Articles | Volume 19, issue 17
https://doi.org/10.5194/gmd-19-8469-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/gmd-19-8469-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Model experiment description paper
| Highlight paper
| 
11 Sep 2026
Model experiment description paper | Highlight paper |
| 11 Sep 2026
| 11 Sep 2026
The Geoengineering Model Intercomparison Project (GeoMIP) contribution to CMIP7 – description of new experimental protocols and preliminary results
Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY 14850, USA
Alan Robock
Department of Environmental Sciences, Rutgers University, New Brunswick, NJ, USA
Alistair Duffey
Reflective, San Francisco, CA, USA
Matthew Henry
Department of Mathematics and Statistics, University of Exeter, Exeter, UK
Haruki Hirasawa
Department of Atmospheric and Climate Sciences, University of Washington, Seattle, WA 98105, USA
Walker Raymond Lee
Climate & Global Dynamics Laboratory, NSF National Center for Atmospheric Research, Boulder, CO 80305, USA
Cindy Wang
Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY 14850, USA
Kelsey Roberts
Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY 14850, USA
Shingo Watanabe
Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Kanagawa, Japan
Advanced Institute for Marine Ecosystem Change (WPI-AIMEC), Tohoku University, Sendai, Japan
Michelle Simões Reboita
Instituto de Recursos Naturais, Universidade Federal de Itajubá, Itajubá, Brazil
Masahiro Sugiyama
University of Tokyo, Tokyo, Japan
Ben Kravitz
Department of Earth and Atmospheric Sciences, Indiana University, Bloomington, IN, USA
Jim Haywood
Department of Mathematics and Statistics, University of Exeter, Exeter, UK
Simone Tilmes
National Science Foundation – National Center for Atmospheric Research (NSF-NCAR), Atmospheric Chemistry Observations & Modeling (ACOM), Boulder, CO, USA
Frédéric K. Bonou
Institut de Recherches Halieutiques et Océanologiques du Bénin (IRHOB), Cotonou, Benin
Jack Chen
Climate & Global Dynamics Laboratory, NSF National Center for Atmospheric Research, Boulder, CO 80305, USA
Timofei Sukhodolov
Physikalisch Meteorologisches Observatorium Davos/World Radiation Center, Davos, Switzerland
Sandro Vattioni
Physikalisch Meteorologisches Observatorium Davos/World Radiation Center, Davos, Switzerland
Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
Andrin Jörimann
Physikalisch Meteorologisches Observatorium Davos/World Radiation Center, Davos, Switzerland
Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
Diego Villanueva
Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
Ryan Vella
Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
Paul Farron
Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
Ewa Bednarz
Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado at Boulder, Boulder, CO, USA
NOAA Chemical Sciences Laboratory (NOAA CSL), Boulder, CO, USA
Ulrike Niemeier
Max Planck Institute for Meteorology, Hamburg, Germany
Colleen Golja
Department of Physics, Imperial College London, London, UK
Juan A. Añel
EPhysLab, CIM-UVigo, Universidade de Vigo, Ourense, Spain
Data sets
Data for Figures 2 and 4 Alistair Duffey https://doi.org/10.5281/zenodo.19556593
ARISE data Yaga Richter https://gdex.ucar.edu/datasets/d651059/
Data for Figure 3 Walker Lee et al. https://doi.org/10.5281/zenodo.17613419
Data for Figure 5 Haruki Hirasawa et al. https://doi.org/10.5281/zenodo.19582532
Data for MCT figures Diego Villanueva et al. https://doi.org/10.5281/zenodo.19665403
Model code and software
Code for Figures 2 and 4 Alistair Duffey and Cindy Wang https://doi.org/10.5281/zenodo.19582298
Editorial statement
Interest in solar radiation modification (SRM) has grown substantially over the past decade, alongside strong concerns about its potential ecological impacts and the ethical and governance challenges associated with both research and possible deployment. These uncertainties make rigorous, transparent, and coordinated research essential, not to advocate deployment, but to identify and assess its risks, limitations, and potential consequences. In the context of CMIP7 and the forthcoming IPCC AR7, this manuscript represents a major step toward providing the scientific community with robust and comparable evidence on possible SRM outcomes. It will therefore help ensure that future climate assessments and policy discussions are informed by systematic analysis rather than by unresolved assumptions.
Interest in solar radiation modification (SRM) has grown substantially over the past decade,...
Short summary
The Geoengineering Model Intercomparison Project is a coordinated international model intercomparison effort aiming to provide robust experimental protocols for simulations of various Solar Radiation Modification (SRM) methods. In this manuscript, we describe a list of novel experiments decided by the community, to be run by climate models to better understand sources of uncertainty in SRM. We also show and discuss some preliminary results from a few climate models.
The Geoengineering Model Intercomparison Project is a coordinated international model...
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