Gregor Kiesewetter
Senior Research Scholar
Pollution Management Research Group
Energy, Climate, and Environment Program
Biography
Gregor Kiesewetter is an atmospheric physicist. He joined the Mitigation of Air pollution& Greenhouse gases (MAG) Program in November 2011 to work on the improvement of the GAINS model. In particular, Dr. Kiesewetter’s topics include the introduction of a downscaling methodology linking the different spatial scales of air pollution impacts in GAINS (regional to street-level), as well as further advancing the treatment of radiative forcing in GAINS.
Dr. Kiesewetter graduated from the University of Vienna with a degree in physics in 2006, and earned his PhD in environmental physics from the University of Bremen, Germany, in 2011. During his PhD studies, he worked in the field of atmospheric chemistry transport modeling and satellite data assimilation, identifying anthropogenic and natural contributions to changes in the ozone layer.
Before joining IIASA as a research scholar, Dr. Kiesewetter participated in the 2009 Young Scientists Summer Program (YSSP) working on long-range transport of European air pollution to the Arctic and connections to hemispheric modes of climate variability. For his study, he was awarded IIASA’s Peccei fellowship in 2010, and returned to IIASA in summer 2011.
Last update: 07 DEC 2011
Publications
Sarkar, D., Imam, F., Kumar, A., Mukherjee, A., Purohit, P. , Kiesewetter, G. , Klimont, Z. , Ghosh, S., Balakrishnan, K., Chowdhury, S., & Dey, S. (2025). Pathways for India to Reduce Ambient Air Pollution Health Burden and Achieve the Sustainable Development Goal (SDG-3.4). Environmental Science & Technology 59 (10) 4765-4777. 10.1021/acs.est.4c08697.
World Bank (2025). Accelerating Access to Clean Air for a Livable Planet. International Bank for Reconstruction and Development/The World Bank , Washington, DC.
Klimont, Z. , Kiesewetter, G. , Schöpp, W. , Gomez Sanabria, A. , Rafaj, P. , Purohit, P. , Borken-Kleefeld, J. , Wagner, F. , Heyes, C. , Höglund-Isaksson, L. , Nguyen, B. , Sander, R. , & Warnecke, L. (2025). Chapter 1: Bringing Clean Air, Better Health, A Stable Climate and Other Benefits to the ASEAN Region. In: Clean Air and Climate Solutions for ASEAN. Eds. United Nations Environment Programme, pp. 1-17 United Nations Environment Programme. ISBN 9789280742138 10.59117/20.500.11822/47268.
European Commission & Directorate-General for Environment (2025). Support to the development of the fourth clean air outlook – Final report. Publications Office of the European Union , Luxembourg. doi/10.2779/8768689.
Purohit, P. , Kiesewetter, G. , Schöpp, W. , Wagner, F. , Klimont, Z. , Heyes, C. , Gomez Sanabria, A. , Srivastava, P., Borken-Kleefeld, J. , & Amann, M. (2024). Cost-effective control of air pollution in South Asia: modeling and policy applications. Environmental Research Communications 6 (12) e125017. 10.1088/2515-7620/ad9b74.