IIASA researchers recognized among top scientists in Research.com’s 2025 rankings

Research.com, a platform for academic rankings, publishes annual lists of the world’s top scholars across various scientific fields. The 2025 rankings once again showcase the strength and impact of IIASA research in areas such as Earth science, ecology and evolution, engineering and technology, environmental sciences, and social sciences and humanities.

The rankings are based on an in-depth analysis of scholarly data, including citation metrics, publication volume, and academic achievements such as awards and recognition.

The following IIASA researchers and alumni were included in the 2025 ranking:

Biology and biochemistry:
Keywan Riahi, Energy, Climate, and Environment Program Director

Ecology and evolution:
Ulf Dieckmann, Principal Research Scholar in the Advancing Systems Analysis Program
Petr Havlík, Biodiversity and Natural Resources Program Director
Anatoly Shvidenko, Distinguished Emeritus Research Scholar in the Biodiversity and Natural Resources Program 
Wilfried Winiwarter, Senior Research Scholar in the Energy, Climate, and Environment Program
Piero Visconti, Research Group Leader and Senior Research Scholar in the Biodiversity and Natural Resources Program
Florian Kraxner, Research Group Leader and Principal Research Scholar in the Biodiversity and Natural Resources Program
Jinfeng Chang, Guest Research Scholar in the Biodiversity and natural Resources Program

Engineering and technology:
Linda See, Principal Research Scholar in the Advancing Systems Analysis Program

Environmental sciences:
Keywan Riahi, Energy, Climate, and Environment Program Director
Zbigniew Klimont, Research Group Leader and Principal Research Scholar in the Energy, Climate, and Environment Program
Steffen Fritz, Strategic Initiatives Program Director
Markus Amann, former IIASA Program Director
Nebojsa Nakicenovic, Distinguished Emeritus Research Scholar in the Energy, Climate, and Environment Program
Volker Krey, Research Group Leader and Principal Research Scholar in the Energy, Climate, and Environment Program
Ian McCallum, Research Group Leader and Principal Research Scholar in the Advancing Systems Analysis Program
Hugo Valin, IIASA alumnus.
Janusz Cofala, IIASA alumnus
Günther Fischer, Distinguished Emeritus Research Scholar in the Biodiversity and Natural Resources Program
Reinhard Mechler, Research Group Leader and Principal Research Scholar in the Advancing Systems Analysis Program
Simon Langan, IIASA alumnus
Arnulf Grubler, Distinguished Emeritus Research Scholar in the Energy, Climate, and Environment Program
Marijn van der Velde, IIASA alumnus
Maximillian Posch, Guest Research Scholar in the Energy, Climate and Environment Program
Fabian Wagner, Capacity Development and Academic Training Unit Dean and Principal Research Scholar in the Energy, Climate and Environment Program
Pallav Purohit, Senior Research Scholar in the Energy, Climate, and Environment Program
Christian Folberth, Senior Research Scholar in the Biodiversity and Natural Resources Program
Chris Heyes, Emeritus Research Scholar in the Energy, Climate, and Environment Program
Dmitry Schepaschenko, Principal Research Scholar in the Advancing Systems Analysis and Biodiversity and Natural Resources programs
Bas van Ruijven, Research Group Leader and Principal Research Scholar in the Energy, Climate, and Environment Program
Nikolay Khabarov, Senior Research Scholar in the Advancing Systems Analysis Program
Sten Nilsson, Guest Senior Research Scholar in the Biodiversity and Natural Resources Program
Peter Burek, Senior Research Scholar in the Biodiversity and Natural Resources Program

Social sciences and humanities:
Shonali Pachauri, Research Group Leader and Principal Research Scholar in the Energy, Climate, and Environment Program
Sabine Fuß, Guest Research Scholar in the Biodiversity and Natural Resources Program
Michael Thompson, Guest Emeritus Research Scholar in the Advancing Systems Analysis Program 
Sergei Scherbov, Distinguished Emeritus Research Scholar in the Population and Just Societies Program

IIASA congratulates all those recognized for their outstanding contributions to science.

Further information 
https://research.com/rankings