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