My research is focused on the interactions and feedbacks between the cryosphere and the climate system. This work is motivated by societal need to understand the climate system, project sea level rise, and manage water resources. I employ methods of computer modeling, data analysis, and field instrumentation. My field research is conducted on the Greenland Ice Sheet, small glaciers in Alaska and Montana, and seasonal snow in Montana. My research is funded by the U.S. National Science Foundation, NASA, and the Swedish Nuclear Waste Management Company.