全球时空空间分析城市热岛和极端热浪之间的相互作用
Johnny Guo1, Xuhui Lee2, Keer Zhang3,4
1Choate Rosemary Hall, Wallingford, CT, 06492, USA.
Scientific reports
|February 14, 2026
概括
城市热岛 (UHI) 加剧热浪 (HWs),特别是在夜间. 湿度和长波辐射是这种相互作用的关键驱动因素,因气候区而异,影响城市适应策略.
科学领域:
- 环境科学 环境科学
- 气候科学 气候科学
- 城市气候学 城市气候学
背景情况:
- 极端热浪 (HWs) 构成重大公共卫生风险,特别是在城市地区,由于城市热岛 (UHI) 效应.
- 之前对UHI-HW相互作用的研究仅限于单个城市/地区,全球模式和机制不清楚.
研究的目的:
- 分析不同气候背景的UHI-HW相互作用的全球模式和机制.
- 量化当地能量流,气候和土地表面特征对UHI-HW相互作用的贡献.
主要方法:
- 城市热岛强度 (UHII) 的全球模拟从1985-2013年使用社区土地模型 (CLM).
- 对UHII-HW相互作用的空间和日间模式的分析.
- 机器学习 (CatBoost) 和SHAP的应用用于赋予交互驱动器.
主要成果:
- 晚上UHI-HW相互作用更为积极,在当地太阳时间上午6点达到峰值.
- 净长波辐射是一个强有力的指标;湿度是关键驱动因素,除了感知热量流和风速之外.
- 因素的影响在科本-盖格尔气候区之间有很大差异.
结论:
- 该研究揭示了复杂的全球UHI-HW相互作用及其潜在的生物物理驱动因素.
- 这些发现对在全球变暖的世界中制定有针对性的城市气候适应战略具有重要意义.
- 一种机器学习方法有效地归因于UHI-HW交互中的空间变化.
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