Our Research
Our Research
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Atmospheric composition, climate, and the biosphere have been linked throughout most of Earth's history. Our research probes the chemical evolution of the atmosphere and oceans and past climates states. We study modern environments to elucidate feedbacks between nutrient and carbon cycling in the oceans and controls on bioactive trace gas fluxes. This in turn helps us to model ancient global biogeochemical cycles and interpret the geologic record. Much of our research centers on the following themes:
(1) Phosphorus biogeochemistry and ocean productivity;
(2) Urban atmospheric chemistry and air quality (new);
(3) Carbon monoxide in anaerobic microbial ecosystems (e.g., hot springs, soils) and links to the chemistry of early Earth’s atmosphere;
(4) Couplings between the marine phosphorus cycle, ocean productivity, and atmospheric composition on geologic timescales;
(5) Paleoclimate and paleoaltimetric reconstruction using the δ18O of phosphate and carbonate minerals and Δ47 of carbonate minerals.
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