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This is a Cohort Study study (also classified as: Quantitative Study).

September 24, 2025AtmosphereOpen Access

Temporal Dynamics and Source Apportionment of PM2.5 in a Coastal City of Southeastern China: Insights from Multiyear Analysis

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Analysis reveals key PM2.5 sources and their temporal variations in a coastal Chinese city, suggesting marine regulations are essential.

PM2.5 levels declined 19% from 2013 to 2017, indicating that emission control measures are effective.
The positive matrix factorization model identified secondary sulfate and coal/vehicle emissions as major PM2.5 sources, comprising 59% combined.
Chemical characterization and receptor modeling highlighted the significant impact of regional transport on PM2.5 pollution in Xiamen.
Fugitive dust spikes highlight construction's influence, peaking at 25.8% of PM2.5 in 2015 and emphasizing the need for better urban planning.

Chen et al. (2025) studied this question.

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