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
Received: 07 May 2015 – Published in Geosci. Model Dev. Discuss.: 22 Jun 2015
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.
Revised: 01 Oct 2015 – Accepted: 14 Oct 2015 – Published: 27 Oct 2015
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Kravitz, B., Robock, A., Tilmes, S., Boucher, O., English, J. M., Irvine, P. J., Jones, A., Lawrence, M. G., MacCracken, M., Muri, H., Moore, J. C., Niemeier, U., Phipps, S. J., Sillmann, J., Storelvmo, T., Wang, H., and Watanabe, S.: The Geoengineering Model Intercomparison Project Phase 6 (GeoMIP6): simulation design and preliminary results, Geosci. Model Dev., 8, 3379-3392, doi:10.5194/gmd-8-3379-2015, 2015.