Articles | Volume 20, issue 14
https://doi.org/10.5194/acp-20-8533-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-20-8533-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
22 Jul 2020
Research article |
| 22 Jul 2020
| 22 Jul 2020
Particle number concentrations and size distribution in a polluted megacity: the Delhi Aerosol Supersite study
Shahzad Gani
Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, Texas, USA
Sahil Bhandari
McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas, USA
Kanan Patel
McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas, USA
Sarah Seraj
Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, Texas, USA
Prashant Soni
Department of Civil Engineering, Indian Institute of Technology Delhi, New Delhi, India
Zainab Arub
Department of Civil Engineering, Indian Institute of Technology Delhi, New Delhi, India
Gazala Habib
Department of Civil Engineering, Indian Institute of Technology Delhi, New Delhi, India
McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas, USA
Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, Texas, USA
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30 citations as recorded by crossref.
- Estimation of real-time brown carbon absorption: An observationally constrained Mie theory-based optimization method T. Kapoor et al. 10.1016/j.jaerosci.2022.106047
- Wintertime aerosol properties of urban desert region of western India: Implications in regional climate assessment S. Roy et al. 10.1016/j.scitotenv.2023.161473
- Revisiting the atmospheric particles: Connecting lines and changing paradigms H. Rohra et al. 10.1016/j.scitotenv.2022.156676
- Sources and Dynamics of Submicron Aerosol during the Autumn Onset of the Air Pollution Season in Delhi, India K. Patel et al. 10.1021/acsearthspacechem.0c00340
- A New Physical Mechanism of Rainfall Facilitation to New Particle Formation S. Zhao et al. 10.1029/2023GL106842
- Influence of Aerosol Chemical Composition on Condensation Sink Efficiency and New Particle Formation in Beijing W. Du et al. 10.1021/acs.estlett.2c00159
- Implications of equivalent black carbon heterogeneity in south Indian high-altitude eco-sensitive region B. Logesh et al. 10.1007/s10661-023-11957-5
- Measurement report: Interpretation of wide-range particulate matter size distributions in Delhi Ü. Şahin et al. 10.5194/acp-22-5415-2022
- Observations of particle number size distributions and new particle formation in six Indian locations M. Sebastian et al. 10.5194/acp-22-4491-2022
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- Assessing the accuracy of low-cost optical particle sensors using a physics-based approach D. Hagan & J. Kroll 10.5194/amt-13-6343-2020
- Spatiotemporal profiles of ultrafine particles differ from other traffic-related air pollutants: lessons from long-term measurements at fixed sites and mobile monitoring S. Gani et al. 10.1039/D1EA00058F
- A hybrid model for estimating the number concentration of ultrafine particles based on machine learning algorithms in central Taiwan C. Jung et al. 10.1016/j.envint.2023.107937
- Atmospheric new particle formation in India: Current understanding and knowledge gaps V. Kanawade et al. 10.1016/j.atmosenv.2021.118894
- Source apportionment resolved by time of day for improved deconvolution of primary source contributions to air pollution S. Bhandari et al. 10.5194/amt-15-6051-2022
- Persistence of Primary and Secondary Pollutants in Delhi: Concentrations and Composition from 2017 through the COVID Pandemic K. Patel et al. 10.1021/acs.estlett.1c00211
- Ambient ultrafine particle (PM0.1): Sources, characteristics, measurements and exposure implications on human health S. Abdillah & Y. Wang 10.1016/j.envres.2022.115061
- Black carbon in contrasting environments in India: Temporal variability, source apportionment and radiative forcing B. Romshoo et al. 10.1016/j.atmosenv.2023.119734
- Ammonium Chloride Associated Aerosol Liquid Water Enhances Haze in Delhi, India Y. Chen et al. 10.1021/acs.est.2c00650
- Planetary Boundary Layer Height Modulates Aerosol—Water Vapor Interactions During Winter in the Megacity of Delhi S. S. Raj et al. 10.1029/2021JD035681
- Response of particle number concentrations to the clean air action plan: lessons from the first long-term aerosol measurements in a typical urban valley in western China S. Zhao et al. 10.5194/acp-21-14959-2021
- Factors influencing ambient particulate matter in Delhi, India: Insights from machine learning K. Patel et al. 10.1080/02786826.2023.2193237
- Impact of desert dust on new particle formation events and the cloud condensation nuclei budget in dust-influenced areas J. Casquero-Vera et al. 10.5194/acp-23-15795-2023
- Contributions of primary sources to submicron organic aerosols in Delhi, India S. Bhandari et al. 10.5194/acp-22-13631-2022
- Contrasting Response of Ultrafine Particle Number and PM2.5 Mass Concentrations to Clean Air Action in China S. Zhao et al. 10.1029/2021GL093886
- The contribution of new particle formation and subsequent growth to haze formation M. Kulmala et al. 10.1039/D1EA00096A
- Numerical simulation and evaluation of global ultrafine particle concentrations at the Earth's surface M. Kohl et al. 10.5194/acp-23-13191-2023
- Are Delhi residents exposed to lesser particle number concentration due to the firework ban in the city? K. Rajagopal et al. 10.1007/s11869-024-01532-3
- Evolution of size and composition of fine particulate matter in the Delhi megacity during later winter N. Thamban et al. 10.1016/j.atmosenv.2021.118752
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Latest update: 19 Apr 2024
Short summary
Delhi, India, has had the highest fine particle mass (PM2.5; diameter < 2.5 µm) concentrations of any megacity on the planet in recent years. Here, we undertook a year of detailed measurements of particle size distributions. We observed that the number count of ultrafine particles (diameter < 100 nm) – unlike PM2.5 – is not dramatically elevated in Delhi. Using observations and a simple model, we illustrate how the high amount of PM2.5 in Delhi may suppress ultrafine particle concentrations.
Delhi, India, has had the highest fine particle mass (PM2.5; diameter < 2.5 µm) concentrations of any megacity on the planet in recent years. Here, we undertook a year of detailed measurements of particle size distributions. We observed that the number count of ultrafine particles (diameter < 100 nm) – unlike PM2.5 – is not dramatically...
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