Chris ReinhardAssistant Professor of Biogeochemistry
School of Earth & Atmospheric Sciences Georgia Institute of Technology Google Scholar GitHub CV My past and current research is probably best characterized as falling under the labels of Earth system evolution, geobiology, and astrobiology. In practice, this involves combining techniques and theory from geology, oceanography, biogeochemistry, and planetary science in an effort to understand how Earth surface environments have changed through time, how this evolution has been coupled with the evolution of the biosphere, and how this knowledge can be generalized for application to other planetary environments. Devon Cole
Research Scientist II
School of Earth & Atmospheric Sciences Georgia Institute of Technology | website | Devon works at the intersection of field geology, tracer application, and biogeochemical modeling with the goal of reconstructing the evolution of Earth's oxygen cycle and understanding the factors that control the scope of biospheres on habitable Earth-like planets. Her current work at Georgia Tech involves ocean model inversions of global productivity in Earth's deep past, tracking the links between Earth's evolving oxygen cycle and major events in biological evolution, and modeling the biogeochemical leverage of photosynthesis around dim stars. Eddie SchwietermanPostdoctoral Researcher
School of Earth & Atmospheric Sciences Georgia Institute of Technology | website | Eddie is an observational astronomer by training, and is deeply interested in the development and application of atmospheric biosignatures on planets outside our solar system. His current work focuses on techniques for mitigating "false negatives" for oxygen- and methane-based atmospheric biosignatures, using a novel combination of biogeochemical models, atmospheric photochemical models, and radiative transfer code. His research is funded by NASA's Nexus for Exoplanet System Science [NExSS]. Nadia SzeinbaumNASA Postdoctoral Program Fellow [co-advised with Dr. Jennifer Glass]
School of Earth & Atmospheric Sciences Georgia Institute of Technology | website | Nadia is broadly interested in the microbial ecophysiology of anaerobic carbon and manganese cycling in both modern and ancient environments, with diverse applications spanning biotechnology, the elucidation of modern microbial diversity, understanding planetary evolution, and searching for life beyond Earth. Under the auspices of a NASA Postdoctoral Program Fellowship, Nadia is currently focused on the role of microbial interaction in the oxygenation of Earth's ocean-atmosphere system. Zijian LiPhD student
School of Earth & Atmospheric Sciences Georgia Institute of Technology Zijian is working on a series of projects aimed at refining our understanding of ocean redox evolution on Earth. He has a particular interest in isotopic tracers linked to the cycling of manganese (Mn) in the ocean, in particular the stable thallium (Tl) and molybdenum (Mo) isotope tracers. His work includes constraining ocean oxygenation during the Paleoproterozoic, understanding the effects of burial alteration on Tl isotope signatures in sedimentary rocks, and reaction-transport modeling of trace element cycling in marine sediments. Pengxiao XuPhD student
School of Earth & Atmospheric Sciences Georgia Institute of Technology Pengxiao is using thermodynamic models to explore the role of hydrothermal systems in controlling oxygen and nutrient cycling on ocean worlds, and is interested in refining stable chromium (Cr) isotopes and cerium (Ce) systematics as proxies for ocean-atmosphere oxygenation through Earth's history. |
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lab alumni:
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Xinyi [Camilla] Liu
PURA Undergraduate Researcher Project: 3-D modeling of ocean oxygen and nutrient cycles Currently a Ph.D. student in the Department of Geophysical Sciences at the University of Chicago | website | Dragos [George] Zaharescu
Postdoctoral Researcher Project: Mesocosm experiments of weathering under anoxic environments Currently a lecturer at University of Wisconsin, Green Bay | website | Luis Cortés
Rutt Bridges Undergraduate Scholar Project: Trace element proxies of mantle redox on Earth through time Currently a Field Engineer for Schlumberger | website | Ashley Brady
MS Student Project: Cr isotope effects during precipitation of carbonate mineral phases Currently STEM Resident at the Gwinnett School of Mathematics, Science, and Technology (GSMST) | website | Kazumi Ozaki
NASA Postdoctoral Program Fellow Project: Modeling the effects of different forms of photosynthesis on the stability of planetary climate and the redox state of Earth's early atmosphere. Now a faculty member at Toho University | website | Chloe Stanton
Rutt Bridges Undergraduate Scholar (co-advised with Dr. Jennifer Glass) Project: Reconstructing the Proterozoic nitrous oxide cycle by combining experimental kinetics and atmospheric photochemistry. Currently a Ph.D. student in the Department of Geosciences at Penn State | website | Kyle Rybacki
Postdoctoral Researcher Project: Stable chromium (Cr) and thallium (Tl) isotopes in Pleistocene carbonate sediments and Archean sedimentary rocks as tracers of ocean-atmosphere oxygen levels. Now at the Bureau of Land Management, Carlsbad, NM | website | Rich Gaschnig
Postdoctoral Researcher Project: Mo and U isotopes in igneous rocks as tracers of deep sea redox and mantle recycling Now on the faculty at University of Massachusetts, Lowell | website | Josh Stanford
MS Student Project: Using Mo isotopes to fingerprint Paleoproterozoic oxygen oases Currently an Environmental Specialist for the Southern California Gas Company | website | |