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Quantitative Estimation of the Impacts of Precursor Emissions on Surface O[sub.3] and PM[sub.2.5] Collaborative Pollution in Three Typical Regions of China via Multi-Task Learning

Sustainability (Basel, Switzerland), 2024-03, Vol.16 (6) [Peer Reviewed Journal]

COPYRIGHT 2024 MDPI AG ;ISSN: 2071-1050 ;EISSN: 2071-1050 ;DOI: 10.3390/su16062475

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  • Title:
    Quantitative Estimation of the Impacts of Precursor Emissions on Surface O[sub.3] and PM[sub.2.5] Collaborative Pollution in Three Typical Regions of China via Multi-Task Learning
  • Author: Liu, Mengnan ; Ma, Mingliang ; Liu, Mengjiao ; Meng, Fei ; Fu, Pingjie ; Xing, Huaqiao ; Bi, Jingxue ; Zheng, Zhe ; Lv, Yongqiang
  • Subjects: Pollution
  • Is Part Of: Sustainability (Basel, Switzerland), 2024-03, Vol.16 (6)
  • Description: The coordinated control of PM[sub.2.5] and O[sub.3] pollution has become a critical factor restricting the improvement of air quality in China. In this work, precursors and related influencing factors were utilized to establish PM[sub.2.5] and O[sub.3] estimation models in the North China Plain (NCP), the Yangzi River Delta (YRD), and the Pearl River Delta (PRD) using a multi-task-learning (MTL) model. The prediction accuracy of these three MTL models was high, with R[sup.2] values ranging from 0.69 to 0.83. Subsequently, these MTL models were used to quantitatively reveal the relative importance of each factor to PM[sub.2.5] and O[sub.3] collaborative pollution simultaneously. Precursors and meteorological factors were the two most critical influencing factors for PM[sub.2.5] and O[sub.3] pollution in three regions, with their relative importance values larger than 29.99% and 15.89%, respectively. Furthermore, these models were used to reveal the response of PM[sub.2.5] and O[sub.3] to each precursor in each region. In the NCP and the YRD, the two most important precursors of PM[sub.2.5] pollution are SO[sub.2] and HCHO, while the two most critical factors for O[sub.3] pollution are HCHO and NO[sub.2]. Therefore, SO[sub.2] and VOC emissions reduction is the most important measure for PM[sub.2.5] pollution, while VOC and NO[sub.2] emission reduction is the most critical measure for O[sub.3] pollution in these two regions. In terms of the PRD, SO[sub.2] and NO[sub.2] are the most important precursors of PM[sub.2.5] pollution, while the most important precursors for O[sub.3] pollution are HCHO and SO[sub.X], respectively. Thus, NO[sub.2], SO[sub.2], and VOC emission reduction is the most critical measure for PM[sub.2.5] pollution, while VOC and NO[sub.2] emission reduction is the most critical measure for O[sub.3] pollution in the PRD. Overall, this study provides clues and references for the control of PM[sub.2.5] and O[sub.3] collaborative pollution in the NCP, the YRD, and the PRD.
  • Publisher: MDPI AG
  • Language: English
  • Identifier: ISSN: 2071-1050
    EISSN: 2071-1050
    DOI: 10.3390/su16062475
  • Source: Geneva Foundation Free Medical Journals at publisher websites
    ROAD: Directory of Open Access Scholarly Resources
    ProQuest Central
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