildings trees, well selecting suitable species according traits enhance different demonstrate nonlinear increase correlation higher leaf area index (LAI), density (LAD), canopy coverage, inversely, sky view factor (SVF). This systematic serve critical resource for researchers, planners, policymakers striving mitigate strategically using trees.

Language: Английский

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