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CORE-IAF with the ACCESS Ocean and Sea Ice Model

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CORE-IAF with the ACCESS Ocean and Sea Ice Model Powered By Docstoc
					       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 (?)




CoECSS, Annual Workshop 2012, Hobart 26 September
     ACCESS = Australian Community Climate and Earth System Simulator

                   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 chemistry
                                   France: CERFACS OASIS 3.2.5 coupling code

                                                                                               ACCESS

                                                                                         ACCESS­OM

                                                                                      et al.
                                                                                 atear istry
                                                                          lia: M       m
                                                                   A ustra iogeoche
                                                                          nB
                                                                   Ocea
                                                          Australia: CABLE carbon, land surface, and vegetation model


• 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.

      CoECSS, Annual Workshop 2012, Hobart 26 September
ACCESS Ocean Model
360x300x50 Levels

Mercator grid in south                              • MOM4p1. NOAA/GFDL Modular Ocean Model (December 2009)
                                                       • Primitive equation ocean model
                                                       • Geophysical Fluid Dynamics Laboratory, USA
                                                       • Community model with world­wide 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
  Tripolar grid in north                                • Dynamic­thermodynamic sea ice model
                                                        • Los Alamos National Laboratory, USA
                                                        • Supports tripolar grids
                                                        • Community model with world­wide user base

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

                                                    • ACCESS­OM coupling interface
                                                        • Written by Dave Bi at CSIRO


CoECSS, Annual Workshop 2012, Hobart 26 September
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.


    0.1 Sv Antarctic Meltwater experiment

                                                      Pacific Islands will feel the effect
                                                      of 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 level
                                                      means that mass can be added
                                                      off­line to interpret studies that
                                                      use virtual salt fluxes.



  CoECSS, Annual Workshop 2012, Hobart 26 September
P. Uotila, S. O’Farrell, S.J. Marsland, D. Bi,
A sea­ice sensitivity study with a global ocean­ice model
Ocean Modelling, 51, July 2012, 1­18, 10.1016/j.ocemod.2012.04.002.

• Sea­ice simulations and extensive tuning
      Momentum stress turning angle, ridging parameters, albedos etc.
.




                                                    summer   winter


CoECSS, Annual Workshop 2012, Hobart 26 September
   ACCESS­CM Submissions to Australian
   Meteorological and Oceanographic Journal
• Bi et al., ACCESS­OM: 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 sea­ice performance of the Australian climate models
  participating in the CMIP5.
• Rashid et al., Evaluation of El Nino­Southern 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: Present­­day simulations and future projections.
• Watterson et al., A skill­score based evaluation of simulated Australian climate.
• Sun et al., Modifications in atmospheric physical parameterization aimed at
  improving SST simulation in the ACCESS coupled­model.
   CoECSS, Annual Workshop 2012, Hobart 26 September
   ACCESS­CM CMIP5 Bi et al., subm to AMOJ
   SST Biases

                         ACCESS1.0                       ACCESS1.3




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.


     CoECSS, Annual Workshop 2012, Hobart 26 September
ACCESS­CM CMIP5 Bi et al., subm to AMOJ
SSS 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.

 CoECSS, Annual Workshop 2012, Hobart 26 September
ACCESS­CM CMIP5 Sea Ice Thickness Bias (m)
Uotilla et al., subm to AMOJ

          GIOMAS                                 ACCESS1.0     ACCESS1.3




                                                                             march




                                                                           september




                                              1981­2000 Mean
 CoECSS, Annual Workshop 2012, Hobart 26 September
ACCESS­CM CMIP5 Sea Ice Thickness Bias (m)
Uotilla et al., subm to AMOJ

          GIOMAS                                 ACCESS1.0     ACCESS1.3




                                                                             march




                                                                           september




                                              1981­2000 Mean
 CoECSS, Annual Workshop 2012, Hobart 26 September
ACCESS­CM CMIP5 Sea Ice Extent
Uotilla et al., subm to AMOJ

                                                     NSIDC
                                                     ACCESS1.0
                                                     ACCESS1.3
                                                     CSIRO­Mk3.6.0



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




 CoECSS, Annual Workshop 2012, Hobart 26 September
ACCESS­CM CMIP5 Ocean Temperature
Marsland et al., subm to AMOJ




 CoECSS, Annual Workshop 2012, Hobart 26 September
ACCESS­CM CMIP5 Sea Level
Marsland et al., subm to AMOJ




 CoECSS, Annual Workshop 2012, Hobart 26 September
  CLIVAR Working Group on Ocean Model Development


   WGOMD Coordinated Ocean­ice Reference Experiments (CORE)
     • http://www.clivar.org/organization/wgomd/core
Uses the modified NCEP/NCAR re­analysis forcing data (Large and Yeager, 2009)

• CORE I Normal Year Forcing (NYF)
   • Quasi­equilibrium (500 year) experiment with climatological forcing
   • Griffies et al., 2009 inter­comparison (7 models)
   • Bi et al., 2012, submitted (ACCESS­OM)
• CORE II Inter­annual Forcing (IAF)
   • 1948­2007 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 sea­level 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
   CoECSS, Annual Workshop 2012, Hobart 26 September
ACCESS­OM CORE­NYF
Zonal mean Temp (left) and Salt (right) biases

                  Temperature                                  Salinity




                                          Years 491­500 Mean




CoECSS, Annual Workshop 2012, Hobart 26 September
ACCESS­OM CORE­NYF
SurfaceTemp (left) and Salt (right) biases
            SST                                                SSS




                                          Years 491­500 Mean



CoECSS, Annual Workshop 2012, Hobart 26 September
ACCESS­OM CORE­NYF
AMOC (left) and Global Overturning (right)

                         Atlantic                                   Global




                                                Year 491­500 Mean




CoECSS, Annual Workshop 2012, Hobart 26 September
ACCESS­OM CORE­NYF
Barotropic Streamfunction and DPT (Sv)




CoECSS, Annual Workshop 2012, Hobart 26 September
 Take Away Message

• ACCESS­CM submitted to CMIP5
• ACCESS­OM 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: simon.marsland@csiro.au

 CoECSS, Annual Workshop 2012, Hobart 26 September

				
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