Evaluation of the ACCESS Ocean Model Simon Marsland, Dave Bi, Petteri Uotilla, Arnold Sullivan and Katja Lorbacher CAWCR/CMAR, Aspendale CoECSS, Annual

Evaluation of the ACCESS Ocean Model

Simon Marsland, Dave Bi, Petteri Uotilla, Arnold Sullivan and Katja Lorbacher

CAWCR/CMAR, Aspendale

CoECSS, Annual Workshop 2012, Hobart 26 September

Overview


• ACCESS Ocean Model• Evaluation = “to find the value of”• Papers published (2)• Papers submitted (10)• International collaborations (4)• National collaborations (?)


ACCESS = Australian Community Climate and Earth System Simulator

• ACCESS is being developed by the Centre for Australian Weather and Climate Research, a partnership between CSIRO and the Bureau of Meteorology, with Australian universities

• It will deliver national capability in numerical weather prediction, seasonal forecasting, ocean climate modelling, and coupled model climate change simulation.

ACCESS-OM

ACCESS

USA: Los Alamos National Laboratory CICE4.0 sea ice code

USA: NOAA/Geophysical Fluid Dynamics Laboratory MOM4p1 ocean code

UK: Met Office Unified Model atmospheric code + UKCA chemistryFrance: CERFACS OASIS 3.2.5 coupling code

Australia: Matear et al.

Ocean Biogeochemistry

Australia: CABLE carbon, land surface, and vegetation model


ACCESS Ocean Model360x300x50 Levels

• MOM4p1. NOAA/GFDL Modular Ocean Model (December 2009)• Primitive equation ocean model• Geophysical Fluid Dynamics Laboratory, USA• Community model with world-wide user base• Generalised orthogonal horizontal coordinates (tripolar)• z* and p* vertical coordinate systems• Choice of many physical parameterisation schemes

• Abyssal tides• Coastal tides• Submesoscale mixed layer eddies• Neutral physics

• CMIP5 diagnostic suite

• CICE4.1 LANL sea ice model• Dynamic-thermodynamic sea ice model• Los Alamos National Laboratory, USA• Supports tripolar grids• Community model with world-wide user base

• OASIS 3.2.5. Coupling system• Developed by CERFACS, France• Message Passing Interface

• ACCESS-OM coupling interface• Written by Dave Bi at CSIRO

Mercator grid in south

Tripolar grid in north

Lorbacher, K., S.J. Marsland, J.A. Church, S.M. Griffies, and D. Stammer Rapid barotropic sea level rise from ice sheet melting, J. Geophys. Res., 117, C06003, doi:10.1029/2011JC007733, June 2012.

Pacific Islands will feel the effectof Greenland and Antarctic meltwaters much faster than previously claimed.

Requires use of real rather than virtual freshwater fluxes

i.e. Have to add the mass!

Linear response of sea levelmeans that mass can be added off-line to interpret studies thatuse virtual salt fluxes.


0.1 Sv Antarctic Meltwater experiment

P. Uotila, S. O’Farrell, S.J. Marsland, D. Bi, A sea-ice sensitivity study with a global ocean-ice model Ocean Modelling, 51, July 2012, 1-18, 10.1016/j.ocemod.2012.04.002.

• Sea-ice simulations and extensive tuning Momentum stress turning angle, ridging parameters, albedos etc.

.


summer winter

ACCESS-CM Submissions to Australian Meteorological and Oceanographic Journal


• Bi et al., ACCESS-OM: the Ocean and Sea ice Core of the ACCESS Coupled Model.

• Bi et al., The ACCESS Coupled Model: Description, Control Climate and Evaluation.

• Marsland et al., Evaluation of ACCESS Climate Model ocean diagnostics in CMIP5 simulations.

• Uotila et al., The sea-ice performance of the Australian climate models participating in the CMIP5.

• Rashid et al., Evaluation of El NinJ o-Southern Oscillation in the ACCESS coupled model simulations for CMIP5.

• Dix et al., The ACCESS Coupled Model: Documentation of core CMIP5 simulations and initial results.

• Kowalczyk et al., The land surface model component of ACCESS: description and impact on the simulated surface climatology.

• Rashid et al., Atmospheric circulations in the ACCESS model simulations for CMIP5: Present- day simulations and future projections.

• Watterson et al., A skill-score based evaluation of simulated Australian climate. • Sun et al., Modifications in atmospheric physical parameterization aimed at

improving SST simulation in the ACCESS coupled-model.

ACCESS-CM CMIP5 Bi et al., subm to AMOJSST Biases


Figure 14 SST biases of ACCESS1.0 and ACCESS1.3 historical climate. The reference data is the HadISST (Rayner et al. 2003) 30-year observation over 1976-2005. Units: °C.

ACCESS1.0 ACCESS1.3

ACCESS-CM CMIP5 Bi et al., subm to AMOJSSS Biases


ACCESS1.0 ACCESS1.3

Figure 16 HIST run present-day annual mean SSS biases (model – WOA2009 data): a) ACCESS1.0, and b) ACCESS1.3. Units: psu.

ACCESS-CM CMIP5 Sea Ice Thickness Bias (m)Uotilla et al., subm to AMOJ


GIOMAS ACCESS1.0 ACCESS1.3

march

september

1981-2000 Mean

ACCESS-CM CMIP5 Sea Ice Thickness Bias (m)Uotilla et al., subm to AMOJ


GIOMAS ACCESS1.0 ACCESS1.3

march

september

1981-2000 Mean

ACCESS-CM CMIP5 Sea Ice Extent Uotilla et al., subm to AMOJ


NSIDCACCESS1.0ACCESS1.3CSIRO-Mk3.6.0

RCP4.5 (solid)RCP8.5 (dash)

ACCESS-CM CMIP5 Ocean TemperatureMarsland et al., subm to AMOJ


ACCESS-CM CMIP5 Sea LevelMarsland et al., subm to AMOJ



CLIVAR Working Group on Ocean Model Development

WGOMD Coordinated Ocean-ice Reference Experiments (CORE)• http://www.clivar.org/organization/wgomd/core

• CORE I Normal Year Forcing (NYF)• Quasi-equilibrium (500 year) experiment with climatological forcing

• Griffies et al., 2009 inter-comparison (7 models)

• Bi et al., 2012, submitted (ACCESS-OM)

• CORE II Inter-annual Forcing (IAF)• 1948-2007 hindcast experiments

• Danabasoglu et al., 2012, in prep, AMOC and subpolar gyre variability

• Griffies et al., 2012, in prep, Can forced ocean models reproduce the thermosteric sea-level change of the late 20th century?

• Downes et al., 2012, in prep, Southern Ocean dynamics and ACC

• Treguier et al., 2012, in prep, South Atlantic variability

• … more to come

Uses the modified NCEP/NCAR re-analysis forcing data (Large and Yeager, 2009)

ACCESS-OM CORE-NYFZonal mean Temp (left) and Salt (right) biases


Years 491-500 Mean

Temperature Salinity

ACCESS-OM CORE-NYFSurfaceTemp (left) and Salt (right) biases


Years 491-500 Mean

SST SSS

ACCESS-OM CORE-NYFAMOC (left) and Global Overturning (right)


Atlantic Global

Year 491-500 Mean

ACCESS-OM CORE-NYFBarotropic Streamfunction and DPT (Sv)


Take Away Message


• ACCESS-CM submitted to CMIP5• ACCESS-OM is being used for a variety of science applications• Collaborations are spinning up with CoECSS (next talk)• Plenty of opportunity for building collaboration between CAWCR and CoECSS

Thank you: [email protected]

Documents

Evaluation of the ACCESS Ocean Model Simon Marsland, Dave Bi, Petteri Uotilla, Arnold Sullivan and Katja Lorbacher CAWCR/CMAR, Aspendale CoECSS, Annual