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Assessment of variation in air quality over Delhi and neighbouring cities of Noida and Greater Noida

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Abstract

The main objective of this study is to recognize the limitations of available data, its usefulness to regulate pollution sources across National Capital Region (NCR) and create winter profiles of every region. Within a network of each air quality monitoring station in Delhi-NCR winters [2019 December–2020 January (Pre-Covid), and 2020 December–2021 January (Post-Covid)], daily-averaged PM10 and PM2.5, NOx, O3, SO2, CO and NH3 levels were found to be very consistent across Delhi and the NCR. The bivariate polar plots revealed that local sources dominate PM10 and PM2.5 concentrations across all monitoring locations in Delhi-NCR. The importance of the local source's superiority aids in the measurement of concentrations. We examined the various pollutants found during the winter season across Delhi-NCR for 2019–2020–2021. Plotting bivariate polar plots can reveal the relationship between air contaminants and meteorological conditions. This technique identified the concentration level and also helps in prediction. The preliminary results also suggested that the air pollutants considerably reduced in post-covid period as compared to the pre-covid period due to the restriction of traffic and commercial activities.

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Acknowledgements

The authors are grateful to India Meteorological Department (IMD) for providing the facilities and the workplace for the accomplishment of this research work. The authors are also thankful to CPCB, DPCC and UPPCB for providing data.

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Authors and Affiliations

  1. India Meteorological Department, Ministry of Earth Sciences, New Delhi, India

    Deepak Sharma & V K Soni

  2. Department of Basic Sciences, School of Basic and Applied Sciences, Galgotias University, Greater Noida, UP, India

    Deepak Sharma & Subhalaxmi Pradhan

Authors
  1. Deepak Sharma
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  2. V K Soni
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  3. Subhalaxmi Pradhan
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Contributions

Deepak Sharma: Conducting experiments, software, analysis and interpretation of data, writing – original draft. V K Soni: Supervised the overall work, and provided infrastructure facilities. Subhalaxmi Pradhan: Supervision, conceptualization, reviewing and editing the manuscript.

Corresponding author

Correspondence to Subhalaxmi Pradhan.

Additional information

Communicated by Suresh Babu

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Sharma, D., Soni, V.K. & Pradhan, S. Assessment of variation in air quality over Delhi and neighbouring cities of Noida and Greater Noida. J Earth Syst Sci 131, 155 (2022). https://doi.org/10.1007/s12040-022-01902-4

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  • DOI: https://doi.org/10.1007/s12040-022-01902-4

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