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中国沙漠 ›› 2025, Vol. 45 ›› Issue (2): 294-304.DOI: 10.7522/j.issn.1000-694X.2025.00010

• • 上一篇    

基于能见度和相对湿度估算沙尘浓度的模型构建与检验

海登科1(), 焦瑞莉1, 吴成来2(), 邹杰2, 许永芳3, 段赛男1   

  1. 1.北京信息科技大学 信息与通信工程学院,北京 100101
    2.中国科学院大气物理研究所,北京 100029
    3.国家气象信息中心,北京 100081
  • 收稿日期:2024-10-29 修回日期:2025-01-17 出版日期:2025-03-20 发布日期:2025-03-26
  • 通讯作者: 吴成来
  • 作者简介:海登科(2000-),男,黑龙江齐齐哈尔人,硕士研究生,主要研究方向为气象环境数据智能分析与应用。E-mail: 2022020516@bistu.edu.cn
  • 基金资助:
    国家自然科学基金项目(42075166);北京信息科技大学项目(S2226080)

Development and validation of a regression model for estimating dust concentration from visibility and relative humidity

Dengke Hai1(), Ruili Jiao1, Chenglai Wu2(), Jie Zou2, Yongfang Xu3, Sainan Duan1   

  1. 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:2024-10-29 Revised:2025-01-17 Online:2025-03-20 Published:2025-03-26
  • Contact: Chenglai Wu

摘要:

利用北京地区2021年沙尘天气期间PM10浓度、能见度和相对湿度地面站点观测资料,在详细分析了PM10浓度与能见度、相对湿度关系的基础上,构建了一个基于能见度和相对湿度估算沙尘天气下PM10浓度(即沙尘浓度)的模型。结果表明:沙尘浓度与能见度显著负相关,与相对湿度存在弱的相关性。基于能见度拟合可得到较好的拟合效果(R2>0.9),其中采用幂函数、指数函数组合的分段函数拟合效果更优(R2=0.935,RMSE=231.96 μg·m-3ME=3.22 μg·m-3);进一步引入相对湿度,拟合效果有所提升(R2=0.939,RMSE=224.57 μg·m-3ME=-3.8 μg·m-3)。

关键词: 沙尘天气, PM10浓度, 能见度, 相对湿度, 相关系数

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.

Key words: dust events, PM10 concentration, visibility, relative humidity, correlation coefficient

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