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Colorado State University
Department of Geosciences
Paleoclimate And earth System Theory Group
We use the geologic past to understand why climate on Earth changes and what the consequences are for terrestrial landscapes and ecosystems
Masters and PhD Student Opportunities
We are always looking for students interested in studying past climate, the geological carbon-cycle, or interactions between weathering, erosion, and climate. If that's you, contact Jeremy. If you'd like more information about the graduate program in the Department of Geosciences at CSU, click here.
Check out the new PATCH Lab online database
The Paleo Analysis of Terrestrial Climate and Hydrology (PATCH) Laboratory is now online! This database curates more than 27,000 stable isotope measurements from Cenozoic terrestrial sediments in the northern Hemisphere. The laboratory also includes several simple models to aid in data interpretation.
See the accompanying paper in American Journal of Science.
Recent Publication Figures!
A reconstruction of terrestrial δ18O and δ13C in northern New Mexico across the Miocene Climate Optimum. Shown are correlations with the benthic δ18O stack as well as atmospheric CO2 and estimates of soil respiration rates. Note the positive correlation between δ18O and δ13C as well as the negative correlation between benthic δ18O and terrestrial δ18O. (from Spaur et al. 2025).
Stream water δ18O (a) and d-excess (b) from across the Pamir range in eastern Tajikistan/western China. The decrease and then increase in δ18O and d-excess as one moves east across the Pamir results from a dramatic change in precipitation seasonality, modulated by orographic interactions with the mid-latitude jet (from Chen et al. 2025).
GeoPAST Group
GeoPAST Group
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