Influence of Meteorological Parameters on Seasonal Ozone Variation over a Low Latitude Region of Rajasthan

Year : 2026 | Volume : 03 | Issue : 02 | Page : 55 63
By

Vimal Kumar Saraswat,

Pranjal Joshi,

  1. Assistant Professor, Department of Physics, Bhupal Nobles’ University, Udaipu, Rajasthan, India
  2. Research Scholar, Department of Physics, Bhupal Nobles’ University, Udaipur, Rajasthan, India

Abstract

The seasonal variation of total column ozone (TCO) in Ajmer, Rajasthan, India, from 2005 to 2023 using meteorological parameters such earth skin temperature (TS) and relative humidity at 2m depth (RH2m) is investigated in this study. This is satellite and instrument-based data taken from GIOVANNI. For the investigation the data is averaged annually and then grouped into four seasons: winter, pre-monsoon, monsoon, and post-monsoon. There is notable seasonal variation in the total column ozone concentration. TCO levels ranged from 250.9 to 271.7DU in the winter, from 271.4 to 296.8DU in the pre-monsoon, from 271.8 to 285.7DU in the monsoon, and from 259.3 to 276.2DU in the post-monsoon season between 2005 and 2023. It exhibits clear peaks before the monsoon season and troughs during the winter. Pre-monsoon months (March, April, and May) see an average TCO peak value of 283.3DU, while winter months (December, January, and February) see an average TCO minimum value of 261.7DU. TCO levels decline after the monsoon. However, the pre-monsoon period has the lowest RH2m, with 25.87%. However, TCO and RH2m have a weakly positive correlation throughout the year. This correlation between TCO and RH2m is 0.265 prior to the monsoon season. This is because the local microclimate (Pushkar Lake, Ajmer) may marginally increase RH2m, but not enough to have a significant impact on TCO. Additionally, as TS declines, so does the TCO. Similar to the winter season, the lowest TCO (261.7DU) is caused by the lowest average TS (16.58 °C). All seasons show a moderately negative correlation between TCO and TS, however. This is because the direct impact of TCO on TS close to Pushkar Lake, Ajmer, is obscured by local microclimate effects, seasonal fluctuation, and time lags.

Keywords: Total column ozone (TCO), earth skin temperature (TS), relative humidity at 2m depth (RH2m), seasonal variation, climate change

[This article belongs to International Journal of Atmosphere ]

How to cite this article: Vimal Kumar Saraswat, Pranjal Joshi. Influence of Meteorological Parameters on Seasonal Ozone Variation over a Low Latitude Region of Rajasthan. International Journal of Atmosphere. 2026; 03(02):55-63.
How to cite this URL: Vimal Kumar Saraswat, Pranjal Joshi. Influence of Meteorological Parameters on Seasonal Ozone Variation over a Low Latitude Region of Rajasthan. International Journal of Atmosphere. 2026; 03(02):55-63. Available from: https://journals.stmjournals.com/ijat/article=2026/view=259516

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Regular Issue Subscription Original Research
Volume 03
Issue 02
Received 29/05/2026
Accepted 23/06/2026
Published 01/10/2026
Publication Time 125 Days

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