Intriguing aspects of Asian Summer Monsoon Anticyclone Ozone variability from Microwave Limb Sounder measurements

Using the long-term (2005–2019) observations from Microwave Limb Sounder (MLS) onboard Aqua satellite, present study delineates variability of lower stratospheric ozone (LSO) in Asian Summer Monsoon Anticyclone (ASMA) region. The climatological features LSO indicate a peak minimum southern flank ASMA noticed by geopotential measurements MLS. Further, temporal indicates significant interannual during 15 years MLS observations. Our analysis found that two prominent source regions control at time scales region, associated with Pacific and Indian Ocean sea surface temperatures. More importantly, extreme (positive/negative) values anomalies coincide El Niño–Southern Oscillation(El Niño/La Niña) events. composite reveals change mean magnitude about 10 ppb between Niño La Niña phases. results reduced water vapor transport due to subsidence suppressed convection phase leads less mixing across upper troposphere stratosphere, therefore, causing higher concentrations vice-versa phase. Hence, this strong implication for climatic perturbations over