Debbie Thomas - Home Page

Debbie on the bow of the JOIDES Resolution

Research Overview

My primary research interest is paleoceanography of the Cretaceous and Cenozoic, particularly in using the deep-sea sedimentary record to investigate the relationship between global tectonism and the evolution of the earth's climate system.  I am particularly interested in all aspects of fundamentally warm climates, and the transitions between "greenhouse" and "icehouse" climate states. This interest has led me further back in time to investigate greenhouse-icehouse transitions during the Paleozoic as well. I use radiogenic isotopes, stable isotopes, and trace element geochemistry to investigate the 1) potential regulating role of thermohaline circulation on global climate under different boundary conditions; 2) the evolution of wind intensity and eolian sediment source variability through the Cretaceous and Paleogene; 3) the role of tectonics (e.g., oceanic gateway changes and major volcanic events) in environmental change.  

Awards and Honors


Active Funding

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Dulci and Dal's toys May 12, 2008