Articles | Volume 18, issue 12
https://doi.org/10.5194/gmd-18-3623-2025
https://doi.org/10.5194/gmd-18-3623-2025
Development and technical paper
 | 
19 Jun 2025
Development and technical paper |  | 19 Jun 2025

A novel method for quantifying the contribution of regional transport to PM2.5 in Beijing (2013–2020): combining machine learning with concentration-weighted trajectory analysis

Kang Hu, Hong Liao, Dantong Liu, Jianbing Jin, Lei Chen, Siyuan Li, Yangzhou Wu, Changhao Wu, Shitong Zhao, Xiaotong Jiang, Ping Tian, Kai Bi, Ye Wang, and Delong Zhao

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Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gmd-2024-157', Anonymous Referee #1, 06 Dec 2024
    • AC1: 'Reply on RC1', Hong Liao, 18 Jan 2025
  • CEC1: 'Comment on gmd-2024-157 - No compliance with the policy of the journal', Juan Antonio Añel, 08 Dec 2024
    • CC1: 'Reply on CEC1', Kang Hu, 11 Dec 2024
      • CEC2: 'Reply on CC1', Juan Antonio Añel, 11 Dec 2024
  • RC2: 'Comment on gmd-2024-157', Anonymous Referee #2, 17 Dec 2024
    • AC2: 'Reply on RC2', Hong Liao, 18 Jan 2025

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
AR by Hong Liao on behalf of the Authors (18 Jan 2025)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (07 Feb 2025) by Klaus Klingmüller
RR by Anonymous Referee #2 (24 Feb 2025)
ED: Publish subject to minor revisions (review by editor) (10 Mar 2025) by Klaus Klingmüller
AR by Hong Liao on behalf of the Authors (12 Mar 2025)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (25 Mar 2025) by Klaus Klingmüller
AR by Hong Liao on behalf of the Authors (26 Mar 2025)
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Short summary
This study combines machine learning with concentration-weighted trajectory analysis to quantify regional transport PM2.5. From 2013–2020, local emissions dominated Beijing's pollution events. The Air Pollution Prevention and Control Action Plan reduced regional transport pollution, but the eastern region showed the smallest decrease. Beijing should prioritize local emission reduction while considering the east region's contributions in future strategies.
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