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Volume 8, issue 10 | Copyright

Special issue: Coupled Model Intercomparison Project Phase 6 (CMIP6) Experimental...

Special issue: The Geoengineering Model Intercomparison Project (GeoMIP):...

Geosci. Model Dev., 8, 3379-3392, 2015
https://doi.org/10.5194/gmd-8-3379-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Model experiment description paper 27 Oct 2015

Model experiment description paper | 27 Oct 2015

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

B. Kravitz1, A. Robock2, S. Tilmes3, O. Boucher4, J. M. English5,6, P. J. Irvine7, A. Jones8, M. G. Lawrence7, M. MacCracken9, H. Muri10, J. C. Moore11, U. Niemeier12, S. J. Phipps13, J. Sillmann14, T. Storelvmo15, H. Wang1, and S. Watanabe16 B. Kravitz et al.
  • 1Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, USA
  • 2Department of Environmental Sciences, Rutgers University, New Brunswick, NJ, USA
  • 3National Center for Atmospheric Research, Boulder, CO, USA
  • 4Laboratoire de Météorologie Dynamique, IPSL, CNRS/UPMC, Paris, France
  • 5NOAA Earth System Research Laboratory, Boulder, CO, USA
  • 6Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USA
  • 7Institute for Advanced Sustainability Studies, Potsdam, Germany
  • 8Met Office Hadley Centre, Exeter, UK
  • 9Climate Institute, Washington, D.C., USA
  • 10Department of Geosciences, University of Oslo, Oslo, Norway
  • 11Joint Center for Global Change Studies, College of Global Change and Earth System Science, Beijing Normal University, Beijing, China
  • 12Max Planck Institute for Meteorology, Hamburg, Germany
  • 13ARC Centre of Excellence for Climate System Science and Climate Change Research Centre, University of New South Wales, Sydney, Australia
  • 14Center for International Climate and Environmental Research, Oslo, Norway
  • 15Department of Geology and Geophysics, Yale University, New Haven, CT, USA
  • 16Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan

Abstract. 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 longwave 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. 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.

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