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Analysis of air pollution in Fenwei Plain in China based on functional spatial autoregressive combined model

Author

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  • Jinxian Tang
  • Xiaoping Shi
  • Xijian Hu

Abstract

The Fenwei Plain is listed as one of the most serious air pollution regions in China, along with Beijing-Tianjin-Hebei and Yangtze River Delta regions. This paper proposed a functional data analysis method to study the environmental pollution problem in the Fenwei Plain of China. Functional spatial autoregressive combined (FSAC) model with spatial autocorrelation of both the response variable and error term is developed. The model takes the SO2 concentration of Fenwei Plain as the dependent variable and the dew point temperature as the independent variable and realizes the maximum likelihood estimation using functional principal component analysis to obtain the asymptotic properties of parameter estimation and the confidence interval of the slope function. According to the findings of the empirical analysis of the Fenwei Plain, the SO2 concentration has significant seasonal characteristics and has decreased year over year for three years in a row. Winter is the season with the highest concentration on the Fenwei Plain, followed by spring and autumn, while summer is the season with the lowest concentration. Winter also has a high spatial autocorrelation. The FSAC model is more effective at fitting the concentration and dew point temperature of the Fenwei Plain in China because its mean square error (MSE) is significantly lower than that of the other models. As a result, this paper can more thoroughly study the pollution problem on the Fenwei Plain and offer guidance for prevention and control.

Suggested Citation

  • Jinxian Tang & Xiaoping Shi & Xijian Hu, 2023. "Analysis of air pollution in Fenwei Plain in China based on functional spatial autoregressive combined model," PLOS ONE, Public Library of Science, vol. 18(5), pages 1-17, May.
    • Handle: RePEc:plo:pone00:0283336
    DOI: 10.1371/journal.pone.0283336
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    References listed on IDEAS

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    1. Yaqiong Wang & Ke Xu & Shaomin Li, 2020. "The Functional Spatio-Temporal Statistical Model with Application to O 3 Pollution in Beijing, China," IJERPH, MDPI, vol. 17(9), pages 1-15, May.
    2. Guojun He & Yuhang Pan & Takanao Tanaka, 2020. "The short-term impacts of COVID-19 lockdown on urban air pollution in China," Nature Sustainability, Nature, vol. 3(12), pages 1005-1011, December.
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