The Arctic Ocean 2018 takes place between 31 July and 25 September 2018 and will explore the nexus between microbial life in the ocean, atmospheric composition, clouds and climate. PSI is participating in the project “Microbiology Ocean Cloud Coupling in the High Arctic” (MOCCHA). This blog will provide snapshots of our experiences during the expedition to the extent possible as means of communication are limited. For detailed information on the Arctic Ocean project, check out the project webpage.