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Hello! My name is Bryn Stewart, and I am a hydro-biogeochemist interested in studying how streams and rivers respond to disturbances, from storms and droughts to long-term changes in land cover and climate. I am particularly interested in extreme climate events and cross-scale studies that improve our understanding of hydrological and biogeochemical processes that drive stream chemistry behavior across different landscapes.

I use a variety of tools in my research, including process-based reactive transport modeling, data analysis, field observations, and small-scale laboratory experiments.

I received my PhD in Environmental Engineering and Biogeochemistry and BSc in Chemical Engineering from Penn State University. After finishing my PhD, I spent two years at the California Institute of Technology (Caltech) as the Foster and Coco Stanback Postdoctoral Fellow in the Division of Geological and Planetary Sciences.

I joined the Department of Hydrology and Atmospheric Sciences at the University of Arizona in January 2026 as an Assistant Professor. Please reach out if you are interested in working together!