Model output data from UKESM1 and HadGEM3-GC3.1 is now being published on the Earth system grid federation (ESGF). See below of a summary of the data which is available now, and that which will be published soon. To download the data, go to the CEDA ESGF node. To search for the UK models specifically, you will need to select the corresponding “Source ID”. These are abbreviations of the full model names to comply with CMIP technical requirements:

ModelResolutionCMIP Source IDDECK simulations
UKESM1.0N96ORCA1UKESM1-0-LLPublished
HadGEM3-GC3.1N96ORCA1HadGEM3-GC31-LLCompleted, to be published soon
HadGEM3-GC3.1N216ORCA025HadGEM3-GC31-MMCompleted, to be published
HadGEM3-GC3.1N512ORCA025HadGEM3-GC31-HMNone, see note 2
HadGEM3-GC3.1N96ORCA025HadGEM3-GC31-LMNone, see note 2

Table notes:

  1. LL, HM etc are abbreviations for the model resolution (Low, Medium, High). The first letter indicates the atmosphere resolution; the second indicates the ocean resolution.
  2. DECK is a set of core experiments for CMIP, consisting of: piControl, abrupt4xCO2, 1pctCO2, AMIP. The N512ORCA025 and N96ORCA025 resolutions of HadGEM3-GC3.1 are used solely for HighResMIP; there are no DECK experiments for these configurations.

The data published so far consists of monthly and daily frequency data for a high-priority subset of variables. More variables and frequencies will follow.

Data published (a subset of monthly and daily frequency variables):

  • UKESM1.0-N96ORCA1 DECK
  • UKESM1.0-N96ORCA1 Historical: 9 ensemble members
  • UKESM1.0-N96ORCA1 ScenarioMIP: Tier 1 and Tier 2 scenarios; 5 ensemble members
  • HadGEM3-GC3.1-(various resolutions): HighResMIP
  • HadGEM3-GC3.1-N96ORCA1 DECK (though part of piControl is still to be published)

Available soon (a subset of monthly and daily frequency variables):

  • HadGEM3-GC3.1-N96ORCA1 DECK (remainder of piControl, additional members for 1pctCO2 & AMIP)
  • HadGEM3-GC3.1-N96ORCA1 historical: 4 ensemble members
  • Additional variables for all of the experiments above

Technical documentation:

Background to CMIP6

As modeling capability has advanced, the need to quantitatively evaluate Earth System Models (ESMs) has also grown. To address this, Working Group on Coupled Modeling (WGCM) of the World Climate Research Programme (WCRP) has initiated a series of Coupled Model Intercomparison Projects (CMIP). In preparation for the IPCC Sixth Assessment, the CMIP Phase 6, CMIP6, was launched. A brief summary can be found in the following overview presentation (CMIP6FinalDesign_GMD_160603.pdf).

The organization of CMIP6 is more distributed than in previous rounds. It contains twenty individual Model Intercomparison Projects (MIPs), each focused on a specific area of Earth system science. In addition, there is a set of fundamental (or DECK) experiments which will be run for each model in order to characterize its performance, and provide a reference point for the various MIP experiments. See the World Climate Research Programme website for more details on CMIP6 and the underlying MIPs that constitute CMIP6.

The UK contribution to CMIP6

CMIP6 will be an important application of UKESM models. CMIP6 aims to improve our understanding of, and ability to simulate, key climate phenomena and future climate change using a coordinated multi-model approach. In CMIP6, UKESM1 and other climate models from around the world will be integrated using a common set of experiment protocols to address a range of key science questions.

The UK contribution to CMIP6 will come from the Met Office, NERC centres and UK universities and is being coordinated through a number of thematic groups (see the article in Newsletter No 2:UK Plans for CMIP6for more information) currently working on tasks such as:

  • ensuring model components meet the technical requirements for CMIP6;
  • providing technical support for model runs, data conversion and delivery;
  • sharing good practice (including experiment setup) across MIPs and coordinating MIP numerical experiments.

More detailed information about CMIP6 workshops and UK preparations for CMIP6 is available on the Met Office website (https://code.metoffice.gov.uk/trac/ukcmip6/).

For more information about the UK CMIP6 workshop held on Feb 27th in Oxford, please visit https://ukesm.ac.uk/cmip6/uk-cmip6-workshop-feb2019-oxford/.