Abstract
The frequent occurrence of extreme high temperature weather and heat waves has greatly affected human life. This paper analyzes population exposure and its influencing factors during a heat wave incident in Zhuhai from 6 to 12 September 2021 based on real-time mobile phone data and meteorological data. The results show that the most areas of Zhuhai are affected by high temperature during this heat wave incident. The hourly population exposure is directly proportional to hourly heat wave coverage. In terms of time dimension, the overall population exposure shows a trend of decreasing and then increasing. In terms of spatial dimensions, high population exposure is concentrated in areas such as primary and secondary schools, colleges and universities, office buildings, and residential areas. Low exposure is distributed in most of the mountainous areas along the southern coast. In addition, the leading factors that cause changes in population exposure in different periods of the heat wave cycle are different, which rely more on either climatic factors or population factors.
Highlights
Academic Editors: Xiaodong Yan, In October 2018, the United Nations Intergovernmental Panel on Climate Change (IPCC) stated in its special report “Global Warming of 1.5 ◦ C” that human activities are estimated to have caused global warming to be about 1.0 ◦ C higher than the pre-industrial era, with a possible range of 0.8 ◦ C to 1.2 ◦ C [1]
In China, a day with a maximum temperature ≥35 ◦ C is generally defined as a high temperature incident, and a span of over three consecutive high temperature incidents is defined as heat wave [8]
By drawing on the contribution rate of different influencing factors to the population exposure under the heat wave calculated by other scholars [12], the results suggests that the population exposure of high temperature changes are mainly affected by high temperature weather, population number, and population distribution changes, which can be decomposed into the impact of climate factors, population factors, and the combined effects of population and climate factors
Summary
Academic Editors: Xiaodong Yan, In October 2018, the United Nations Intergovernmental Panel on Climate Change (IPCC) stated in its special report “Global Warming of 1.5 ◦ C” that human activities are estimated to have caused global warming to be about 1.0 ◦ C higher than the pre-industrial era, with a possible range of 0.8 ◦ C to 1.2 ◦ C [1]. The “2021 Global Risk Report” indicates that in the 10 years, incidents caused by extreme weather are one of the top risks to be faced by the world which poses a threat to human well-being [2]. As one of the most typical extreme weather incidents, shows a potential increase in frequency, intensity, and duration under the effects of climate change [3], which causes irreversible destruction to natural environment and a great impact on human life [4,5,6]. Studies show that the frequent occurrence of extreme heat incidents has posed a threat to human health and has a negative impact on people’s daily life and social economic development [9]
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