Abstract As a result of ongoing global warming, approximately 30% of the world's population lives in areas where the temperature reaches the death risk threshold at least 20 days a year. The distribution of heat and vulnerability, however, varies in a city; where mitigation actions should begin is a simple question that must be answered. Therefore, it is important to identify hotspots and provide a concrete foundation for the following decision-making process that can be used to integrate urban risk management systems. This paper critically reviewed previous studies from 2006 to 2018 on this subject with the following three main research objectives: (1) What are the definitions and connotations regarding the current discussions on “hotspots”? (2) What are the emerging approaches used to define the threshold, intensity and other properties of hotspots according to their different connotations? (3) Where are the gaps between hotspot recognition and urban heat-related risk management? The results indicate that the concepts, especially related to threshold detection methods, are overcomplicated and vague, suggesting the need for further communication among disciplines.

中文翻译：

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热点、热脆弱性和城市热岛：研究方法的跨学科回顾

摘要 由于持续的全球变暖，世界上大约 30% 的人口每年至少有 20 天生活在温度达到死亡风险阈值的地区。然而，热量和脆弱性的分布在一个城市中有所不同。缓解行动应该从哪里开始是一个必须回答的简单问题。因此，重要的是识别热点并为以下可用于整合城市风险管理系统的决策过程提供具体基础。本文批判性地回顾了 2006 年至 2018 年关于该主题的研究，主要有以下三个研究目标：（1）当前关于“热点”的讨论的定义和内涵是什么？(2) 用于定义阈值的新兴方法是什么？热点的强度和其他属性根据其不同的内涵？（3）热点识别与城市热风险管理的差距在哪里？结果表明，这些概念，尤其是与阈值检测方法相关的概念过于复杂和模糊，表明学科之间需要进一步交流。