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Research

The ocean plays a critical role in the climate system both directly (e.g., by affecting a large poleward transport of heat) and indirectly (e.g., by mediating large fluxes of CO2). The response of ocean circulation and carbon cycling to climate change is a subject of great interest. Much of my research focuses on interpreting recent historical changes in biogeochemical tracers that provide clues to the response of ocean circulation and carbon cycling to climate change. For instance, mounting evidence indicates that oceanic O2 concentrations have undergone significant changes throughout the world's oceans in recent decades, reflecting a global modification of the ocean's biological productivity and/or circulation. By comparing empirical carbon cycle variability to that simulated in dynamically realistic and consistent models, much can be learned about the mechanisms through which climate change impacts the ocean carbon cycle.

biodiversity | nitrogen | carbon | overview

Ocean color image taken from esa.int