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Title: The Geoengineering Model Intercomparison Project Phase 6 (GeoMIP6): Simulation design and preliminary results

We present a suite of new climate model experiment designs for the Geoengineering Model Intercomparison Project (GeoMIP). This set of experiments, named GeoMIP6 (to be consistent with the Coupled Model Intercomparison Project Phase 6), builds on the previous GeoMIP project simulations, and has been expanded to address several further important topics, including key uncertainties in extreme events, the use of geoengineering as part of a portfolio of responses to climate change, and the relatively new idea of cirrus cloud thinning to allow more long wave radiation to escape to space. We discuss experiment designs, as well as the rationale for those designs, showing preliminary results from individual models when available. We also introduce a new feature, called the GeoMIP Testbed, which provides a platform for simulations that will be performed with a few models and subsequently assessed to determine whether the proposed experiment designs will be adopted as core (Tier 1) GeoMIP experiments. In conclusion, this is meant to encourage various stakeholders to propose new targeted experiments that address their key open science questions, with the goal of making GeoMIP more relevant to a broader set of communities.
ORCiD logo [1] ; ORCiD logo [2] ;  [3] ;  [4] ; ORCiD logo [5] ;  [6] ;  [7] ;  [6] ;  [8] ; ORCiD logo [9] ;  [10] ;  [11] ; ORCiD logo [12] ;  [13] ;  [14] ;  [1] ;  [15]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Rutgers Univ., New Brunswick, NJ (United States)
  3. National Center for Atmospheric Research, Boulder, CO (United States)
  4. Laboratoire de Meteorologie Dynamique, Paris (France)
  5. NOAA Earth System Research Lab. and Univ. of Colorado, Boulder, CO (United States)
  6. Inst. of Advanced Sustainability Studies, Potsdam (Germany)
  7. Met Office Hadley Centre, Exeter (United Kingdom)
  8. Climate Inst., Washington, DC (United States)
  9. Univ. of Oslo (Norway)
  10. Beijing Normal Univ., Beijing (China)
  11. Max Planck Inst. for Meterology, Hamburg (Germany)
  12. Univ. of New South Wales, Sydney, NSW (Australia)
  13. Center for International Climate and Environmental Research, Oslo (Norway)
  14. Yale Univ., New Haven, CT (United States)
  15. Japan Agency for Marine-Earth Science and Technology, Yokohama (Japan)
Publication Date:
Report Number(s):
Journal ID: ISSN 1991-9603; 400403809
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Geoscientific Model Development (Online)
Additional Journal Information:
Journal Name: Geoscientific Model Development (Online); Journal Volume: 8; Journal Issue: 10; Journal ID: ISSN 1991-9603
European Geosciences Union
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
Country of Publication:
United States
OSTI Identifier: