Title: Staying Green at the Extreme - Exploring Energy Challenges and Tradeoffs for Science Workflows at Extreme Scales Abstract: As scientific applications target extreme scales, energy-related challenges are becoming dominating concerns. As a result, it is critical to explore emerging architectures (e.g., with multiple cores and deep memory hierarchies) and applications (e.g., coupled simulation workflows) from an energy perspective and investigate associated overheads and tradeoffs. For example, energy/power-efficiency have to be addressed in combination with quality of solution, performance and reliability, and other objectives, and achieving the desired levels of reduction in power consumptions requires a comprehensive cross-layer and application-aware strategy. In this talk I will explore these issues and will describe recent related research efforts at the Rutgers Discovery Informatics Institute (RDI2).