Funds from this grant continue support for Jesse H. Ausubel, Director of Rockefeller University’s Program for the Human Environment, in his role as the Sloan Foundation’s primary liaison to the Deep Carbon Observatory (DCO).  As Sloan’s representative at the DCO, Ausubel serves as a member of the DCO leadership, elicits grant proposals in support of the DCO’s four research communities, oversees progress and reporting on the Foundation’s approximately 30 active DCO grants, represents the Foundation’s policies, priorities, concerns, and aspirations to the DCO leadership, and prepares periodic reports to the Foundation on the DCO’s progress towards its decadal goals.  Grant funds provide primary salary and administrative support for Ausubel and his team’s activities through the anticipated completion of the DCO in 2019, where his work will focus on managing important late-stage DCO projects related to modeling and visualization, intellectual synthesis of DCO discoveries, dissemination of DCO results, and crafting stable institutional and intellectual legacies for the program after Foundation support ends in 2019.