My research interests focus on the terrestrial water cycle, and especially human impacts on the water cycle, at spatial scales of river basins to regional and continental scales. On the observational side, I use multiple satellite remote sensing and in situ datasets to quantify the components of the water balance.
Of particular importance to my research has been data from the Gravity Recovery and Climate Experiment (GRACE). It can be argued that GRACE is the most interdisciplinary satellite mission launched to date. GRACE has been used to study surface processes involving hydrologic, oceanic, and cryospheric water mass redistribution. This website uses software that I developed to perform real-time data analysis of GRACE data. Data from this site has been downloaded by hundreds of users from around the globe.