The Geoengineering Model Intercomparison Project (GeoMIP) contribution to CMIP7 – description of new experimental protocols and preliminary results
Year: 2026
Type: article
Abstract: . The Geoengineering Model Intercomparison Project (GeoMIP) is a coordinated international model intercomparison effort with the aim of providing robust experimental protocols for simulations of various Solar Radiation Modification (SRM) methods. Through many iterations and discussions within the GeoMIP community, it has become clear that balancing simplicity with scientific realism and policy relevance and associated complexities is fundamental when designing modeling experiments. Such experiments must both diagnose areas of model agreement and disagreement through the lens of climate science and provide results useful for understanding the potential downstream impacts of SRM across different sectors. Here we present a suite of new climate model experiments designed for the Coupled Model Intercomparison Project Phase 7 (CMIP7), building on lessons learned from previous GeoMIP experiments, recent SRM research, and new simulations developed for CMIP7. We provide detailed experimental designs and their underlying rationale, including preliminary results from sensitivity analyses performed with CMIP6 models. Compared to previous GeoMIP iterations, we organize experiments into three categories: i) Preparatory Experiments, designed to diagnose model responses and inform more complex experimental designs; ii) Tier 1 experiments, the core simulations that all participating models are encouraged to run; and iii) Tier 2 experiments, which provide a flexible framework for exploring structural and scenario uncertainties under SRM, including the potential interaction with temporary overshoot scenarios and tipping elements dynamics. This framework encourages modeling groups to propose their own experiments building upon the Tier 1 backbone, enabling more targeted exploration while ensuring cross-model compatibility.
Source: Geoscientific model development
Authors: Daniele Visioni, Alan Robock, Alistair Duffey, Matthew Henry, Haruki Hirasawa, Walker R. Lee, Cindy Wang, Kelsey Roberts, Shingo Watanabe, Michelle S. Reboita, Masahiro Sugiyama, Ben Kravitz, Jim Haywood, Simone Tilmes, Frederic Bonou, Jack Chen, Timofei Sukodolov, Sandro Vattioni, Andrin Jörimann, Diego Villanueva, Ryan Vella, Paul Farron, Ewa M. Bednarz, Ulrike Niemeier, Colleen Golja, Juan A. Anel
Institutions: Cornell University, Rutgers, The State University of New Jersey, University of Exeter, University of Washington, NSF National Center for Atmospheric Research, NSF NCAR Climate and Global Dynamics Laboratory, Japan Agency for Marine-Earth Science and Technology, Tohoku University, Universidade Federal de Itajubá, The University of Tokyo, Indiana University Bloomington, Indiana University, NSF NCAR Atmospheric Chemistry Observations & Modeling, Physikalisch-Meteorologisches Observatorium Davos, ETH Zurich, Institute for Atmospheric and Climate Science, Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, NOAA Chemical Sciences Laboratory, Max Planck Institute for Meteorology, Imperial College London, Universidade de Vigo
Language: English
Subfield: Global and Planetary Change
Field: Environmental Science
Domain: Physical Sciences
SDG: Climate action
Open Access status: gold
Estimated APC paid: $1,725
Funders: National Science Foundation, Ministry of Education, Culture, Sports, Science and Technology, National Oceanic and Atmospheric Administration, Japan Society for the Promotion of Science, Japan Agency for Marine-Earth Science and Technology, Agencia Estatal de Investigación, Climate Program Office, NOAA Research, Development of Advanced Measurement and Analysis Systems
Awards: G1175115578, Capacity for environmental innovation policy: Cases of emerging climate change options, G1846624781, G2262748287, G300979063, G34297780, G3480869486, G361658898, G3822150226, G425668148, G5080475149, G5329086132, G5338730000, Stratospheric Aerosol Climate Intervention Designed to Minimize Negative Impacts, G5738699004, G6308392790, G7084143925, G7198630863, 古代説話における諸寺縁起の研究, G7859210927, G7970554450, G8075848104
OpenAlex ID: W7212240211