Our Research
Deep Biosphere
We are investigating the types of biogeochemical processes catalyzed by the subsurface marine biosphere and the role that this community plays in global cycling of important elements including nitrogen, oxygen and carbon.
Nitrous Oxide in Coastal Ecosystems
We are working to improve our understanding of the controls on N2O dynamics in coastal sediments, including distinguishing between biotic and abiotic processes and the controls on the relative proportion of these distinctive processes.
Nitrogen-Iron
Redox transformations of iron often occur in close proximity to many redox transformations in the nitrogen cycle. We are exploring the way in which these cycles are linked through both biologically-catalyzed and chemically-catalyzed processes – and the implications of these processes for the fate of nitrogen pollution and greenhouse gas production.
Hydrothermal Vents
These environments offer unique windows into the subsurface biosphere, where microbial communities thrive under extreme conditions. We are actively investigating sources and cycling of key nitrogen and carbon substrates across a variety of hydrothermal vent systems.
In-Situ Geochemical Instrumentation
In order to expand the range of questions we can ask about biogeochemical processes in the deep-sea, we work to develop new analytical tools that enable in situ measurements of concentrations and stable isotope ratios of key compounds including methane and carbon dioxide
Manganese Oxides
We are exploring the utility of manganese oxide minerals as records of oxidation mechanisms – with implications for biosignatures on Earth and beyond.
Our Most Recent Publications
Rapid mapping of methane and carbon dioxide in coastal ecosystems using the ChemYak, an autonomous surface vehicle
Improved efficiency of the biological pump as a trigger for the late Ordovician glaciation
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