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  • CN 62-1070/P
  • ISSN 1000-694X
  • Bimonthly 1981
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Development and validation of a regression model for estimating dust concentration from visibility and relative humidity

  • Dengke Hai ,
  • Ruili Jiao ,
  • Chenglai Wu ,
  • Jie Zou ,
  • Yongfang Xu ,
  • Sainan Duan
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  • 1.College of Information and Communication Engineering,Beijing Information Science and Technology University,Beijing 100101,China
    2.Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China
    3.National Meteorological Information Center,Beijing 100081,China

Received date: 2024-10-29

  Revised date: 2025-01-17

  Online published: 2025-03-26

Abstract

In this study, we develop a regression model for dust concentrations based on the ground station observation data of PM10 concentration, visibility and relative humidity during dust events in Beijing in 2021. After a detailed analysis of the relationship among the three elements (i.e., PM10 concentration, visibility, and relative humidity), we found that dust concentration has a significant negative correlation with visibility and a weak correlation with relative humidity. When only visibility was used for fitting, dust concentration can be estimated reasonably with the determination coefficient R2 greater than 0.9, and the piecewise function combining power function and exponential function has the better fitting results, with a R2 of 0.935, a root mean square error (RMSE) of 231.96 μg·m-3, and a mean error (ME) of 3.22 μg·m-3. Introducing relative humidity further improves the fitting performance, with R2 increased to 0.939, RMSE reduced to 224.57 μg·m-3, and ME being -3.8 μg·m-3.

Cite this article

Dengke Hai , Ruili Jiao , Chenglai Wu , Jie Zou , Yongfang Xu , Sainan Duan . Development and validation of a regression model for estimating dust concentration from visibility and relative humidity[J]. Journal of Desert Research, 2025 , 45(2) : 294 -304 . DOI: 10.7522/j.issn.1000-694X.2025.00010

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