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. 2022 Mar 1;6(3):e2021GH000531. doi: 10.1029/2021GH000531

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© 2022 The Authors. GeoHealth published by Wiley Periodicals LLC on behalf of American Geophysical Union.

This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Spatiotemporal variation trends of the annual mean MDA8 O₃ and PM_2.5 concentrations from 2015 to 2020 in China. BTH represents Beijing‐Tianjin‐Hebei region, YRD represents Yangtze River Delta, PRD represents Pearl River Delta.