CLIVAR Working Group on Ocean Model Development WGOMD

1
CLIVAR Working Group on Ocean Model Development
(WGOMD)
Members G. Danabasoglu (co-chair) NCAR, USA H.
Drange (co-chair) U. Bergen, Norway H.
Banks Hadley C., Met Office, UK S.
Griffies GFDL, USA S. Marsland
CSIRO, Australia G. Madec LODYC,
France R. Greatbatch IFM, Germany H. Tsujino
MRI, Japan Emeritus C. Böning
IFM, Germany A. M. Treguier IFREMER, France R.
Gerdes AWI, Germany E. Chassignet
FSU, USA ICPO Contact Anna Pirani
The 8th WGOMD Panel Meeting, 30 April 01 May
2009, Exeter, UK
2
Main WGOMD Activities
(I) Topical workshops facilitating collaboration,
communication, and education - 2004 Princeton
State of the Art in Ocean Climate Modelling
- 2005 Hobart State of the art in Southern
Ocean Modelling - 2007 Bergen Numerical
Methods for Ocean Models - 2009 Exeter
Ocean Mesoscale Eddies Representations,
Parameterizations and
Observations

• - 150 participants,
• 40 posters,
• 18 plenary talks,
• Special edition of Ocean Modelling in 2010,
• Report in CLIVAR Exchanges.

3
Main WGOMD Activities
(II) Reports and White Papers - Griffies et
al. (2009) Sampling Physical Ocean Fields in
WCRP CMIP5 Simulations,
ICPO Publication Series 137,
WCRP Informal Report 3/2009
Recommendations from WGOMD on CMIP5 Ocean Model
Output - Hurrell et al. (2009) Decadal
Climate Prediction Opportunities and Challenges,
CWP
OceanObs 09 - Griffies et al. (2009)
Problems and Prospects in Large-Scale Ocean
Circulation Models,
CWP OceanObs 09 - Latif et al.
(2009) Dynamics of Decadal Climate
Variability and Implications for its Prediction,
CWP OceanObs 09 (III) WGOMD Repository for
Evaluating Ocean Simulations (REOS) (CMIP5)
http//www.clivar.org/organization/wgomd/
reos/reos.php Web-based community tool for
evaluating ocean model simulations that
includes - Access to datasets and
analysis tools, - Metrics for
evaluating variability and processes proposed by
the CLIVAR basin panels,
- Comprehensive bibliography of papers on
datasets and model evaluation, - A
blog/wiki for input and comments from users on
data / methods / papers is
planned.
4
Main WGOMD Activities

• Coordinated Ocean-ice Reference Experiments (CORE
  I-III)
• Benchmark simulations for global
  ocean-ice models with detailed protocols,
• facilitating solution comparisons from
  different models.
• The key goals of CORE are to provide a
  workable and agreeable experimental design for
  global ocean-ice models to be run for long-term
  climate studies and to establish a framework
  where the experimental design is flexible and
  subject to refinement as the community gains
  experience and provides feedback.
• CORE version 2 surface forcing data sets are
  available from the GFDL web site at
  http//data1.gfdl.noaa.gov/nomads/forms/mom4/COREv
  2.html
• ALREADY 60-70 CITATIONS USING A VERSION OF THE
  DATA SETS!
• CORE-I Multi-century simulations with a repeat
  annual cycle forcing, a.k.a. Normal Year Forcing
  (NYF, Large and Yeager 2004, 2008) Griffies et
  al., 2009 Coordinated Ocean-ice Reference
  Experiments (COREs) Ocean Modelling, 26, 1-46.

5
Main WGOMD Activities

• Coordinated Ocean-ice Reference Experiments (CORE
  I-III)
• CORE-II 1948-2006 interannually varying forcing
  (IAF, Large and Yeager 2004, 2008).
• CORE-II hindcast simulations provide a framework
  both to evaluate ocean model performance and to
  investigate mechanisms of ocean phenomena and
  their variability from seasonal to decadal time
  scales.
• These simulations can be used to study the
  attribution of recent ocean-climate events to
  trends and natural variability, in conjunction
  with the CMIP5.
• In particular, CORE-II directly contributes to
• - evaluation, understanding, and
  improvement of the ocean component in ESMs,
• - investigation of mechanisms for
  inter-annual to decadal variability, e.g., AMOC,
• - evaluation of robustness of mechanisms
  across models,
• - providing initial conditions for
  decadal predictability studies.
• CORE-II complements ocean reanalysis from data
  assimilation approaches, particularly for the
  pre-ARGO period.
• Planned/ongoing CORE-II analysis for the
  Atlantic, Indian, Pacific, and Southern Oceans.
• Continued interaction with CLIVAR Basin Panels
  and Working Groups. AOMIP has officially accepted
  CORE-II as their forcing data set.

6
Ocean Climate Model Development Meeting
Venue GFDL, Princeton, NJ, USA, 28-30 October
2009 Purpose Bring together ocean modelers who
focus on the climate scale simulation of the
global ice-ocean system to discuss results and
progress (related to CMIP5 simulations), exchange
ideas, and scope out future directions. Topics
include ocean climate model formulations,
analysis, SGS parameterizations, coupled
modeling, biases, etc.
Next WGOMD Workshop and Panel Meeting
Venue NCAR, Boulder, CO, USA Workshop Decadal
Climate Variability, Predictability, and
Prediction Understanding the Role of the Ocean,
20-22 September 2010. In collaboration with the
U.S. CLIVAR AMOC Science Team, U.S. CLIVAR
Decadal Variability Working Group, .. Panel
Meeting 23-24 September 2010.