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- W3184574670 abstract "Present study investigates the temporal and diurnal variations of Black Carbon (BC) and quantifies the contribution of fossil fuel (BC ff ) combustion and biomass burning (BC bb ) to the BC concentrations in Delhi using the Aethalometer model. The average BC mass concentration and Absorption Angstrom Exponent were 12.6 ± 8.2 μg/m 3 (range: 1.73–37.0 μg/m 3 ) and 1.30 ± 0.16 (range: 1.06–1.82), respectively. The average BC ff and BC bb mass concentrations were 7.90 ± 4.98 μg/m 3 (range: 1.13–19.98 μg/m 3 ) and 4.73 ± 5.23 μg/m 3 (range: 0.21–26.85 μg/m 3 ), respectively. The contribution of BC bb was 31.15% and BC ff was 68.85% to the overall BC concentration in the study period. The highest BC bb contribution, amounting to 52.04%, was found in the month of November (stubble burning season). The effect of Diwali firecrackers on BC concentrations was also investigated which was transient, lasted for few hours only. The probable major source regions of BC to the receptor site were Rajasthan, Gujarat, Punjab, Indo-Gangetic Plain and parts of Pakistan during monsoon season while Punjab, Haryana, and parts of Uttar Pradesh during post-monsoon season. The results revealed that the biomass burning activities in Punjab and Haryana contribute significantly to the Delhi's post-monsoon air pollution suggesting urgency to implement the carbonaceous aerosols emission abatement strategies over northern India. • BC mass concentration was measured during August–November 2020. • Biomass burning events were very high during present study in comparison to 2019. • BC associated with vehicular emission was found dominant during August and September. • Biomass burning activities contributed the highest BC mass concentration during November. • Diwali firework transitorily affected the BC mass concentration and lasts few hours only." @default.
- W3184574670 created "2021-08-02" @default.
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- W3184574670 date "2021-09-01" @default.
- W3184574670 modified "2023-10-16" @default.
- W3184574670 title "Source apportionment of black carbon over Delhi: A case study of extreme biomass burning events and Diwali festival" @default.
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- W3184574670 doi "https://doi.org/10.1016/j.uclim.2021.100926" @default.
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