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Full-coverage mapping and spatiotemporal variations of ground-level ozone (O3) pollution from 2013 to 2020 across China

Open access
Wei, Jing, Li, Zhanqing, Li, Ke, Dickerson, Russell R., Pinker, Rachel T., Wang, Jun, Liu, Xiong, Sun, Lin, Xue, Wenhao, Cribb, Maureen·2022·Remote Sensing of Environment

Abstract

Ozone (O 3 ) is an important trace and greenhouse gas in the atmosphere, posing a threat to the ecological environment and human health at the ground level. Large-scale and long-term studies of O 3 pollution in China are few due to highly limited direct ground and satellite measurements. This study offers a new perspective to estimate ground-level O 3 from solar radiation intensity and surface temperature by employing an extended ensemble learning of the space-time extremely randomized trees (STET) model, together with ground-based observations, remote sensing products , atmospheric reanalysis, and an emission inventory . A full-coverage (100%), high-resolution (10 km) and high-quality daily maximum 8-h average (MDA8) ground-level O 3 dataset covering China (called ChinaHighO 3 ) from 2013 to 2020 was generated. Our MDA8 O 3 estimates (predictions) are reliable, with an average out-of-sample (out-of-station) coefficient of determination of 0.87 (0.80) and root-mean-square error of 17.10 (21.10) μg/m 3 in China. The unique advantage of the full coverage of our dataset allowed us to accurately capture a short-term severe O 3 pollution exposure event that took place from 23 April to 8 May in 2020. Also, a rapid increase and recovery of O 3 concentrations associated with variations in anthropogenic emissions were seen during and after the COVID-19 lockdown, respectively. Trends in O 3 concentration showed an average growth rate of 2.49 μg/m 3 /yr ( p < 0.001) from 2013 to 2020, along with the continuous expansion of polluted areas exceeding the daily O 3 standard (i.e., MDA8 O 3 = 160 μg/m 3 ). Summertime O 3 concentrations and the probability of occurrence of daily O 3 pollution have significantly increased since 2015, especially in the North China Plain and the main air pollution transmission belt (i.e., the “2 + 26” cities). However, a decline in both was seen in 2020, mainly due to the coordinated control of air pollution and ongoing COVID-19 effects. This carefully vetted and smoothed dataset is valuable for studies on air pollution and environmental health in China.

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Metadata

Authors
Wei, J., Li, Z., Li, K., Dickerson, R. R., Pinker, R. T., Wang, J., Liu, X., Sun, L., Xue, W., & Cribb, M.
Venue
Remote Sensing of Environment
Publisher
Elsevier BV
Published
2022-03
Volume
270
Pages
112775
ISSN
0034-4257 (ISSN-L)
OpenAlex
W3190822217
Cited by
683
References
10
FWCI
27.54
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Full-coverage mapping and spatiotemporal variations of ground-level ozone (O3) pollution from 2013 to 2020 across China. https://app.cochat.ai/papers/10.1016/j.rse.2021.112775
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Wei, J., Li, Z., Li, K., Dickerson, R. R., Pinker, R. T., Wang, J., Liu, X., Sun, L., Xue, W., & Cribb, M. (2022). Full-coverage mapping and spatiotemporal variations of ground-level ozone (O3) pollution from 2013 to 2020 across China. Remote Sensing of Environment. https://doi.org/10.1016/j.rse.2021.112775

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