I study the interactions of tectonic, climatic, and erosional processes by examining their effects and dependencies on topography, particularly in active mountain belts such as the Himalayas and Andes. This work uses GIS, remote sensing, and numerical modeling methods to integrate and synthesize geologic, geophysical, climatic, hydrologic, and modeling data spanning a wide range of spatial and temporal scales. When pressed for a concise label, I've sometimes gone for "digital geomorphologist".