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Spatiotemporal Evolution and Prediction of AOT in Coal Resource Cities: A Case Study of Shanxi Province, China

Author

Listed:
  • Yan Tang

    (School of Management, Tianjin University of Technology, Tianjin 300384, China)

  • Rui Xu

    (School of Management, Tianjin University of Technology, Tianjin 300384, China)

  • Mengfan Xie

    (School of Management, Tianjin University of Technology, Tianjin 300384, China)

  • Yusu Wang

    (School of Management, Tianjin University of Technology, Tianjin 300384, China)

  • Jian Li

    (College of Management and Economy, Tianjin University, Tianjin 300072, China)

  • Yi Zhou

    (School of Management, Tianjin University of Technology, Tianjin 300384, China)

Abstract

As aerosols in the air have a great influence on the health of residents of coal resource-based cities, these municipalities are confronting the dilemma of air pollution that is caused by the increase of suspended particles in the atmosphere and their development process. Aerosol optical thickness could be used to explore the aerosol temporal and spatial variations and to develop accurate prediction models, which is of great significance to the control of air pollution in coal resource-based cities. This paper explored the temporal spatial variation characteristics of aerosols in coal resource-based regions. A total of 11 typical coal-resource prefecture-level cities in the Shanxi Province were studied and inverted the aerosol optical thickness (AOT) among these cities based on MODIS (Moderate Resolution Imaging Spectroradiometer) data and analyzed the significant factors affecting AOT. Through inputting significant correlation factors as the input variables of NARX (nonlinear auto regressive models with exogenous inputs) neural network, the monthly average AOTs in the Shanxi Province were predicted between 2011 and 2019. The results showed that, in terms of time series, AOT increased from January to July and decreased from July to December, the maximum AOT was 0.66 in summer and the minimum was 0.2 in autumn, and it was related to the local monsoon, temperature, and humidity. While as far as the space alignment is concerned, the figure for AOT in Shanxi Province varied significantly. High AOT was mainly concentrated in the centre and south and low AOT was focused on the northwestern part. Among the positively correlated factors, the correlation coefficient of population density and temperature exceeded 0.8, which was highly positive, and among the negatively correlated factors, the correlation coefficient of NDVI exceeded -0.8, which was highly negative. After improving the model by adding the important factors that were mentioned before, the error between the predicted mean value and the actual mean value was no more than 0.06. Considering this charge, the NARX neural network with multiple inputs can contribute to better prediction results.

Suggested Citation

  • Yan Tang & Rui Xu & Mengfan Xie & Yusu Wang & Jian Li & Yi Zhou, 2022. "Spatiotemporal Evolution and Prediction of AOT in Coal Resource Cities: A Case Study of Shanxi Province, China," Sustainability, MDPI, vol. 14(5), pages 1-15, February.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:5:p:2498-:d:755384
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    References listed on IDEAS

    as
    1. Edelmann, Dominic & Móri, Tamás F. & Székely, Gábor J., 2021. "On relationships between the Pearson and the distance correlation coefficients," Statistics & Probability Letters, Elsevier, vol. 169(C).
    2. Li, Li & Lei, Yalin & Wu, Sanmang & He, Chunyan & Yan, Dan, 2018. "Study on the coordinated development of economy, environment and resource in coal-based areas in Shanxi Province in China: Based on the multi-objective optimization model," Resources Policy, Elsevier, vol. 55(C), pages 80-86.
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