Continuous increases of surface ozone and associated premature mortality growth in China during 2015-2019

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Abstract

Ambient ozone (O3) pollution has become a big issue in China. Recent studies have linked long- and short-term O3 exposure to several public health risks. In this study, we (1) characterize the long-term and short-term O3-attributed health metric in China from 2015-2019; (2) estimate the surface O3 trends; and (3) quantify the long-term and short-term health impacts (i.e. all-cause, cardiovascular and respiratory mortality) in 350 urban Chinese cities. In these 5-years, the national annual average of daily maximum 8h average (AVGDMA8) O3 concentrations and warm-season (April−September) 4th highest daily maximum 8h average (4DMA8) O3 concentrations increased from 74.0±15.5 μg/m3 (mean±standard deviation) to 82.3±12.0 μg/m3 and 167±37.0 μg/m3 to 174±30.0 μg/m3 respectively. During this period, the DMA8 O3 concentration increased by 1.9±3.3 μg/m3/yr across China, with over 70% of the monitoring sites showing a positive upward trend and 19.4% with trends >5 μg/m3/yr. The estimated long-term all-cause, cardiovascular and respiratory premature mortalities attributable to AVGDMA8 O3 exposure in 350 Chinese cities were 181,000 (95% CI: 91,500-352,000), 112,000 (95% CI: 38,100-214,000) and 33,800 (95% CI: 0-71,400) in 2019, showing increases of 52.5%, 52.9% and 54.6% respectively compared to 2015 levels. Similarly, short-term all-cause, cardiovascular and respiratory premature mortalities attributed to ambient 4DMA8 O3 exposure were 156,000 (95% CI: 85,300-227,000), 73,500 (95% CI: 27,500-119,000) and 28,600 (95% CI: 14,500-42,800) in 2019, increases of 19.6%, 19.8% and 21.2% respectively compared to 2015. The results of this study are important in ascertaining the effectiveness of recent emission control measures and to identify the areas that require urgent attention.
Original languageEnglish
Article number116183
JournalEnvironmental Pollution
Volume269
Early online date30 Nov 2020
DOIs
Publication statusPublished - 15 Jan 2021

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