Upper Troposphere-Lower Stratosphere Trace Gas Response to the Asian Summer Monsoon Circulation

The Asian monsoon anticyclone is a dominant circulation in the upper troposphere and lower stratosphere of the Northern Hemisphere during the summer monsoon (JJAS). Satellite observations from Microwave Limb Sounder (MLS) and Atmospheric Chemistry Experiment (ACE) shows isolation of pollutants (CO, HCN,) within the anticyclone from their convective up-lift and followed by the long-range transport. Since 2014, we conducted a series of balloon borne observations over India from three different stations, Gadanki (13.45^oN, 79.18^oE), Hyderabad (17.47^oN, 79.17^oE) and Varanasi (22.27^o N, 78.5^o E) to study the trace gases and aerosols in the Upper Troposphere and Lower Stratosphere (UTLS) under ISRO-NASA BATAL Campaigns. We launched in-situ balloon-borne sondes including Radiosonde, ozonesonde, Cryogenic frost Point Hygrometer (CFH), Compact optical Backscatter Aerosol Detector (COBALD) and Optical Particle Counters during these campaigns. We study the variability of ozone and water vapor by combining in-situ measurement, trajectory calculations and satellite observations from SAGE III/ ISS, MLS and INSAT 3D. Several in-situ observations show higher concentration of ozone in the UTLS region and water vapor in the lower stratosphere.