Spatio-Temporal Heterogeneity of the Relationships Between PM<sub>2.5</sub> and Its Determinants: A Case Study of Chinese Cities in Winter of 2020.

Front Public Health · 2022 · PMC9035510 · PMID 35480572

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an increasing trendno p-value reported

Impacts of Natural Factors The surface pressure (sp) coefficients for the 332 Chinese cites during our study period ( Figure 5A ) showed an increasing trend of coefficients of the sp, with city moving from the north to the southwest of the country.

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a clear trendno p-value reported

In contrast, as cities in China gradually locked down, the daily average national PM 2.5 concentrations showed a clear trend of first increasing and then decreasing, with the value declining to 30.9 μg/m 3 on February 14.

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