Journal of Shandong University (Health Sciences) ›› 2021, Vol. 59 ›› Issue (12): 158-164.doi: 10.6040/j.issn.1671-7554.0.2021.0786

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Trend of heatwave events and population exposure levels in China from 2005 to 2017

LU Kailai1,2, BAN Jie2, FEI Xianyun1, ZHOU Zhen1,2, LI Tiantian2   

  1. 1. School of Marine Technology and Geomatics, Jiangsu Ocean University, Lianyungang 222005, Jiangsu, China;
    2. China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing 100021, China
  • Published:2021-12-29

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Abstract: Objective To explore the temporal and spatial trends of heatwave events and population exposure levels in China from 2005 to 2017. Methods The daily average temperature reanalysis data set of 2,901 districts and counties in China from 2005 to 2017 were assessed with relative threshold definition to analyze the number of districts and counties where heatwave events occurred, frequency of occurrence, total heatwave days, and spatial and temporal distribution characteristics of average duration of a single event. The population-weighted heatwave daily exposure was calculated based on national population data. Results From 2005 to 2017, the impact of heatwave events in China showed an increasing trend. The heatwave events in 2010, 2013, 2016 and 2017 had the largest overall impact. Population exposure to heatwave events was higher in provinces along the Yangtze River Basin than in other regions, with Shanghai having the highest average annual population-weighted heatwave daily exposure, followed by Zhejiang Province. Conclusion Chinas heatwave events show an upward trend in time and an expanding trend in space, and the Yangtze River Basin is the population exposure area of heat wave events.

Key words: Heatwave event, Temporal and spatial trends, Frequency, Days of heatwave, Population-weighted exposure

CLC Number: 

  • R122
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