• In a recent version of IITM- ESM, further improvements are incorporated in order to obtain a radiatively-balanced global climate modeling framework, which is required for predicting long-term climate change. Additionally, radiative effects of natural and anthropogenic aerosols are incorporated by specifying time-varying 3-dimensional fields of aerosol optical properties. The IITM- ESM also show improvements in simulating sea ice distribution, ocean biogeochemistry and mean precipitation over Asian monsoon region. The IITM-ESM marks a successful climate modeling development for contributing to the forthcoming CMIP6 with DECK, historic and GMMIP simulations, a first from India