دورية أكاديمية
PM 1 composition and source apportionment at two sites in Delhi, India, across multiple seasons
| العنوان: | PM 1 composition and source apportionment at two sites in Delhi, India, across multiple seasons |
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| المؤلفون: | Reyes Villegas, Ernesto, Panda, Upasana, Darbyshire, Eoghan, Cash, James M, Joshi, Rutambhara, Langford, Ben, Di Marco, Chiara F, Mullinger, Neil, Acton, W Joe F, Drysdale, Will, Nemitz, Eiko, Flynn, Michael, Voliotis, Aristeidis, McFiggans, Gordon, Coe, Hugh, Lee, James, Hewitt, C Nicholas, Heal, Mathew R, Gunthe, Sachin S, Mandal, Tuhin K., Shivani, Gadi, Ranu, Singh, Siddhartha, Soni, Vijay, Allan, James |
| المصدر: | Reyes Villegas , E , Panda , U , Darbyshire , E , Cash , J M , Joshi , R , Langford , B , Di Marco , C F , Mullinger , N , Acton , W J F , Drysdale , W , Nemitz , E , Flynn , M , Voliotis , A , McFiggans , G , Coe , H , Lee , J , Hewitt , C N , Heal , M R , Gunthe , S S , Mandal , T K , Shivani , Gadi , R , Singh , S .... |
| سنة النشر: | 2021 |
| المجموعة: | The University of Manchester: Research Explorer - Publications |
| مصطلحات موضوعية: | Aerosol, Aethalometer, Air pollution, Air quality index, Atmospheric sciences, Black carbon, Environmental science, Monsoon, Particulates, Seasonality |
| الوصف: | Air pollution in urban environments has been shown to have a negative impact on air quality and human health, particularly in megacities. Over recent decades, Delhi, India has suffered high atmospheric pollution, with significant particulate matter (PM) concentrations as result of anthropogenic activities. Organic aerosols (OA) are composed of thousands of different chemical species and are one of the main constituents of submicron particles. However, quantitative knowledge of OA composition, their sources and processes in urban environments is still limited. This is important particularly in India, as Delhi is a massive, inhomogeneous conurbation, which we would expect that the apportionment and concentrations will vary depending on where in Delhi the measurements/source apportionment is performed, indicating the need of multi-site measurements. This study presents the first multisite analysis carried out in India over different seasons, with a focus on identifying OA sources. The measurements were taken during 2018 at two sites in Delhi, India. One site was located at the India Meteorological Department, New Delhi (ND). The other site was located at the Indira Gandhi Delhi Technical University for Women, Old Delhi (OD). Non-refractory submicron aerosol (NR-PM1) concentrations (ammonium, nitrate, sulphate, chloride and organic aerosols) of four aerosol mass spectrometers were analysed. Collocated measurements of VOC, black carbon, NOx and CO were performed. Positive matrix factorization (PMF) analysis was performed to separate the organic fraction, identifying a number of conventional factors: hydrocarbon-like OA (HOA) related to traffic emissions, biomass burning OA (BBOA), cooking OA (COA) and secondary OA (SOA). A composition-based estimate of PM1 is defined by combining BC and NR-PM1 (C-PM1 = BC + NR-PM1). No significant difference was observed on C-PM1 concentrations between sites; OD (142 ± 117 µg m−3) compared to ND (123 ± 71 µg m−3), from post-monsoon measurements. A wider variability was observed ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | https://research.manchester.ac.uk/en/publications/a68635d8-14a2-4f39-8728-128e5725d7a5Test |
| DOI: | 10.5194/acp-2020-894 |
| الإتاحة: | https://doi.org/10.5194/acp-2020-894Test https://research.manchester.ac.uk/en/publications/a68635d8-14a2-4f39-8728-128e5725d7a5Test |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.93BEA8BA |
| قاعدة البيانات: | BASE |
| DOI: | 10.5194/acp-2020-894 |
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