SEANA aims to understand the sources of aerosol particles including the contribution from shipping and to determine the response of Arctic and North Atlantic aerosols to future shipping emissions. SEANA coordinated a research cruise, on RRS Discovery, to the west side of Greenland to measure both natural and anthropogenic particles and understanding aerosol processes. Measurements were also conducted at two stations adjacent to the Northwester Passage (Faroe Islands and Thule). These observations were used to update and improve a global aerosol model to better reproduce current "baselines". The updated model will be used to predict the impacts of future shipping on air quality, clouds and radiative forcing in the Arctic and North Atlantic Ocean.