Chris Halsted is a graduate student in the Rubenstein School of Environment and Natural Resources and a member of the NSF/UVM Cosmogenic Community Facility. While getting a BS and MS in Geology, he became interested in past and future climate change, particularly the interactions between ice sheets and the rest of the climate system. His graduate research focuses on reconstructing the collapse of former ice sheets to gain insight into long-term ice-sheet dynamics. The reconstructions are based on numerous lines of evidence, but Chris personally collects data using in-situ cosmogenic nuclide expose ages of glacially-deposited material. In-situ cosmogenic nuclides are rare isotopes formed in the solid earth during reactions between high-energy cosmic rays and terrestrial atoms, and their concentration reflects the exposure duration of the sampled surface.
In addition to his work on ice sheet reconstructions, Chris is working with Professor Paul Bierman and Dr. Lee Corbett on the refinement of cosmogenic nuclide exposure dating techniques.