Affiliation:
1. School of Geographical Sciences, China West Normal University, Nanchong 637002, China
2. Sichuan Provincial Engineering Laboratory of Monitoring and Control for Soil Erosion on Dry Valleys, China West Normal University, Nanchong 637002, China
Abstract
It is necessary to alleviate the high temperatures and heat wave disasters in cities in southwest China that are beginning to occur because of global warming. During this study, the spatial and temporal characteristics of heat waves in Nanchong from 1961 to 2022 are analyzed by using the signal smooth method and mutation test. Based on the meteorological data and socioeconomic statistics, the entropy value method is used to obtain the indicator weights to construct a heat wave social vulnerability evaluation index system and conduct vulnerability assessments and classifications. The results show that: ① The heat wave indicators in Nanchong show an increasing trend, although there is a low period of heat waves from 1980 to 1995. Additionally, there are significant mutations in the number of days, frequency, and intensity of high-temperature heat waves from 2009 to 2011, which may be caused by the abnormal high-pressure belt in the mid-latitude. ② The distribution of exposure, sensitivity, and adaptability in Nanchong City, under high temperatures, is uneven in space. Generally, the indicators in the north are lower than those in the south. ③ The high-vulnerability counties are mainly distributed in the east and west of Nanchong, the proportion of the medium social vulnerability index areas are more than a half, while the dominant factor in the distribution pattern is natural factors. ④ The Western Pacific Subtropical High (WPSH) anomaly directly led to the extremely high temperature in Nanchong in the summer of 2022, and the urbanization process index shows a significant positive correlation with the trend of high temperatures and heat waves in Nanchong.
Funder
Regional Cultural Research Center of Sichuan Provincial Social Science Key Research Base Annual Project
National Innovation and Entrepreneurship Training Program for College Students
Educational Reform Project of China West Normal University
Subject
Atmospheric Science,Environmental Science (miscellaneous)
Reference57 articles.
1. (2023, January 28). Climate Change 2021: The Physical Science Basis. Available online: https://www.ipcc.ch/report/ar6/wg1/chapter/summary-for-policymakers/.
2. Global assessment of heat wave magnitudes from 1901 to 2010 and implications for the river discharge of the Alps;Zampieri;Sci. Total Environ.,2016
3. Future population exposure to US heat extremes;Barlough;Nat. Clim. Chang.,2015
4. Substantial increase in heat wave risks in China in a future warmer world;Sun;Earth’s Future,2018
5. Diagnosis features of extreme temperature variations in China based on the NCEP-GEFS reforecasts;Gao;Trans. Atmos. Sci.,2019
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献