Statistical analysis of total column ozone during three recent solar cycles over India

摘要: Abstract Total column ozone (TCO) distribution and its variation over the Indian region at different stations for period of about 30 years from 1986 to 2015 are studied. TCO data is taken merged set (MOD) overpass 15 India. The average correlation between solar proxies such as sunspot number F10.7 cm flux more than 0.5. We further divided time series according cycle 22nd (September July 1996), 23rd (August 1996 November 2008) 24th (December 2008 December 2015) (on going cycle) a 1986–2015. Herein, long term trend analysis TCO, we have removed seasonal effect by deseasonalization process, effects activities, stratospheric waves (quasi-biennial-oscillation-QBO El Nino–Southern Oscillation-ENSO) multifunction linear regression method (MLR). compared both trends in which calculated simple (SLR) deseasonalised (DMLR) analysis. It found that direction similar while, it opposite cycle. observed negative less while positive results indicate after DMLR values decreased large factor. Therefore, role natural variability depleting substances (ODS) on This statistical provides better main objective this work analyze variations with respect recent three cycles.