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Keller, Klaus
Klaus Keller is an associate professor of geosciences at Penn State, with an adjunct appointment as a professor of engineering and public policy at Carnegie Mellon University. At Penn State, Keller directs the center for climate risk management as well as the research network for sustainable climate risk management ( Before joining Penn State, he worked as a research scientist and lecturer at Princeton University and as an engineer in Germany. Professor Keller graduated from Princeton with a Ph.D. in civil and environmental engineering. He received master’s degrees from M.I.T. and Princeton as well as an engineer’s degree from the Technische Universität Berlin. His research addresses two interrelated questions. First, how can we mechanistically understand past and potentially predict future changes in the climate system? Second, how can we use this information to design sustainable, scientifically sound, technologically feasible, economically efficient, and ethically defensible climate risk management strategies? He analyzes these questions by mission-oriented basic research covering a wide range of disciplines such as Earth system science, economics, engineering, philosophy, decision science, and statistics.


A model for metal adsorption on montmorillonite  Journal of Colloid and Interface Science 210 (1), 43-54, 1999
On the acid-base chemistry of permanently charged minerals  Environmental science & technology 32 (19), 2829-2838, 1998
Robust climate policies under uncertainty: a comparison of robust decision making and info‐gap methods  Risk Analysis 32 (10), 1657-1672, 2012
Sources and variations of mercury in tuna  Environmental science & technology 37 (24), 5551-5558, 2003
Uncertain climate thresholds and optimal economic growth  Journal of Environmental Economics and management 48 (1), 723-741, 2004
Research Centers
Center for Climate Risk Management
The Earth and Environmental Systems Institute
Earth Systems Simulation
Energy Systems
Engineering Statistics and Machine Learning Lab
Greenhouse Gas Measurement and Modelling
Risk Analysis
Market Centers
Climate Science and Ecosystem Change
Earth and Environmental Applications
Water and Biogeochemical Cycles
Institute for Natural Gas Research