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Ship-tracks are linear cloud formations resulting from aerosol particles released from ships exhausts in areas of low-level marine clouds. As they represent an isolated impact of ship emissions on cloud properties, investigations of the mechanisms of their formation can provide insights into the effects of large-scale changes in aerosol concentrations on the climate. In my talk, I will discuss how different meteorological factors in the sub-cloud layer affect the dispersion of pollutants, identify key mechanisms affecting droplet concentrations within the cloud layer, and discuss how these link back to observational data from ship track studies. This initial work involves using simple modelling techniques such as plume and cloud parcel models, together with post-processing of observations from satellite retrievals and meteorological data.