Seasonal variation of carbonaceous PM2.5 in an Istanbul traffic site
| Autor: | Huseyin Ozdemir, Rosa M. Flores, Alper Unal, Mete Tayanç, Bulent Oktay Akkoyunlu |
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| Přispěvatelé: | Flores, Rosa M., Ozdemir, Hueseyin, Akkoyunlu, Bulent O., Unal, Alper, Tayanc, Mete |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Fine particulate matter
Atmospheric Science 010504 meteorology & atmospheric sciences Turkey Air pollution chemistry.chemical_element 010501 environmental sciences Atmospheric sciences Combustion 01 natural sciences DUST TRANSPORT Megacity Air quality monitoring PM10 medicine Air dispersion Waste Management and Disposal Air quality index Organic carbon 0105 earth and related environmental sciences Total organic carbon Atmospheric motion Seasonality QUANTIFICATION medicine.disease Pollution chemistry OC/EC Environmental science Elemental carbon Carbon |
| Popis: | The seasonal variation of fine carbonaceous aerosol was evaluated in an urban traffic site in Istanbul. PM2.5 samples were collected on selected days during four seasons between Jan 2017–Jan 2018. Daily PM2.5 concentrations were obtained experimentally by the gravimetric method in Besiktas, while hourly concentrations were obtained from the Air Quality Monitoring Network of Istanbul in Catladikapi, Silivri, Kagithane, and Umraniye. Organic carbon (OC) and elemental carbon (EC) concentrations were determined by a thermo-optical carbon analyzer for samples collected in Besiktas. The 24-h US-EPA air quality standard of 35 μg m−3 was exceeded 13, 25, 41, 42, and 57% of the time in Catladikapi, Silivri, Kagithane, Umraniye, and Besiktas, respectively. These exceedances occurred mainly during the fall and winter owing to a combination of emissions from fuel combustion for residential heating, traffic and industry, and poor air dispersion due to weak atmospheric motion and low mixing heights. Average OC concentrations ranged as 6.62–7.32 μg m−3 during spring and summer, and 13.76–14.1 μg m−3 during fall and winter. The OC concentrations observed in this work during the summer and winter were 2–4 and 3–6 times higher than concentrations observed in the USA and Europe, respectively. The EC concentrations did not show considerable seasonal variation, with values between 2.16 and 3.26 μg m−3. EC concentrations in Besiktas were 7 and 9 times higher than concentrations observed in the USA and Europe, in order. Results obtained in this study could be helpful for future implementation of policies and strategies to reduce emissions from combustion sources in order to comply with the air quality standards. |
| Databáze: | OpenAIRE |
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