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• W2892262313 endingPage "1367" @default.
• W2892262313 startingPage "1360" @default.
• W2892262313 abstract "This study developed a lightweight air composition measuring equipment (ACME) mounted in unmanned aerial vehicles (UAVs) to measure the vertical distribution characteristics of PM2.5 chemical species in the micro-scale urban environment for the first time. 212 samples collected from 0 to 350 m above ground level were analyzed for water-soluble ions. The concentrations of most ions on the above ground level were higher than that on the ground surface during the sampling period. The measurements of the total ion concentrations were approximately 54 to 26% of the PM2.5 mass concentrations on the ground surface. The concentrations of NH4+ and NO3− decreased with increases in the height from the ground, which may be related to the influence of the vehicle emissions and human activities. NO2− and SO42− both had a peak concentration on the higher vertical altitude at night in the sea-land wind system. In the southern wind system, the emissions of sea salts, dust, and stationary pollution, might be transported by the regional prevailing airflow from the southern coastal area, were the major pollutant sources above the boundary layer. The vertical distribution of ionic concentrations and wind field provided information concerning changes in pollutant transport and source regions that affect the local air quality. The ACME mounted in UAVs is the feasible and convenient method to fast understand the vertical distributions of aerosol chemical species. It provides important information about the accumulation and diffusion effects by the boundary layer variation to aerosol characteristics, which is difficulty observed from the conventional ground-based measurements. In future, this technology is the useful application for investigating the pollutant species emitted from the smokestack and the sudden pollution accident." @default.
• W2892262313 created "2018-09-27" @default.
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• W2892262313 date "2018-12-01" @default.
• W2892262313 modified "2023-10-02" @default.
• W2892262313 title "Determination of the vertical profile of aerosol chemical species in the microscale urban environment" @default.
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• W2892262313 doi "https://doi.org/10.1016/j.envpol.2018.09.081" @default.
• W2892262313 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30273862" @default.
• W2892262313 hasPublicationYear "2018" @default.
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