Effects of urbanization on multiple human perceived temperatures in South China
Effects of urbanization on multiple human perceived temperatures in South China
复制标题
DOI：
10.3389/fenvs.2023.1117443
复制
发表时间：
2023-01
期刊：
影响因子：
--
通讯作者：
Lijie Lin;Meiyu Guo
中科院分区：
文献类型：
--
作者：
Lijie Lin;Meiyu Guo
在全球变暖和城市化等当地人类活动的共同影响下，越来越多的人口面临极端高温事件的威胁。虽然区域城市化对气温及其极端变化的影响已经得到了很好的研究，但对平均和极端人类感知温度（HPT）的影响仍有待探索。基于动态气象站分类方法，以广东省为例，通过分析10个不同的人类感知温度指标，定量评价了城市化对华南地区平均和极端人类感知温度的影响及其相对贡献。研究发现，从1971年到2020年，在所有人类感知温度指标中，华南地区的平均人类感知温度和极端人类感知温度事件的频率显著增加，特别是在当地城市化水平相对较高的地区（例如，珠江三角洲）。城市化对广东平均气温和极端气温的长期变化有显著影响。平均而言，城市化对平均人类感知温度和极端人类感知温度事件频率的总增加的相对贡献分别为15.5%和15.1%。这些贡献因不同的人类感知温度指标而异，城市化对考虑风速综合影响的人类感知温度指标的贡献甚至高于仅与近地表空气温度和湿度相关的指标。在不同季节中，城市化对平均和极端人类感知温度的贡献在秋季和冬季都大于春季和夏季。本文的研究结果为亚热带湿润气候区的政策制定和人类热舒适的适应提供了科学依据。
Under the combined effects of global warming and local human activities such as urbanization, increasing populations are exposed to the threat of extreme heat events. While the effects of regional urbanization on the changes in air temperature and its extremes have been well studied, the effects on mean and extreme human perceived temperatures (HPT) are still to be explored. Based on a dynamic meteorological station classification approach, this study quantitatively assessed the impacts and relative contribution of urbanization on the mean and extreme human perceived temperatures in South China by analyzing ten different human perceived temperatures indicators and taking Guangdong Province as an example. It was found that for all human perceived temperatures indicators, the mean human perceived temperatures and the frequency of extreme human perceived temperatures events in South China notably increased from 1971 to 2020, especially in the regions with comparatively higher levels of local urbanization (e.g., the Pearl River Delta). Urbanization contributed significantly to the long-term changes in both mean and extreme human perceived temperatures in Guangdong. On average, the relative contributions of urbanization to the total increases in mean human perceived temperatures and the frequency of extreme human perceived temperatures events were 15.5% and 15.1%, respectively. These contributions vary across different human perceived temperatures indicators, and the urbanization contributions to the human perceived temperatures indicators that consider the combined effects of wind speed were even higher than those merely related to near-surface air temperature and humidity. Among different seasons, the contributions of urbanization to mean and extreme human perceived temperatures in both fall and winter were greater than that in spring and summer. The findings reported here provide scientific advice for governments’ policy-making and adaption for human-perceived thermal comfort in subtropical humid climate zones.