My research explores the interaction of physical and chemical processes that shape landscapes and drive geochemical cycles. I have a particular interest in geochemistry in the cryosphere, and have worked on ice dynamics, hydrology and geochemical processes of several Alaskan glaciers. From 2007-2020 I led the Boulder Creek Critical Zone Observatory, a National Science Foundation-funded environmental observatory dedicated to interdisciplinary study of the Critical Zone, the life-sustaining interface at the Earth's surface where rock meets air and water.

Project Land Surface Change focuses on how water, sediment, and nutrients cycle through natural and managed systems. We use technological innovations in observation (e.g., drones; airborne lidar) and advances in numerical modeling of Earth surface dynamics to understand and predict land surface response to climatic and tectonic forcing.