The Arctic climate is warming rapidly, and precipitation is changing, with concurrent changes to shrubs, permafrost and water. However, numerous changes in the water cycle are unexpected and unexplained by current models. The goal of Dr. Philip Marsh’s research project is to make significant advances in both the understanding of, and ability to predict, Arctic water resources at the local scale of interest to northerners. Marsh’s project will use a combination of novel field observations and experiments, remote sensing, and multiscale modeling, to provide robust scenarios of future changes. The scenarios are urgently needed to consider, and plan for, future changes in climate.