My research interests lie at the intersection of the marine ecosystem and the physical and biogeochemical environment. I examine how physics and chemistry of the ocean determines phytoplankton biogeography, and how in turn those organisms affect their environment. I am particularly interested in how the interactions of these components of the earth system will change in a warming world. To advance this research I am involved in developing and using complex numerical models and simple theoretical frameworks, guided by laboratory, field and satellite observations.