 The ocean surface micro-layer, SML, is an important interface between the ocean and the atmosphere, playing a key role in climate change. It is a complex system with many different processes occurring simultaneously, which makes it difficult to study. However, by developing a better understanding of the SML, we can gain insight into how the ocean affects climate change. This article was authored by Anya Engel, Hermann W. Banj, Michael Cunliffe and others.