1. Catherine Senior WGCM-19, October 19th 2015
UK modelling for CMIP6
Catherine Senior
WGCM-19, October 19th 2015
© Crown copyright Met Office

2. UKESM1 components OASIS3-MCT Physical Model: HadGEM3-GC3
New ocean and sea-ice models (NEMO, CICE, Hewitt et al, 2011)
Enhanced vertical resolution: L85
ENDGame dynamical core (Wood et al 2014)
PC2 cloud scheme (Wilson at al, 2008)
Chemistry/Aerosols
UKCA full stratosphere– troposphere chemistry + GLOMAP-mode aerosols
* Simplified version of UKCA chemistry also available employing offline oxidants and full tropospheric sulphur cycle (full UKCA ~4.5 times UM cost, simplified scheme ~1.7 times UM)
Soil-Vegetation coupled Carbon-Nitrogen cycle
JULES+TRIFFID (dynamic vegetation) + soil/veg carbon-nitrogen + wetlands + diagnostic wildfires+ some permafrost improvements
Ocean Biogeochemistry
MEDUSA2 within NEMO ocean model.
Interactive Land ice sheets (Greenland and Antarctic)
BISICLES and ice shelf basal and cavity melt within
NEMO-ORCA.
Coupler
OASIS3-MCT
UKESM1
Atmospheric GCM: Unified Model
Chemistry, aerosols and tracer transport: UKCA-GLOMAP mode
Land Physics and hydrology JULES-CN
Land biogeochemistry and dynamic vegetation: JULES-CN and TRIFFID
Sea Ice: CICE
Coupler: OASIS3 (MCT)
Ocean biogeochemistry
MEDUSA-2
Physical Ocean GCM: ORCA
Land Ice: BISICLES

3. Model configurations Physical model configurations
HadGEM3-GC3-N96ORCA025
HadGEM3-GC3-N216ORCA025
Earth system model configurations: built on HadGEM3-GC3
UKESM1.0-N96ORCA1
UKESM1.0-N216ORCA025hybrid
degraded resolution atm chemistry & ocean BGC

4. UK engagement in CMIP6 (mid 2016-2020)
CMIP ‘DECK’ & Historical
MIPs to be run at MOHC
ScenarioMIP*
DCPP (decadal predictions)
CFMIP (cloud feedbacks)
C4MIP (carbon cycle)*
HighResMIP (high res global models)
DAMIP (detection and attribution)
AerchemMIP (aerosols & chemistry)*
LUMIP (Land use)
RFMIP (Radiative forcing)
GEOMIP (Geo-engineering)
LS3MIP (Land Surface)
and data provision for ISIMIP/CORDEX/VIAAB
* Potentially share some runs with UK academic community, Korea, NZ
UK Academic Community will contribute
simulations using UKESM1/HadGEM3
OMIP/OCMIP (Oceans and biogeochemistry)
ISMIP (Ice sheets)
FAFMIP (Flux anomaly forced)
PMIP (Palaeo)
GMMIP (Global Monsoons)
VolMIP (Volcanoes)

5. MIP experiments HadGEM3-GC3-N96ORCA025 CFMIP, FAFMIP, RFMIP, DAMIP
DCPP, GMMIP, HighResMIP, OMIP (physics)
UKESM1.0-N96ORCA1
AerChemMIP, C4MIP, GEOMIP, ISMIP6, LUMIP, OMIP (physics + BGC), ScenarioMIP, VolMIP, PMIP
UKESM1.0-N216ORCA025hybrid
AerChemMIP, C4MIP, ISMIP, OMIP (physics + BGC), ScenarioMIP (repeat key expts)

6. Schematic outline of proposed senior UM – Junior UM for reduced
resolution UKCA-GLOMAP : prototype UKESM1-hybrid
u, v, w, θvd, η, ρr,π, mx
Chemistry and aerosols
JULES
JULES
Have an extra executable (junior UM with UKCA) so model should scale better

7. ISMIP6 Repeat key CMIP-DECK UKESM1-hybrid
C4MIP, OMIP, AerchemMIP, LUMIP: UKESM1-LR
CFMIP, FAFMIP, RFMIP, DAMIP: HadGEM3-GC3 N96
HighResMIP, DCPP: HadGEM3-GC3 N216
Repeat key C4MIP, AerchemMIP,
LUMIP, ISMIP6 with UKESM1-hybrid
CMIP6 Historical
UKESM1-LR
HadGEM3-GC3 N216/N96
ISMIP6
UKESM1-LR
Repeat key
ScenarioMIP
UKESM1-hybrid
CMIP-DECK
UKESM1-LR
HadGEM3-GC3 N216/N96
ScenarioMIP
UKESM1-LR
Oct
CMIP-DECK
UKESM1-hybrid
CMIP6 Historical
UKESM1-hybrid
Part of CMIP-DECK and historical runs using UKESM1-HR
Likely not full period runs hence not submitted to ESGF
GEOMIP, VolMIP and PMIP planned with UKESM1 – timings to be decided

8. Plan for CMIP6 : Climate Models
Two coupled models for CMIP6 experiments
K-ACE
First attempt of contribution to CMIP (but, still AOGCM)
DECK simulation : understanding of model behavior
HIST and ScenarioMIP simulation : potential for assessment
UKESM1
Assessment of climate change over the East Asian region
Basis to produce National Climate Change Scenario
Understanding of climate change
Historical runs, ScenarioMIP, AerChemMIP, C4MIP, etc.
Increase ensembles, different resolution, different configuration