High contribution of new particle formation to ultrafine particles in four seasons in an urban atmosphere in south China
High contribution of new particle formation to ultrafine particles in four seasons in an urban atmosphere in south China
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- dc.contributor.author
- Tao, Li
- Zhou, Zhen
- Tao, Jun
- Zhang, Leiming
- Wu, Cheng
- Li, Jiawei
- Yue, Dingli
- Wu, Zhijun
- Zhang, Zhisheng
- Yuan, Ziyang
- Huang, Junjun
- Wang, Boguang
- dc.date.accepted
- 2023-05-12
- dc.date.accessioned
- 2024-03-01T14:41:04Z
- dc.date.available
- 2024-03-01T14:41:04Z
- dc.date.issued
- 2023-09-01
- dc.date.submitted
- 2023-02-06
- dc.description.abstract - en
- Ultra fine particles (UFP) cover the size range of both nucleation mode particles (NUC, D<sub>p</sub><25 nm) and Aitken mode particles (AIT, 25 nm < D<sub>p</sub> <100 nm), and play important roles in radiative forcing and human health. In this study, we identified new particle formation (NPF) events and undefined events, explored their potential formation mechanism, and quantified their contributions to UFP number concentration (N<sub>UFP</sub>) in urban Dongguan of the Pearl River Delta (PRD) region. Field campaigns were carried out in four seasons in 2019 to measure particle number concentration in the size range of 4.7-673.2nm, volatile organic compounds (VOCs), gaseous pollutants, chemical compositions in PM<sub>2.5</sub>, and meteorological parameters. The frequency of the occurrence of NPF, as indicated by a significant increase in NUC number concentration (NNUC), was 26%, and that of the undefined event, as indicated by substantial increases in NNUC or AIT number concentration (NAIT), was 32% during the whole campaign period. The NPF events mainly occurred in autumn (with a frequency of 59%) and winter (33%) and only occasionally in spring (4%) and summer (4%). On the contrary, the frequencies of the undefined events were higher in spring (52%) and summer (38%) than in autumn (19%) and winter (22%). The burst periods of the NPF events mainly occurred before 11:00 Local Time (LT), while those of the undefined events mainly occurred after 11:00 LT. Accompanied to NPF events were low concentrations of VOCs and high concentrations of O3. The undefined events by NUC or AIT were associated with the upwind transport of newly formed particles. Source apportionment analysis suggested that NPF and undefined events were the largest contributor to N<sub>NUC</sub> (51±28%), N<sub>AIT</sub> (41±26%), and N<sub>UFP</sub> (45±27%), while coal combustion and biomass burning, and traffic emission were the second largest contributor to N<sub>NUC</sub> (22±20%) and N<sub>AIT</sub> (39±28%), respectively.
- dc.identifier.issn
- 1879-1026
- 0048-9697
- dc.identifier.uri
- https://open-science.canada.ca/handle/123456789/1977
- dc.language.iso
- en
- dc.publisher
- Elsevier
- dc.relation.isreplacedby
- https://doi.org/10.1016/j.scitotenv.2023.164202
- dc.rights - en
- Open Government Licence - Canada
- dc.rights - fr
- Licence du gouvernement ouvert - Canada
- dc.rights.openaccesslevel - en
- Green
- dc.rights.openaccesslevel - fr
- Vert
- dc.rights.uri - en
- https://open.canada.ca/en/open-government-licence-canada
- dc.rights.uri - fr
- https://ouvert.canada.ca/fr/licence-du-gouvernement-ouvert-canada
- dc.subject - en
- Nature and environment
- Science and technology
- dc.subject - fr
- Nature et environnement
- Sciences et technologie
- dc.subject.en - en
- Nature and environment
- Science and technology
- dc.subject.fr - fr
- Nature et environnement
- Sciences et technologie
- dc.title - en
- High contribution of new particle formation to ultrafine particles in four seasons in an urban atmosphere in south China
- dc.type - en
- Submitted manuscript
- dc.type - fr
- Manuscrit soumis
- local.article.journaltitle
- Science of The Total Environment
- local.article.journalvolume
- 889
- local.pagination
- 45 pages
- local.peerreview - en
- No
- local.peerreview - fr
- Non
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