Climate and weather simulations suffer from significant radiation biases over the Southern Ocean, with implications for the global energy balance and multiple aspects of the earth system. As a part of Sonya’s work with the Australian Antarctic Program Partnership, she will addresses the radiation bias in the Australian climate and weather model ACCESS, with a focus on how aerosols affect cloud properties. To do this, Sonya will utilises the growing volume of Southern Ocean atmospheric observations to challenge the model, and identify the underlying processes that need to be improved.