Volker Krey
Research Group Leader and Principal Research Scholar
Sustainable Service Systems Research Group
Energy, Climate, and Environment Program
Research Group Leader and Principal Research Scholar
Integrated Assessment and Climate Change Research Group
Energy, Climate, and Environment Program
Biography
Volker Krey leads the Integrated Assessment and Climate Change Research Group of the IIASA Energy, Climate, and Environment Program.
His main fields of scientific interest include the integrated assessment of climate change and the link to a broader suite of sustainable development objectives such as improved air quality, sustainable water use, and energy access, as well as the interaction with material cycles via circular economy strategies. His work focuses on the development and application of integrated assessment models (IAMs) with different regional focuses (subnational to global scale) and time horizons. Over the past decade, he has been overseeing the development of the MESSAGEix model at IIASA and its recent release as an open source tool. As a co-chair of the scientific working group on data protocols and management of the Integrated Assessment Modeling Consortium (IAMC), he has significantly contributed to improving transparency and data sharing in the IAM community.
Krey has served as a Lead Author of multiple IPCC Reports, including the 5th and 6th Assessment Reports of Working Group III, and the Special Report on Renewable Energy Sources and Climate Change Mitigation. He has coauthored more than 120 publications that have been cited well over 20,000 times in total. From 2018 to 2024 he has been acknowledged as a Highly Cited Researcher by Clarivate in their annual rankings.
Last update: 19 NOV 2025
Publications
Fujimori, S. , Rogelj, J. , Krey, V. , & Riahi, K. (2019). A new generation of emissions scenarios should cover blind spots in the carbon budget space. Nature Climate Change 9 (11) 798-800. 10.1038/s41558-019-0611-9.
Wada, Y. , Vinca, A. , Parkinson, S. , Willaarts, B. , Magnuszewski, P., Mochizuki, J. , Mayor, B., Wang, Y., Burek, P. , Byers, E. , Riahi, K. , Krey, V. , Langan, S. , van Dijk, M. , Grey, D., Hillers, A., Novak, R., Mukherjee, A., Bhattacharya, A., Bhardwaj, S., Romshoo, S., Thambi, S., Muhammad, A., Ilyas, A., Khan, A., Lashari, B., Mahar, R., Ghulam, R., Siddiqi, A., Wescoat, J., Yogeswara, N., Ashrad, A., & Sidhu, B. (2019). Co-designing Indus Water-Energy-Land Futures. One Earth 10.1016/j.oneear.2019.10.006.
Rogelj, J. , Huppmann, D. , Krey, V. , Riahi, K. , Clarke, L., Gidden, M. , Nicholls, Z., & Meinshausen, Malte (2019). A new scenario logic for the Paris Agreement long-term temperature goal. Nature 573 (7774) 357-363. 10.1038/s41586-019-1541-4.
Vinca, A. , Parkinson, S. , Byers, E. , Burek, P. , Khan, Z., Krey, V. , Diuana, F., Wang, Y., Ilyas, A., Köberle, A.C., Staffel, I., Pfenninger, S., Muhammad, A., Rowe, A., Schaeffer, R., Rao, N. , Wada, Y. , Dhilali, N., & Riahi, K. (2019). The Nexus Solutions Tool (NEST): An open platform for optimizing multi-scale energy-water-land system transformations. Geoscientific Model Development Discussions 13 (3) 1095-1121. 10.5194/gmd-2019-134.
Rogelj, J. , Huppmann, D. , Krey, V. , Riahi, K. , Clarke, L., Gidden, M. , Nicholls, Z., & Meinshausen, M. (2019). Scenario data for "A new scenario logic for the Paris Agreement long-term temperature goal". 10.22022/ENE/06-2019.48.