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The oceanic nitrogen (N) cycle has emerged as an important group of processes for investigation of climate-biogeochemistry interactions. Because the major fluxes of oceanic fixed N are involved in the production of N2O and the sequestration of CO2 in the deep ocean, changes in the N cycle may affect the atmospheric abundance of these greenhouse gases over geological time. I have been active in the effort to understand the modern and glacial oceanic N cycle and its role in mediating interactions between climate change and the carbon cycle. My research in this area has focused on constraining the magnitude of the dominant fluxes and feedbacks within the oceanic N cycle by combining models with observed spatial distributions and time-series of N cycle tracers.

biodiversity | nitrogen | carbon | overview