Effect of meteorology and transport on particle concentrations and size distribution in Eastern Mediterranean atmosphere

2022-3-25
Uzunpınar, Elif Sena
This study aims to examine the relationship between particle sizes and processes in the atmosphere and the effect of dust transport on particle size distribution. Number (0.2 μm to 32 μm) and mass (PM1, PM2.5, and PM10) concentrations were collected at rural (Mediterranean coast - Marmaris) and suburban (Central Anatolia - Ankara) stations between April 1, 2017, and October 31, 2018. The coarse particles were more dominant in the Ankara while the Marmaris contained relatively smaller-sized particles. The local source contribution was dominant at the suburban station and the effect of transported particles on the concentrations was masked. The effect of Eastern dust was observed at the suburban station. The seasonality shift in the Saharan dust episodes was observed as they occurred dominantly in winter. The rain events were only effective above PM2.5, showing that they did not lower the effect of PM on human health. PMF analysis of rural station revealed five factors: sea salt, crustal, local anthropogenic, oil combustion, and regional combustion. Coarse particles were dominated by lithophile and chalcophile elements. Secondary inorganic ions, crustal material, and sea salt formed approximately 75% of PM10 mass. North African dust accounted for 55% - 76% of concentrations of lithophile elements, but only 26% of PM10 mass, due to sea salt and secondary ion contribution.

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Citation Formats
E. S. Uzunpınar, “Effect of meteorology and transport on particle concentrations and size distribution in Eastern Mediterranean atmosphere,” Ph.D. - Doctoral Program, Middle East Technical University, 2022.