Articles | Volume 20, issue 11
https://doi.org/10.5194/acp-20-6953-2020
© 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-20-6953-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
12 Jun 2020
Research article |
| 12 Jun 2020
| 12 Jun 2020
Air mass physiochemical characteristics over New Delhi: impacts on aerosol hygroscopicity and cloud condensation nuclei (CCN) formation
Department of Civil Engineering, Indian Institute of Technology
Delhi, New Delhi, India
Sahil Bhandari
McKetta Department of Chemical Engineering, The University of Texas
at Austin, Austin, Texas, USA
Shahzad Gani
Department of Civil, Architectural and Environmental Engineering, The
University of Texas at Austin, Austin, Texas, USA
Joshua S. Apte
Department of Civil, Architectural and Environmental Engineering, The
University of Texas at Austin, Austin, Texas, USA
Lea Hildebrandt Ruiz
McKetta Department of Chemical Engineering, The University of Texas
at Austin, Austin, Texas, USA
Gazala Habib
Department of Civil Engineering, Indian Institute of Technology
Delhi, New Delhi, India
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32 citations as recorded by crossref.
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32 citations as recorded by crossref.
- Enhanced secondary aerosol formation driven by excess ammonia during fog episodes in Delhi, India P. Acharja et al. 10.1016/j.chemosphere.2021.133155
- Assessment of PM10 and PM2.5 over Ghaziabad, an industrial city in the Indo-Gangetic Plain: spatio-temporal variability and associated health effects L. Gupta et al. 10.1007/s10661-021-09411-5
- Atmospheric rivers fueling the intensification of fog and haze over Indo-Gangetic Plains S. Verma et al. 10.1038/s41598-022-09206-9
- Particle Number Size Distribution of Wintertime Alpine Aerosols and Their Activation as Cloud Condensation Nuclei in the Guanzhong Plain, Northwest China Y. Chen et al. 10.1029/2022JD037877
- Seasonal variability in size-resolved hygroscopicity of sub-micron aerosols over the Western Ghats, India: Closure and parameterization A. Ray et al. 10.1016/j.scitotenv.2023.161753
- Water vapour characteristics and radiative effects at high-altitude Himalayan sites U. Dumka et al. 10.1016/j.apr.2021.101303
- Identification of key aerosol types and mixing states in the central Indian Himalayas during the GVAX campaign: the role of particle size in aerosol classification U. Dumka et al. 10.1016/j.scitotenv.2020.143188
- Evaluation of PM2.5 spatio-temporal variability and hotspot formation using low-cost sensors across urban-rural landscape in lucknow, India S. Madhwal et al. 10.1016/j.atmosenv.2023.120302
- Role of Aerosol Physicochemical Properties on Aerosol Hygroscopicity and Cloud Condensation Nuclei Activity in a Tropical Coastal Atmosphere A. T. C. et al. 10.1021/acsearthspacechem.2c00044
- Fireworks induced quasi-ultrafine particle number concentration and size-resolved elemental distribution in megacity Delhi S. Yadav et al. 10.1007/s12517-021-09385-1
- Inter- versus Intracity Variations in the Performance and Calibration of Low-Cost PM2.5 Sensors: A Multicity Assessment in India S. V et al. 10.1021/acsearthspacechem.2c00257
- Numerical simulation of the microphysics and liquid chemical processes occur in fog using size resolving bin scheme J. Bodaballa et al. 10.1016/j.atmosres.2021.105972
- Air pollution in New Delhi is more severe than observed due to hygroscopicity-induced bias in aerosol sampling Y. Chen 10.1038/s44407-024-00001-6
- Indoor air quality assessment of particulate matter levels in urban homes in India P. Vijay et al. 10.1016/j.apr.2025.102553
- Measurement report: Altitudinal variation of cloud condensation nuclei activation across the Indo-Gangetic Plain prior to monsoon onset and during peak monsoon periods: results from the SWAAMI field campaign M. Manoj et al. 10.5194/acp-21-8979-2021
- Planetary Boundary Layer Height Modulates Aerosol—Water Vapor Interactions During Winter in the Megacity of Delhi S. S. Raj et al. 10.1029/2021JD035681
- Long-term observations of cloud condensation nuclei (CCN) characteristics of atmospheric aerosols: Results from a rural location in India T. Jayasri et al. 10.1016/j.atmosenv.2024.120630
- Propagation of cloud base to higher levels during Covid-19-Lockdown L. R. et al. 10.1016/j.scitotenv.2020.144299
- Characteristics and atmospheric processes of water-soluble ions in PM2.5 and PM10 over an industrial city in the National Capital Region (NCR) of India L. Gupta et al. 10.1016/j.atmosenv.2023.120020
- Seasonal variations in aerosol characteristics from local pollution and long-range transport at the northern tip of Taiwan T. Chen et al. 10.1186/s42834-025-00250-4
- Factors influencing ambient particulate matter in Delhi, India: Insights from machine learning K. Patel et al. 10.1080/02786826.2023.2193237
- Measurement report: Hygroscopicity of size-selected aerosol particles in the heavily polluted urban atmosphere of Delhi: impacts of chloride aerosol A. Mandariya et al. 10.5194/acp-24-3627-2024
- Analysis of aerosol liquid water content and its role in visibility reduction in Delhi U. Ali et al. 10.1016/j.scitotenv.2023.161484
- 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
- Semi-volatile oxygenated organics and ammonium chloride increasing sub-micron aerosol hygroscopicity, cloud condensation nuclei and PM1 mass in the Delhi region V. Lalchandani et al. 10.1016/j.atmosenv.2025.121356
- Ammonium Chloride Associated Aerosol Liquid Water Enhances Haze in Delhi, India Y. Chen et al. 10.1021/acs.est.2c00650
- Highly significant impact of mineral dust on aerosol hygroscopicity at New Delhi Z. Arub et al. 10.1016/j.atmosenv.2021.118375
- Contributions of primary sources to submicron organic aerosols in Delhi, India S. Bhandari et al. 10.5194/acp-22-13631-2022
- Unraveling the influence of varied airflow patterns on atmospheric instabilities, rain microphysics, and cloud features over Delhi, the capital city of India G. Rakshit et al. 10.1016/j.asr.2024.01.026
- Cloud activation properties of aerosol particles in a continental Central European urban environment I. Salma et al. 10.5194/acp-21-11289-2021
- Wet deposition of total nitrogen, dissolved organic carbon and heavy metals investigating role of long-range transport at two sites in Delhi S. S. & U. Kulshrestha 10.1007/s10874-023-09453-8
- Long-Term Dynamics of Atmospheric Sulfur Dioxide in Urban and Rural Regions of China: Urbanization and Policy Impacts F. Wang et al. 10.3390/rs16020391
Latest update: 09 Jul 2025
Short summary
Aerosol physiochemical properties were characterized for three prominent air masses over New Delhi, a highly polluted megacity. The chemical composition and size distribution data were used to deduce the hygroscopicity parameter and cloud condensation nuclei (CCN) number concentration. The activated fraction was the highest in the world for any continental site. The aerosol physiochemical properties and their diurnal patterns were interlinked and impacted aerosol hygroscopicity and CCN activity.
Aerosol physiochemical properties were characterized for three prominent air masses over New...
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