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An explanation of all the MIPs that have been validated for CMIP6 can be found in ftp://publicftp.ic3.cat/people/mmenegoz/CMIP6/ApplicationSummary_CMIP6-EndorsedMIPs_141203_Sent.pdf. A more updated version, with all the endorsed MIPs, can be found here.
The experiments that will be done by CFUers are described in the following section. There are five sets of CMIP6 experiments. All the CFUers are encouraged to indicate what role they will play in the selected MIPs, especially in the context of the projects they are involved in.
The DECK which will serve as an entry card for CMIP will consist of the following four simulations:
In addition, the CMIP6 Historical Simulation has been added which will serve as the entry card for CMIP6 and as a benchmark for CMIP6-Endorsed MIPs. The historical simulation (1850-2014) will use the specific forcings consistent with CMIP6 which will be finalized on the timescales laid out in slide 10. The CMIP6 Historical Simulation has been introduced in addition to the DECK to better separate CMIP from a specific Phase of CMIP (see slide 4 for illustration and slide 5 for the main criteria for DECK and Historical Phase X). Both DECK and the CMIP6 Historical Simulation should be run for each model configuration used in the subsequent CMIP6-Endorsed MIPs. Future climate change scenarios will be run as part of ScenarioMIP with a Tier 1 that includes three different scenarios, spanning different possible futures.
Further details can be found in the following presentation: http://www.wcrp-climate.org/images/modelling/WGCM/CMIP/CMIP6FinalDesign_WGCMMeeting_150116_Sent.pdf
Details of the DCPP experiments can be found in ftp://publicftp.ic3.cat/people/mmenegoz/CMIP6/DCPP_Components_30Mar15.pdf. DCPP is divided into 3 components:
Under DCPP, Martin Ménégoz will perform parts of C3, the experiments that focus on the volcanic effect on decadal prediction. These experiments are very close to experiments performed in the context of SPECS and are coordinated with VolMIP. They consist in repeating the decadal hindcasts without the volcanic forcing of large eruptions.
Local contact: F.J. Doblas-Reyes
The aim and the design of the experiments planned for VolMIP can be found in http://volmip.org/. All the information describing the three sets of experiments (Tier 1-2-3) planned in VolMIP are detailed on this website (see the document mentioned in the introduction for more details). The Climate Prediction Group will not be able to perform all the experiments planned and a selection has been done. From the Tier 1, Martin Ménégoz will perform the experiments “VolShort20EQfull” and “VolShort20EQini”, which consist in 25-member simulations, one with preindustrial conditions, and the other as a forecast simulating a Pinatubo eruption in 2015. Depending on the future projects in the group, it could be interesting to perform more experiments, in particular to try to complete the Tier1 of VolMIP, that consists in a high number of simulations, especially when considering that some experiments from Tier2 have been moved to Tier1 in June 2015.
Local contact: M. Ménégoz
HighResMIP will coordinate the efforts in the high-resolution modelling community. Joint analysis, based on process-based assessment and seeking to attribute model performance to emerging physical climate processes (without the complications of Earth System feedbacks) and sensitivity of model physics to model resolution, will further highlight the impact of enhanced resolution on the simulated climate.
The protocol and various other document are available from the HiResMIP wiki.
Some initial ideas on how to generate an SST and sea-ice forcing set for the AMIP-style runs (including the future part to 2050 and beyond) has been posted to the wiki.
Local contact: V. Guemas
The priority of ScenarioMIP is to address two (out of the three) CMIP6 science questions: 'How does the Earth System respond to forcing?', and 'How can we assess future climate changes given climate variability, predictability and uncertainties in scenarios?'; but not 'What are the origins and consequences of systematic model biases?'.
The ScenarioMIP experiments aim at contributing to the WCRP grand challenges by addressing the following question: How will plausible future forcing pathways affect climate extremes, global and regional climate information, regional sea level rise, water availability, and biospheric feedbacks, and how will these effects influence mitigation and adaptation possibilities?.
Two types of 21st-century (21C) scenarios have been included in the ScenarioMIP design:
The experimental design consists of six 21C scenarios grouped into two tiers by priority (see below), with only one member per scenario requested from each model. In addition, within Tier 2, other experiments are proposed: (i) an overshoot scenario in which a peak in radiative forcing occurs in the 21C, (ii) additional ensemble members for one of the 21C scenarios, (iii) three long-term extensions to 2300.
The final ScenarioMIP proposal for CMIP6 endorsement can be found in the following document: http://www.wcrp-climate.org/images/modelling/WGCM/CMIP/ApplicationSummary_CMIP6-EndorsedMIPs_150408_Sent.pdf
The overview and updates of ScenarioMIP can be found in its website: https://www2.cgd.ucar.edu/research/mips/scenario-mip
Documented by J. García-Serrano