Articles | Volume 14, issue 8
https://doi.org/10.5194/amt-14-5333-2021
https://doi.org/10.5194/amt-14-5333-2021
Research article
 | 
04 Aug 2021
Research article |  | 04 Aug 2021

Estimation of PM2.5 concentration in China using linear hybrid machine learning model

Zhihao Song, Bin Chen, Yue Huang, Li Dong, and Tingting Yang

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This preprint is open for discussion and under review for Atmospheric Chemistry and Physics (ACP).
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Cited articles

Adams, M. D., Massey, F., Chastko, K., and Cupini, C.: Spatial modelling of particulate matter air pollution sensor measurements collected by community scientists while cycling, land use regression with spatial cross-validation, and applications of machine learning for data correction, Atmos. Environ., 230, https://doi.org/10.1016/j.atmosenv.2020.117479, 2020. 
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CGIAR Consortium for Spatial Information: SRTM3, available at: https://srtm.csi.cgiar.org/srtmdata/, CGIAR [data set], last access: 1 July 2021. 
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The linear hybrid machine learning model achieves the expected target well. The overall inversion accuracy (R2) of the model is 0.84, and the RMSE is 12.92 µg m−3. R2 was above 0.7 in more than 70 % of the sites, whereas RMSE and mean absolute error were below 20 and 15 µg m−3, respectively. There was severe pollution in winter with an average PM2.5 concentration of 62.10 µg m−3. However, there was only slight pollution in summer with an average PM2.5 concentration of 47.39 µg m−3.
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