Downwind Warming of Cities? Inequal Heat Distribution Attributed to Winds

IF 10.5 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Sustainable Cities and Society Pub Date : 2024-10-13 DOI:10.1016/j.scs.2024.105879

Wan-Yu Shih , Min-Hui Lo , Undrakh Ganzorig

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Abstract

Heat exposure within urban areas is strikingly uneven, posing disproportionate risks to certain communities. While nature-based solutions have gained attention, the role of wind in distributing heat remains less understood in an urban planning scale. This study assessed the interaction between wind direction, speed, and heat advection in Taipei Basin during summers from 2011 to 2020, using data from densely installed meteorological stations. A novel method was developed to capture multiple wind directions while accounting for local terrain and urban effects. Results revealed that wind-induced heat advection is complicated by local terrain and nearby cities in the conurbation, varying heat distribution. Windy conditions were mostly warmer than calm conditions, with north-westerly and westerly winds causing the strongest heat advection. Heat advection increased with wind speeds up to 5.4 m/s and decreased thereafter. Substantial intra-urban differences in heat advection were observed, reaching 4.33°C daytime and 3.34°C nighttime. Upwind areas were not necessarily cooler, while some downwind areas at mountain foot experienced greater warming. Up to 2.6SD of advected heat magnitude was found downwind at night. These findings underscore inequitable heat transfer to areas that do not generate heat and the critical need for wind-sensitive planning for both city-region and inter-urban areas.

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城市顺风变暖？风导致热量分布不均

城市地区的热量分布极不均衡，给某些社区带来了过大的风险。以自然为基础的解决方案已受到关注，但在城市规划范围内，人们对风在热量分布中的作用仍不甚了解。本研究利用密集安装的气象站数据，评估了 2011 年至 2020 年夏季台北盆地的风向、风速和热吸力之间的相互作用。研究开发了一种新方法来捕捉多种风向，同时考虑当地地形和城市的影响。结果表明，风引起的热量平流受到当地地形和附近城市的影响，热量分布不一。大风条件下的气温大多高于平静条件下的气温，其中西北风和西风引起的热吸力最强。风速达到 5.4 米/秒时，热吸力增强，风速达到 5.4 米/秒后，热吸力减弱。城市内部的热吸力差异很大，白天达到 4.33°C，夜间达到 3.34°C。上风向地区的气温不一定较低，而山脚下的一些下风向地区则升温较快。夜间下风向的热量平移幅度高达 2.6SD。这些发现强调了向不产生热量的地区传热的不公平现象，以及对城市区域和城市间地区进行风敏感规划的迫切需要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sustainable Cities and Society Social Sciences-Geography, Planning and Development

CiteScore

22.00

自引率

13.70%

发文量

810

审稿时长

27 days

期刊介绍： Sustainable Cities and Society (SCS) is an international journal that focuses on fundamental and applied research to promote environmentally sustainable and socially resilient cities. The journal welcomes cross-cutting, multi-disciplinary research in various areas, including: 1. Smart cities and resilient environments; 2. Alternative/clean energy sources, energy distribution, distributed energy generation, and energy demand reduction/management; 3. Monitoring and improving air quality in built environment and cities (e.g., healthy built environment and air quality management); 4. Energy efficient, low/zero carbon, and green buildings/communities; 5. Climate change mitigation and adaptation in urban environments; 6. Green infrastructure and BMPs; 7. Environmental Footprint accounting and management; 8. Urban agriculture and forestry; 9. ICT, smart grid and intelligent infrastructure; 10. Urban design/planning, regulations, legislation, certification, economics, and policy; 11. Social aspects, impacts and resiliency of cities; 12. Behavior monitoring, analysis and change within urban communities; 13. Health monitoring and improvement; 14. Nexus issues related to sustainable cities and societies; 15. Smart city governance; 16. Decision Support Systems for trade-off and uncertainty analysis for improved management of cities and society; 17. Big data, machine learning, and artificial intelligence applications and case studies; 18. Critical infrastructure protection, including security, privacy, forensics, and reliability issues of cyber-physical systems. 19. Water footprint reduction and urban water distribution, harvesting, treatment, reuse and management; 20. Waste reduction and recycling; 21. Wastewater collection, treatment and recycling; 22. Smart, clean and healthy transportation systems and infrastructure;