The interactions between urban heat island and heat waves amplify urban warming in Guangzhou, China: Roles of urban ventilation and local climate zones

Frontiers in Environmental Science, Journal Year: 2023, Volume and Issue: 11

Published: Feb. 10, 2023

Under the background of global warming, interaction between heat waves (HWs) and urban island (UHI) has led to trends increase in intensity, frequency, duration extreme events areas, seriously threatening health populations. Taking Guangzhou (a tropical megacity China) as an example, this study used automatic weather station data ERA5 reanalysis explore HWs UHI, elucidate effects wind speed local climate zones (LCZs) on such interaction. Results revealed obvious HWs–UHI Guangzhou, whereby induces amplification effect UHI intensity (UHII) that was most significant at night. In main area, UHII both weakened with increasing speed, indicating low speeds contribute increased occurrence enhancement UHII. Differently, some areas peripheral medium stronger than speeds, which reflect impact advection from center. For different LCZs strongest UHII, highest risk HW occurrence, were found compact mid-rise buildings low-rise (LCZ2 LCZ3, respectively), followed by high-rise (LCZ1), mainly affected shading buildings. The weakest lowest open (LCZ4 LCZ5, generally have good ventilation conditions. Our findings will help understand warming its association regions, implications for rational improvement thermal environment other regions globally.

Language: Английский

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A Data-Mining-Based Novel Approach to Analyze the Impact of the Characteristics of Urban Ventilation Corridors on Cooling Effect

Buildings, Journal Year: 2024, Volume and Issue: 14(2), P. 348 - 348

Published: Jan. 26, 2024

The appropriate design of urban ventilation corridors (VCs) can improve the thermal environment, thereby reducing energy consumption and promoting sustainable development. However, existing research lacks a comprehensive grasp characteristics VCs from multiple dimensions quantitative analysis its cooling effect. We propose novel approach based on data mining to comprehensively consider morphological environmental explore correlation between VC Selecting Nanjing as an example, index system was constructed, effect investigated, optimal range with different underlying surface types obtained. Results revealed that is closely related surface, leading temperature difference up 5.4 °C. vary 13 600 m. recommended parameter intervals for were determined. Finally, targeted strategies alleviate heat island proposed types. study output contributes VCs, which great significance in alleviating development cities.

Language: Английский

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Role of local climate zones and urban ventilation in canopy urban heat island–heatwave interaction in Nanjing megacity, China

Urban Climate, Journal Year: 2023, Volume and Issue: 49, P. 101474 - 101474

Published: March 7, 2023

Language: Английский

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Impact of urban wind environment on urban building energy: A review of mechanisms and modeling

Building and Environment, Journal Year: 2023, Volume and Issue: 245, P. 110947 - 110947

Published: Oct. 16, 2023

Language: Английский

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Make Way for the Wind—Promoting Urban Wind Corridor Planning by Integrating RS, GIS, and CFD in Urban Planning and Design to Mitigate the Heat Island Effect

Atmosphere, Journal Year: 2024, Volume and Issue: 15(3), P. 257 - 257

Published: Feb. 21, 2024

Under the trend in climate change, global warming, and increasingly serious urban heat island effect, promoting wind corridor planning to reduce temperature mitigate effect of islands has received widespread attention many cities. With emerging awareness need explicitly incorporate considerations into design, integrating current spatial analysis simulation tools enhance obtain best ventilation become an important research topic green city development. However, how systematically carry out by employing related technology is a that needs be explored urgently both theory practice. Taking Zhumadian City China as example, this study proposes method approach uses remote sensing (RS), geographic information system (GIS), computational fluid dynamics (CFD) integrated way understand landscape conduct planning. The results reveal form favors development corridors, railway lines some major roads have potential developed city’s main corridors. there are still barriers resulting from existing land use model building layout patterns adjusted. In terms local-level analysis, CFD also reveals common may result environments with poor ventilation. Finally, based on our empirical local environment, specific suggestions provided develop appropriate strategies for adjustments order impact effect.

Language: Английский

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Performance-based urban ventilation corridor for actual achievement of environmental benefits

Building and Environment, Journal Year: 2025, Volume and Issue: unknown, P. 112536 - 112536

Published: Jan. 1, 2025

Language: Английский

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A new perspective to assess urban heat islands by incorporating both canopy and boundary layer air temperature from the view of satellite remote sensing

Sustainable Cities and Society, Journal Year: 2025, Volume and Issue: unknown, P. 106315 - 106315

Published: March 1, 2025

Language: Английский

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Identification and cooling effect analysis of urban ventilation corridors in coastal hilly cities: A case study of Shenzhen

Urban Climate, Journal Year: 2025, Volume and Issue: 61, P. 102393 - 102393

Published: March 25, 2025

Language: Английский

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Assessing how Wind Environments Impact Urban Building Energy: A Simulation Workflow Application and Evaluation in Shanghai

Sustainable Cities and Society, Journal Year: 2025, Volume and Issue: unknown, P. 106442 - 106442

Published: May 1, 2025

Language: Английский

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Identification of Urban Ventilation Corridor System Using Meteorology and GIS Technology: A Case Study in Zhengzhou, China

Atmosphere, Journal Year: 2024, Volume and Issue: 15(9), P. 1034 - 1034

Published: Aug. 27, 2024

Urban ventilation corridors are designed to enhance air quality, alleviate urban thermal conditions, reduce pollution and energy consumption, as well improve human comfort within cities. They play a pivotal role in mitigating environmental impacts, particularly densely populated areas. Based on satellite remote sensing data, meteorological observations, basic geographic information of Zhengzhou City its surroundings, planning we analyzed the wind environment, heat island, ecological cold sources, potential. The findings reveal several key insights: (1) Dominant winds predominantly originate from northwest, northeast, south, influenced by topography monsoon climate, with seasonal variations. These patterns crucial considerations for designing primary corridors. (2) island exhibits polycentric spatial distribution, intensity decreasing city center towards periphery. Ecological primarily situated outskirts, act reservoirs fresh that mitigate effect through designated (3) A preliminary corridor system, termed “eight thirteen secondary corridors”, is proposed based an integrated assessment potential, surface roughness, sky view factor. This research contributes advancing understanding systems provides practical insights policymakers, planners, researchers seeking sustainable solutions climate impacts rapidly urbanizing environments region.

Language: Английский

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