Ranjit was a Staff Research Associate in the Russell Group. His previous work has focused on theoretical simulations of phase transitions in atmospheric nanoparticles. Over time, Ranjit moved into compiling atmospheric aerosol measurements to provide a cohesive picture of organic carbon from the many organic aerosol sources. Most recently, Ranjit analyzed a large collection of black carbon measurements to address the question, "How is aerosol radiative forcing changing?"