Urban Expansion and Drying Climate in an Urban Agglomeration of East China DOI
Ming Luo, Ngar‐Cheung Lau

Geophysical Research Letters, Journal Year: 2019, Volume and Issue: 46(12), P. 6868 - 6877

Published: May 23, 2019

Abstract Urban land expansion is one of the most conspicuous aspects urbanization and has profound impacts on regional climate change. Most studies, however, focus its surface temperature, possible effects atmospheric humidity are less known. By examining changes in Yangtze River Delta urban agglomeration China during 1961–2014, we find a prominent dry island (UDI) effect this agglomeration, as characterized by reduced increased vapor pressure deficit core area. In past decades, UDI been significantly intensified rapid expansion. contributes to around half decrease increase areas. These particularly stronger wet hot summer relatively weaker cold winter. We suggest that should be considered future planning, landscape design, change assessment mitigation.

Language: Английский

Amplified Urban Heat Islands during Heat Wave Periods DOI Creative Commons
Shaojing Jiang, Xuhui Lee, Jiankai Wang

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2019, Volume and Issue: 124(14), P. 7797 - 7812

Published: July 13, 2019

Abstract Heat waves and urban heat islands (UHIs) may interact together, but the dependence of their interaction on background climate is unclear. Hourly meteorological observations in June to August from 2013 2015 collected megacities Beijing (temperate semihumid monsoon climate), Shanghai (subtropical humid Guangzhou (marine subtropical climate) China were used study interaction. At each megacity, eight rural stations stations, respectively, selected UHI. Although under different climates, UHIs shared a similar diurnal variability, that is, higher nighttime. However, cycle opposite for if coastal as reference stations. During wave periods, daytime (10:00–16:00) intensified by 0.9 ± 0.13 (mean 1 standard deviation) °C Shanghai, nighttime (22:00–4:00) 0.36 0.8 0.20 Guangzhou, respectively. The surface solar radiation during period was approximately 1.5 times normal conditions city. enhanced waves, which absorbed canopy released at night, closely related Shanghai. Additionally, changes wind direction observed with more than 63% (wind direction) originating neighboring hot cities southwest instead cool sea breeze southeast, led significant increase periods.

Language: Английский

Citations

157
Heat Waves: Physical Understanding and Scientific Challenges DOI Creative Commons
David Barriopedro, Ricardo García‐Herrera, Carlos Ordóñez

et al.

Reviews of Geophysics, Journal Year: 2023, Volume and Issue: 61(2)

Published: April 26, 2023

Abstract Heat waves (HWs) can cause large socioeconomic and environmental impacts. The observed increases in their frequency, intensity duration are projected to continue with global warming. This review synthesizes the state of knowledge scientific challenges. It discusses different aspects related definition, triggering mechanisms, changes future projections HWs, as well emerging research lines on subseasonal forecasts specific types HWs. We also identify gaps that limit progress delineate priorities for research. Overall, physical drivers HWs not understood, partly due difficulties quantification interactions responses climate change. Influential factors convey processes at spatio‐temporal scales, from warming large‐scale atmospheric circulation regional local affected area upwind regions. Although some thermodynamic have been identified, there is a lack understanding dynamical aspects, forcings feedbacks, changes. hampers attribution trends individual events, reduces ability provide accurate projections. Sustained observational networks, models diverse complexity, narrative‐based methodological approaches artificial intelligence offer new opportunities toward process‐based interdisciplinary

Language: Английский

Citations

132
Urban Heat Island: Causes, Consequences, and Mitigation Measures with Emphasis on Reflective and Permeable Pavements DOI Creative Commons
Svetlana Vujović, Bechara Haddad, Hamzé Karaky

et al.

CivilEng, Journal Year: 2021, Volume and Issue: 2(2), P. 459 - 484

Published: June 9, 2021

Economic and social development of urban rural areas continues in parallel with the increase human population, especially developing countries, which leads to sustained expansion impervious surface areas, particularly paved surfaces. The conversion pervious surfaces significantly modifies local energy balance contributes heat island (UHI) formation, mainly densely developed cities. This paper represents a literature review on causes consequences UHI potential measures that could be adopted improve microclimate. primary focus is discuss summarise significant findings phenomenon its consequences, such as impact thermal comfort health, consumption, air pollution, water quality deterioration. Regarding mitigate UHI, particular emphasis given reflective permeable pavements.

Language: Английский

Citations

131
Combating Urban Heat Island Effect—A Review of Reflective Pavements and Tree Shading Strategies DOI Creative Commons
Venkata Ravi Sankar Cheela,

Michele John,

Wahidul K. Biswas

et al.

Buildings, Journal Year: 2021, Volume and Issue: 11(3), P. 93 - 93

Published: March 3, 2021

Pavements occupy about 40% of urban land cover, with 75–80% black top roads, playing a critical role in connectivity and mobility. Solar energy is absorbed stored pavements leading to an increase surface temperatures. Decreasing green cover further contributing rise regional Due this activity, the city experiences heat island (UHI). This study presents review literature on mitigation measures combat UHI using reflective emphasis durability properties impacts tree canopy. The strategies focus application chip seals, white toppings, coatings were discussed. Role reflectance, including those from asphalt concrete pavements, albedo improvements, technological trends, waste materials, industrial by-products are presented. Also, shading systems’ contribution pavement temperature microclimate systems shows that development can reduce during daytime human thermal comfort. outcomes provide scope for future studies develop sustainable state-of-the-art engineering solutions field forest systems.

Language: Английский

Citations

118
Integrated Assessment of Urban Overheating Impacts on Human Life DOI Creative Commons
Negin Nazarian, E. Scott Krayenhoff, Benjamin Bechtel

et al.

Earth s Future, Journal Year: 2022, Volume and Issue: 10(8)

Published: Aug. 1, 2022

Abstract Urban overheating, driven by global climate change and urban development, is a major contemporary challenge that substantially impacts livability sustainability. Overheating represents multifaceted threat to the well‐being, performance, health of individuals as well energy efficiency economy cities, it influenced complex interactions between building, city, scale climates. In recent decades, extensive discipline‐specific research has characterized heat assessed its implications on human life, including ongoing efforts bridge neighboring disciplines. The horizon now encompasses problems involving wide range disciplines, therefore comprehensive integrated assessments are needed address such interdisciplinarity. Here, our objective go beyond review existing literature instead provide broad overview defining holistic pathways for addressing life. We (a) detail characterization hazards exposure across different scales in various (b) identify individual sensitivities overheating increase vulnerability cause adverse populations, (c) elaborate adaptive capacities cities can adopt, (d) document energy, (e) discuss frontiers theoretical applied climatology, built environment design, governance toward reduction at scales. most critical challenges future application identified, targeting both gaps need greater integration assessments.

Language: Английский

Citations

115
The win-win interaction between integrated blue and green space on urban cooling DOI Creative Commons
Wen Zhou, Cao Wei, Tao Wu

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 863, P. 160712 - 160712

Published: Dec. 9, 2022

The contributions of urban blue and green spaces on cooling are widely acknowledged. However, the combined effect integrated space remains uncertain. In this study, a combination modelling observational analyses uncovered win-win interaction between coexisting in terms cooling. That is, integration water bodies can reinforce mutual potential provide greater than stand-alone spaces. results indicated that known influencing factors such as area, shape planting structure had no impact riverside Instead, width adjacent river reach degree contact with were significantly positively related to surface/air temperature be 4.2 °C/3.7 °C lower daytime summer, 3.1 °C/2.7 spring non-riverside similar size. Urban inside could cause about 0.99 1.45 more deduction land surface (LST) simple size respectively. There 1 °C‑2.9 deductions air when it is accompanied by More specifically, complete coverage vegetated areas within 30 m buffer both riverbanks result 3.37 higher LST compared vegetation riverbank study extend understanding blue-green implications for sustainable planning.

Language: Английский

Citations

70
Spectrally engineered textile for radiative cooling against urban heat islands DOI
Ronghui Wu, Chenxi Sui, Ting‐Hsuan Chen

et al.

Science, Journal Year: 2024, Volume and Issue: 384(6701), P. 1203 - 1212

Published: June 13, 2024

Radiative cooling textiles hold promise for achieving personal thermal comfort under increasing global temperature. However, urban areas have heat island effects that largely diminish the effectiveness of as wearable fabrics because they absorb emitted radiation from ground and nearby buildings. We developed a mid-infrared spectrally selective hierarchical fabric (SSHF) with emissivity greatly dominant in atmospheric transmission window through molecular design, minimizing net gain surroundings. The SSHF features high solar spectrum reflectivity 0.97 owing to strong Mie scattering nano-micro hybrid fibrous structure. is 2.3°C cooler than solar-reflecting broadband emitter when placed vertically simulated outdoor scenarios during day also has excellent properties.

Language: Английский

Citations

70
The urban heat island and thermal heat stress correlate with climate dynamics and energy budget variations in multiple urban environments DOI
Nurul Syahira Mohammad Harmay, Minha Choi

Sustainable Cities and Society, Journal Year: 2023, Volume and Issue: 91, P. 104422 - 104422

Published: Jan. 23, 2023

Language: Английский

Citations

60
Divergent urbanization-induced impacts on global surface urban heat island trends since 1980s DOI Creative Commons
Long Li, Wenfeng Zhan, Leiqiu Hu

et al.

Remote Sensing of Environment, Journal Year: 2023, Volume and Issue: 295, P. 113650 - 113650

Published: June 1, 2023

Language: Английский

Citations

59
Satellite‐based evidence highlights a considerable increase of urban tree cooling benefits from 2000 to 2015 DOI
Jiacheng Zhao, Xiang Zhao, Donghai Wu

et al.

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(11), P. 3085 - 3097

Published: March 6, 2023

Tree planting is a prevalent strategy to mitigate urban heat. cooling efficiency (TCE), defined as the temperature reduction for 1% tree cover increase, plays an important role in climate it regulates capacity of trees alter surface energy and water budget. However, spatial variation more importantly, temporal heterogeneity TCE global cities are not fully explored. Here, we used Landsat-based land (LST) compare TCEs at reference air level across 806 explore their potential drivers with boosted regression (BRT) machine learning model. From results, found that spatially regulated by only leaf area index (LAI) but variables anthropogenic factors especially city albedo, without specific variable dominating others. such difference attenuated decrease cover, most pronounced midlatitude cities. During period 2000-2015, than 90% analyzed showed increasing trend TCE, which likely explained combined result increase LAI, intensified solar radiation due decreased aerosol content, vapor pressure deficit (VPD) albedo. Concurrently, significant afforestation occurred many showing city-scale mean 5.3 ± 3.8% from 2000 2015. Over growing season, increases were estimated on average yield midday 1.5 1.3°C tree-covered areas. These results offering new insights into use adaptation warming planners may leverage them provide benefits if primarily planted this purpose.

Language: Английский

Citations

45