Overview CMIP6‐Endorsed MIPs See updates http://www.wcrp‐climate.org/index.php/wgcm‐cmip/about‐cmip Date: 19 August 2015 Based on the assessment of the 10 CMIP6 endorsement criteria that were agreed at the WGCM 18th Session in October 2014, the CMIP Panel and WGCM co-chairs have now endorsed 21 Model Intercomparison Projects (MIPs). The CMIP6 design will be described in a Geoscientific Model Development special issue with submissions of an overview paper and the CMIP6-Endorsed MIP contributions envisaged by end of March 2016. The description of the experiments and forcing data sets presented in this special issue will define CMIP6 in detail. Updated information on CMIP6 can also be found at the CMIP Panel website at http://www.wcrp-climate.org/index.php/wgcm-cmip/about-cmip. Table 1. Overview of the 21 CMIP6‐Endorsed MIPs endorsed by mid‐August 2015. MIPs marked with * are “Diagnostic MIPS”. Short name of MIP Long name of MIP 1 AerChemMIP Aerosols and Chemistry Model Intercomparison Project 2 C4MIP Coupled Climate Carbon Cycle Model Intercomparison Project 3 CFMIP Cloud Feedback Model Intercomparison Project 4 DAMIP Detection and Attribution Model Intercomparison Project 5 DCPP Decadal Climate Prediction Project 6 FAFMIP Flux‐Anomaly‐Forced Model Intercomparison Project 7 GeoMIP Geoengineering Model Intercomparison Project 8 GMMIP Global Monsoons Model Intercomparison Project 9 HighResMIP High Resolution Model Intercomparison Project 10 ISMIP6 Ice Sheet Model Intercomparison Project for CMIP6 11 LS3MIP Land Surface, Snow and Soil Moisture 12 LUMIP Land‐Use Model Intercomparison Project 13 OMIP Ocean Model Intercomparison Project 14 PMIP Palaeoclimate Modelling Intercomparison Project 15 RFMIP Radiative Forcing Model Intercomparison Project 16 ScenarioMIP Scenario Model Intercomparison Project 17 VolMIP Volcanic Forcings Model Intercomparison Project 18 CORDEX* Coordinated Regional Climate Downscaling Experiment 19 DynVar* Dynamics and Variability of the Stratosphere‐Troposphere System 20 SIMIP* Sea‐Ice Model Intercomparison Project 21 VIACS AB* VIACS Advisory Board for CMIP6 Application for CMIP6-Endorsed MIPs Please return to CMIP Panel Chair Veronika Eyring (email: [email protected]) Date: 10 November 2014 The recently proposed, revised CMIP structure (see information on the CMIP Panel website at http://www.wcrp-climate.org/index.php/wgcm-cmip/about-cmip) provides for a small set of experiments to be routinely performed by modeling groups whenever they develop a new model version. The output from these so-called ongoing CMIP Diagnostic, Evaluation and Characterization of Klima (DECK) experiments and the CMIP6 Historical Simulation will be distributed for community use via the ESGF infrastructure. Other Model Intercomparison Projects (MIPs) will build on the CMIP DECK experiments and the CMIP6 Historical Simulation and augment them to address a broad range of scientific questions. Additionally proposed MIP experiments together with the CMIP DECK experiments and the CMIP6 Historical Simulation will constitute the suite of simulations for the next phase of CMIP. MIPs are invited to request endorsement for the next phase of CMIP (i.e., CMIP6). Applications from MIPs requesting status as a CMIP6-Endorsed MIP should be sent to the CMIP Panel Chair. The current set of MIP proposals is now complete and will be revised on the agreed timeline. We will review any additional proposals in a year from now at the next WGCM meeting in October 2015. A MIP may propose that a subset or even all of their experiments be included as part of the suite of simulations constituting CMIP6. The CMIP Panel will, together with the WGCM co-chairs, decide whether a MIP and its experiments meet the criteria for endorsement for CMIP6. Note that it is expected that all additional experiments proposed for CMIP6 will be scientifically analyzed and exploited by the MIP. CMIP6-Endsored MIPs can make full use of the ESGF infrastructure. In order to minimize the burden imposed on modeling groups wishing to participate, the MIPs seeking to be part of CMIP Phase X must agree to comply with the CMIP standards in terms of experimental design, data format and documentation. In general the WGCM encourages adhering to the standards in place for CMIP. The main criteria for MIPs to be endorsed for CMIP6 are 1. The MIP and its experiments address at least one of the key science questions of CMIP6. 2. The MIP demonstrates connectivity to the DECK experiments and the CMIP6 Historical Simulation. 3. The MIP adopts the CMIP modeling infrastructure standards and conventions. 4. All experiments are tiered, well-defined, and useful in a multi-model context and don’t overlap with other CMIP6 experiments. 5. Unless a Tier 1 experiment differs only slightly from another well-established experiment, it must already have been performed by more than one modeling group. 6. A sufficient number of modelling centers (~8) are committed to performing all of the MIP‘s Tier 1 experiments and providing all the requested diagnostics needed to answer at least one of its science questions. 7. The MIP presents an analysis plan describing how it will use all proposed experiments, any relevant observations, and specially requested model output to evaluate the models and address its science questions. 8. The MIP has completed the MIP template questionnaire. 9. The MIP contributes a paper on its experimental design to the CMIP6 Special Issue. 10. The MIP considers reporting on the results by co-authoring a paper with the modelling groups. AerChemMIP (Aerosols and Chemistry MIP) Application for CMIP6-Endorsed MIPs Date: 10 June 2015 Co-chairs of MIP William Collins (UK) ([email protected]) Jean‐François Lamarque (US) ([email protected]) Michael Schulz (Norway) ([email protected]) Members of the Scientific Steering Committee Olivier Boucher (France) ([email protected]) Veronika Eyring (Germany) ([email protected]) Arlene Fiore (US) ([email protected]) Michaela Hegglin (UK) ([email protected]) Gunnar Myhre (Norway) ([email protected]) Michael Prather (US) ([email protected]) Drew Shindell (US) ([email protected]) Steve Smith (US) ([email protected]) Darryn Waugh (US) ([email protected]) Goal of the MIP Past climate change has been forced by a wide range of chemically reactive gases, aerosols, and well mixed greenhouse gases (WMGHGs), in addition to CO2. Scientific questions and uncertainties regarding chemistry‐climate interactions range from regional scales (e.g., tropospheric ozone and aerosols interacting with regional meteorology), to long‐range connections (e.g., hemispheric transport of air pollution, the impacts of lower stratospheric ozone and temperatures on surface climate), to global integration (e.g., the lifetimes of CH4 and N2O). AerChemMIP proposes to contribute to CMIP6 through the following: 1) diagnose forcings 1 and feedbacks involving NTCF s, (namely tropospheric aerosols, tropospheric O3 precursors, and CH4) and the chemically reactive WMGHGs (e.g., N2O, also CH4, and some halocarbons** including impacts on stratospheric O3), 2) document and understand past and future changes in the chemical composition of the atmosphere, and 3) estimate the global‐to‐regional climate response from these changes. 1 Near Term Climate Forcers To participate in the CMIP6/AerChemMIP project models will need to be run for the CMIP6 DECK experiments with the same setup, i.e. with the same levels of sophistication activated in the chemistry and aerosol schemes. In particular it will be essential to have PI control and Historical simulations with the full chemistry (where used) and aerosols. It is also realised that valuable contributions to answering the AerChemMIP scientific questions can be made by groups unable to participate in CMIP6. Participation from these groups is welcomed and encouraged in the wider AerChemMIP project but the data will not form part of the official CMIP6 submission. Recently, WCRP endorsed “Biogeochemical forcings and feedbacks” as a Theme of Collaboration, similar in scope to the Grand Challenges. AerChemMIP is ideally suited to provide significant contributions to this theme through simulations in all Tiers. In particular, simulations Tier 1.3 look at the role of methane changes (which have an important biogeochemical component) on the historical climate. In addition, air quality is a theme central to AerChemMIP (see Tier 1.2 for example), and therefore will fulfill some of the goals of “Biogeochemical forcings and feedbacks” highlighted in http://www.wcrp‐ climate.org/images/documents/jsc/JSC36/WCRP‐GC‐biogeochemistry.pdf. The AerChemMIP Tier 1 simulations focus primarily on understanding atmospheric composition changes (from NTCFs and other chemically‐active anthropogenic gases) and their impact on climate. We have devised a series of experiments that contrast the forcing of various NTCFs with that of WMGHGs in historical and future climate change. In addition, the proposed chemistry‐climate simulations will enable diagnosis of changes in regional air quality (AQ) through its coupling to large‐scale changes in O3‐CH4‐PM2.5. We will work in collaboration with RFMIP and DAMIP to provide a comprehensive analysis of ERF and the regionally‐resolved climate forcing signature from tropospheric NTCFs. For some of the specifically attributable climate forcings, in particular those at the 10s of mW m‐2 level, the actual climate change will be difficult to detect in a transient simulation or even a time slice of several decades.