I study interactions between climate, erosion and tectonics with a focus on orographic precipitation and landscape evolution. Active areas of research include: 1) measurement and modeling of climatological precipitation patterns at scales from 1km – 100km, 2) characterization of erosion rates in areas of spatially variable precipitation, and, 3) numerical landscape evolution modeling. Field areas include the Olympic Mountains of Washington State, the Western Ghats of India, the Swiss Alps, and the Colorado Plateau