Articles | Volume 22, issue 7
https://doi.org/10.5194/acp-22-5017-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-22-5017-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Measurement report: Characterization and source apportionment of coarse particulate matter in Hong Kong: insights into the constituents of unidentified mass and source origins in a coastal city in southern China
Division of Environment and Sustainability, Hong Kong University of
Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
Kin Man Liu
Environmental Central Facility, Hong Kong University of Science and
Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
Claisen Yeung
Environmental Central Facility, Hong Kong University of Science and
Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
Kenneth K. M. Leung
Hong Kong Environmental Protection Department, 15/F, East Wing,
Central Government Offices, 2 Tim Mei Avenue, Tamar, Hong Kong SAR, China
Division of Environment and Sustainability, Hong Kong University of
Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
Department of Chemistry, Hong Kong University of Science and
Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
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Biogenic iodine emission from macroalgae and microalgae could initiate atmospheric new particle formation (NPF). But it is unknown if other species are needed to drive the growth of new iodine particles in the marine boundary layer. Unlike the deeper understanding of organic compounds driving continental NPF, little is known about the organics involved in coastal or open-ocean NPF. This article reveals a new group of important organic compounds involved in this process.
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Short summary
Coarse particulate matter (PM) has been shown to cause adverse health impacts, but compared to PM2.5, the source of coarse PM is less studied through field measurements. We collected chemical composition data for coarse PM in Hong Kong for a 1-year period. Using statistical models, we found that regional transport of fugitive dust is responsible for the elevated coarse PM. This work sets an example of how field measurements can be effectively utilized for evidence-based policymaking.
Coarse particulate matter (PM) has been shown to cause adverse health impacts, but compared to...
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