The PhD program offers highly qualified students the opportunity to work on environmental research using an interdisciplinary approach to complex issues.<br>The program is flexible, and designed to meet the needs of the student. The PhD program provides students the opportunity to work on multi-disciplinary projects, using cutting edge techniques, with access to the latest technologies and laboratory facilties at Discovery Park and across the Purdue campus.<br><br>Observe the dynamics of earth systems interactions through climate, hydrologic, and land use systems study at landscape to global scales. Earth systems research often requires the use of spatially explicit data and capabilities such as remote sensing from space-based, airborne, or UAV platforms and geographic information systems combined with modeling in ways that address policy at relevant scales. Study of the earth system may involve historical analysis and forecasts of earth system interactions across years, decades or millennia via simulation models which may need to be implemented on supercomputers.