众所周知，城市地表和近地表的气温往往高于农村地区，这种现象现在被称为城市热岛效应。那么在与热浪相当的时间尺度上，城市气温升高是否比农村气温更持久？尽管这一问题对人类健康很重要，但尚未得到解决。
研究团队将全球气候模型的数值模拟和地表能量平衡理论相结合，证明城市地表和近地表气温比农村地区的气温更持久，因为城市主要由巨大热惯性的不透水材料建成。这些材料的进一步使用将导致城市温度具有更强的持久性，特别是热带城市。目前的研究结果有助于确定缓解战略，同时改善城市温度的更大幅度和更强的持久性。
附：英文原文
Title: Persistent urban heat
Author: Dan Li, Linying Wang, Weilin Liao, Ting Sun, Gabriel Katul, Elie Bou-Zeid, Bjrn Maronga
Issue&Volume: 2024-04-12
Abstract: Urban surface and near-surface air temperatures are known to be often higher than their rural counterparts, a phenomenon now labeled as the urban heat island effect. However, whether the elevated urban temperatures are more persistent than rural temperatures at timescales commensurate to heat waves has not been addressed despite its importance for human health. Combining numerical simulations by a global climate model with a surface energy balance theory, it is demonstrated here that urban surface and near-surface air temperatures are significantly more persistent than their rural counterparts in cities dominated by impervious materials with large thermal inertia. Further use of these materials will result in even stronger urban temperature persistence, especially for tropical cities. The present findings help pinpoint mitigation strategies that can simultaneously ameliorate the larger magnitude and stronger persistence of urban temperatures.
DOI: adj7398
Source: https://www.science.org/doi/10.1126/sciadv.adj7398