成渝地区双城经济圈县域高温热浪脆弱性空间分异格局及主导类型研究

Study on the Spatial Differentiation Pattern and Dominant Type of High Temperature Heat Wave Vulnerability in Counties of Chengdu-Chongqing Economic Circle

摘要: 随着全球气候变化，极端高温事件发生的频率与强度持续增加，对居民健康产生重要影响。本文基于县域尺度，从暴露度、敏感性和适应能力3个维度构建成渝地区双城经济圈县域高温热浪脆弱性评价指标体系，探究研究区内高温热浪脆弱性空间分布特征及其主导类型，并进一步提出差异化的适应性规划策略。结果发现：1) 成渝地区双城经济圈的暴露度指数空间分布呈现自西向东递增的梯度分异特征；敏感性指数空间分布呈现显著的逆核心–边缘结构；适应能力指数呈现核心–外围分异格局；高温脆弱性分布大体上呈现西低东高，还存在以重庆市主城区为核心的核心–外围结构；2) 研究区内高温脆弱性主导类型有8类，且以综合主导型、低脆弱型、适应能力不足型及潜在脆弱型为主；3) 研究区脆弱性主导类型的分布具有一定的空间集聚特征，其分异特点是自然条件、经济结构、社会资源等多因素综合作用的结果。

Abstract: With global climate change, the frequency and intensity of extreme heat events continue to increase, which has a significant impact on residents’ health. This article is based on the county-level scale, and constructs a vulnerability evaluation index system for high-temperature heat waves in the Chengdu Chongqing Economic Circle from three dimensions: exposure, sensitivity, and adaptability. It explores the spatial distribution characteristics and dominant types of high-temperature heat wave vulnerability in the study area, and further proposes differentiated adaptive planning strategies. The results showed that: 1) The spatial distribution of the exposure index of the Chengdu Chongqing economic circle in the Chengdu Chongqing region exhibited a gradient differentiation characteristic increasing from west to east; the spatial distribution of sensitivity index shows a significant inverse core edge structure; the adaptability index shows a core periphery differentiation pattern; the distribution of high temperature vulnerability is generally low in the west and high in the east, with a core periphery structure centered around the main urban area of Chongqing. 2) There are 8 dominant types of high-temperature vulnerability in the research area, mainly including comprehensive dominant type, low vulnerability type, insufficient adaptability type, and potential vulnerability type. 3) The distribution of dominant types of vulnerability in the research area has certain spatial clustering characteristics, and its differentiation characteristics are the result of the comprehensive effects of multiple factors such as natural conditions, economic structure, and social resources.