Robert J. Yokelson spends much of his time researching Environmental chemistry, Smoke, Trace gas, Aerosol and Ozone. Robert J. Yokelson applies his multidisciplinary studies on Environmental chemistry and Carbon dioxide in his research. Robert J. Yokelson interconnects Dry season and Pyrolysis in the investigation of issues within Smoke. His Trace gas research focuses on Troposphere and how it connects with Atmospheric models and Mixed layer. Robert J. Yokelson has included themes like Deposition, Atmospheric chemistry, Emission inventory, Outflow and Taiga in his Aerosol study. His Ozone research includes themes of NOx, Plume and Mineralogy.