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McPeters, R.D., Bhartia, P.K., Krueger, A.J., Herman, J.R., Wellemeyer, C.G., Seftor, C.J., Jaross, G., Torres, O., Moy, L., Labow, G., Byerly, W., Taylor, S.L., Swissler, T. and Cebula, R.P. (1998) Earth Probe Total Ozone Mapping Spectrometer (TOMS): Data Products User’s Guide. NASA Technical Publication, 206895.

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• TITLE: Analysis of Long Term Variation of the Total Column and Tropospheric Ozone over the Indian Region

  AUTHORS: C. T. Resmi, T. Nishanth, P. S. Vijoy, M. K. Satheesh Kumar, M. Balachandramohan

  KEYWORDS: Ozone, Indian Sub-Continent, Seasonal Variation, Satellite Data, Wind Profile

  JOURNAL NAME: Atmospheric and Climate Sciences, Vol.11 No.1, January 29, 2021

  ABSTRACT: Ozone plays a significant part in regulating climate change and the chemical characteristics of the atmosphere. Changes in atmospheric ozone can be studied in more detail using ground-based and satellite-based instruments. Studies on the long-term global changes in total column ozone have begun more than three-decade ago using satellite data. The main objective of this work is to analyze the Total Column Ozone (TCO) variations, and tropo-spheric ozone variations over different twenty locations in the Indian sub-continent by using Total Ozone Mapping Spectrometer (TOMS) and AURA OMI/MLS data. The long-term analysis of total column ozone is divided into two phases (1979-1994 and 2005-2018), and tropospheric ozone for one phase (2005-2018) in order to detect changes in the ozone trend pattern. The results of linear regression analysis show a declining trend of total column ozone, and an increasing trend of tropospheric ozone over the selected locations. The impact of wind pattern on the variation of ozone has been analyzed by using NCEP reanalysis data, and found that wind patterns played a prominent role in spatial and temporal changes in total and tropospheric ozone distribution over the subcontinent. Latitudinal variation of total column ozone from Nagarcoil to Anantanag has also been studied for the years 1979, 1994, 2005, and 2018, which indicates an increase in ozone concentration with latitude.