Volume 36 Issue 5
May  2023
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Article Contents
YANG Yike, WANG Xiaohong, LING Yuanjin, LU Qingheng, QIN Jinghao, LI Xiaoyi, YU Lejiang. Spatial-Temporal Evolution of Ozone Pollution and Its Relationship with El Niño-Southern Oscillation in China from 2015 to 2020[J]. Research of Environmental Sciences, 2023, 36(5): 895-903. doi: 10.13198/j.issn.1001-6929.2023.03.03
Citation: YANG Yike, WANG Xiaohong, LING Yuanjin, LU Qingheng, QIN Jinghao, LI Xiaoyi, YU Lejiang. Spatial-Temporal Evolution of Ozone Pollution and Its Relationship with El Niño-Southern Oscillation in China from 2015 to 2020[J]. Research of Environmental Sciences, 2023, 36(5): 895-903. doi: 10.13198/j.issn.1001-6929.2023.03.03

Spatial-Temporal Evolution of Ozone Pollution and Its Relationship with El Niño-Southern Oscillation in China from 2015 to 2020

doi: 10.13198/j.issn.1001-6929.2023.03.03
Funds:  Natural Science Foundation of Shandong Province, China (No.ZR2020MD016)
  • Received Date: 2022-06-21
  • Rev Recd Date: 2022-10-31
  • To study the spatiotemporal evolution characteristics of near-surface ozone (O3) pollution in China from 2015 to 2020 and the effects of El Niño southern Oscillation (ENSO) on it, the temporal and spatial characteristics of O3 pollution and its relationship with ENSO and meteorological factors were investigated based on O3 observed data from nearly 1500 monitoring stations in China from 2015 to 2020 using spatial autocorrelation, hot spot analysis, anomalies analysis, and regression analysis. The result shows that: (1) The agglomeration effect of O3 pollution first intensified from 2015 to 2019, and then dramatically weakened in 2020. (2) The national average O3 concentration first increased from 2015 to 2018, and then decreased from 2018 to 2020. Compared with the previous year, the annual average O3 concentration increased by 8.72% and 1.76% in 2017 and 2018, respectively. It decreased by 3.60% and 3.66% in 2019 and 2020, respectively. In addition, the maximum peak and high-value (daily average value greater than 120 μg/m3) days of O3 concentration in the high O3 concentration aggregated area were higher than those in the low O3 concentration aggregated area, except for 2019 and 2020. (3) In the case of seasonal variations, high O3 concentration typically lasted from April to October each year. In spring and summer, the high O3 concentration area was concentrated in North China, but in autumn, the center gradually shifted to South and southeast China. (4) It was demonstrated that there was a relationship between the positive anomaly of O3 concentration and the ENSO negative phase La Niña, and the negative anomaly of O3 concentration and the ENSO positive phase El Niño. The ENSO-related solar radiation and precipitation anomalies primarily affect the O3 concentration anomaly in southeast China, while the ENSO-related wind speed anomaly primarily affects the O3 concentration anomaly in western and northern China. The study shows that from 2015 to 2020 the national average O3 concentration first increased and then decreased overall. The period of high O3 concentration is mainly in spring and summer. The regions with high O3 concentration vary with seasons. O3 pollution in different regions has different spatiotemporal characteristics, and the effect mechanism of ENSO on O3 pollution is different in different regions of China.

     

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