1. Surface Ozone in the Yangtze River Delta, China: A Synthesis of Basic Features, Meteorological Driving Factors, and Health Impacts.
- Author
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Zhan, Chenchao, Xie, Min, Liu, Jane, Wang, Tijian, Xu, Meng, Chen, Bing, Li, Shu, Zhuang, Bingliang, and Li, Mengmeng
- Subjects
OZONE ,AIR quality ,METEOROLOGY ,RADIATION - Abstract
Ozone (O3) is of great importance to air quality in the Yangtze River Delta (YRD) region, China. Focusing on surface O3 in the YRD, its spatiotemporal characteristics, meteorological driving factors, and health impacts are investigated based on surface O3 observations in this study. We find that from 2015 to 2019, most cities failed to meet the national standards and O3 pollution mainly occurred in warm seasons (April‐September). Surface O3 in the YRD increased in the recent years, so did tropospheric column O3. Spatially, surface shows a significant positive autocorrelation over the YRD except for 2019, and high O3 values mainly gather in the central of the YRD. The first two empirical orthogonal functions (EOFs) of O3 accounted for 37.4% and 20.0% of the total variance in O3, respectively, with their spatial patterns characterized by the same phase and west and east contrast, respectively. The EOF1 is related to the change in radiation and the EOF2 is attributed to regional transport by prevailing westerly wind. Downward UV radiation, temperature and u wind are crucial factors. The premature mortality caused by O3 for respiratory disease in the YRD is estimated to be 5,889 cases per year. Furthermore, we find that premature mortality is more sensitive to O3 concentration than population, suggesting that controlling peak O3 concentration can bring great health benefits. Key Points: Spatiotemporal characteristics of ozone were investigated based on satellite data and observation network dataThe main meteorological driving factors of ozone were captured using EOF analysisThe premature mortality attributed to ozone was estimated with epidemiological exposure response functions [ABSTRACT FROM AUTHOR]
- Published
- 2021
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