David Trossman, after training as a physical oceanographer, now combines observations, theory, and models in both physical and chemical oceanographic contexts. David received his PhD at the University of Washington in Seattle and took a circuitous route to his current position. In general, his research has taken two trajectories: 1) studying the physical and biogeochemical consequences of ocean circulation and mixing and 2) probing the information content of observable physical and biogeochemical data sources about difficult-to-observe quantities of interest.