Coordinated Ocean-ice Reference Experiments - Phase II

Coordinated Ocean-ice Reference Experiments (COREs) were proposed by the CLIVAR Working Group on Ocean Model Development (WGOMD) as a venue for comparing global ocean-sea ice models run under a common prescribed atmospheric state, with boundary fluxes computed via the same bulk formulae. CORE simulations complement the coupled climate and earth system models run for the Coupled Model Intercomparison Project (CMIP). Efforts across a broad community of modelling groups have produced CORE Phase 2 hindcast simulations (CORE-II) using 60 years (1948-2007) of inter-annual forcing.

The CORE-II simulations provide a framework to evaluate ocean model performance, to study mechanisms of ocean phenomena and their variability from seasonal to decadal timescales, to identify forced variability changes, and to develop mechanistic descriptions of observed climate variability and change.

Documentation
Participating Groups
Data Access
Multi-Model Analyses
Ocean Modelling Special Issue
Tools and Scripts
Contact
Ocean-sea ice Related Studies

Documentation

CORE Release Notes

The document describes the datasets and protocol for running global ocean-ice climate models according to the CLIVAR Working Group on Ocean Model Development (WGOMD) Coordinated Ocean-ice Reference Experiments (COREs).

Griffies, S. M., Winton, M., Samuels, B., Danabasoglu, G., Yeager, S., Marsland, S., Drange., H., and Bentsen, M., 2012: Datasets and protocol for the CLIVAR WGOMD Coordinated Ocean-sea ice Reference Experiments (COREs), WCRP Report No. 21/2012, pp. 21

CORE IAF.v2 Air Sea Flux Data Set

Version 2 of the Coordinated Ocean-ice Reference Experiments (CORE) datasets used for forcing global ocean-ice models has been released. The interannually varying forcing (CORE IAF.v2) now extends from 1948-2007. The data is available for download from the GDFL server, and is documented in:

Large, W.G. and S.G. Yeager. 2009: The global climatology of an interannually varying air-sea flux data set. Climate Dynamics, 33, 341-364, doi:10.1007/s00382-008-0441-3.

Participating Groups

Data Access

The NCAR super-computing lab has agreed to host and help with the curation of the CORE-II data produced by the participating groups. The infrastructure is currently being tested. Guidelines on how to access the dataset will be posted here and sent to the CORE Email List as soon as the data is available. In the meantime, data can be requested from the individual modeling groups.

Multi-Model Analyses

We invite participants that intend to analyse the CORE-2 mulit-model data set to provide a working title of the study and a contact person to avoid duplication of effort and maximise collaboration.
 

Ocean Modelling CORE-II Special Issue

Download Announcement

Ocean Modelling solicits manuscripts that document aspects of the CORE-II simulations. Manuscripts should compare simulations across a
suite of models, as well as to observational analyses where available. The journal is particularly interested in manuscripts that thoroughly and
pedagogically document the state-of-the-science in a particular aspect of global ocean-sea ice modelling available through the CORE-II
protocol. Ocean Modelling will publish peer-review CORE-II papers in a virtual Special Issue, meaning that accepted papers will appear in the
journal as per a normal submission, but will be stamped as part of the CORE-II Special Issue and will be linked online to other CORE-II papers.
The deadline for acceptance into the CORE-II Special Issue is 31st December 2014.

Tools and Scripts

Generic analysis and plotting scripts can be made freely available to the community here.

Contact

For any additional information please contact Anna Pirani of the International CLIVAR Project Office. Sign up to the CORE Email List to receive updates, information on multi-model analyses, etc:

Ocean-sea ice Related Studies

Alvarez-Garcia, F., M. Latif, and A. Biastoch, 2008: On multidecadal and quasi-decadal North Atlantic variability, J. Climate, 21, 3433-3452.

The DRAKKAR Group: B. Barnier, L. Brodeau, J. Le Sommer, J.-M Molines, T. Penduff, S. Theetten, A.-M. Treguier, G. Madec, A. Biastoch, C. Böning, J. Dengg, S. Gulev, R. Bourdallé Badie, J. Chanut, G., Garric, S. Alderson, A. Coward, B. de Cuevas, A. New, K. Haines, G. Smith, S. Drijfhout, W. Hazeleger, C. Severijns, P. Myers, 2007: Eddy-Permitting Ocean Circulation Hindcasts of Past Decades, Clivar Exchanges, 12, 8-10.

Barnier. B., G. Madec, T. Penduff, J.-M. Molines, A.-M. Treguier, A. Beckmann, A. Biastoch, C. Böning, J. Dengg, S. Gulev, J. Le Sommer, E. Remy, C. Talandier, S. Theetten, M. Maltrud, 2005: Impact of partial steps and momentum advection schemes in a global ocean circulation model at eddy permitting resolution, Ocean Dynamics, doi: 10.1007/s10236-006-0082-1.

Biastoch, A., Böning, C.W.; Getzlaff, J.; Molines, J.-M.; Madec, G.; 2007: Causes of Interannual–Decadal Variability in the Meridional Overturning Circulation of the Midlatitude North Atlantic Ocean. J. Clim., 21, doi: 10.1175/2008JCLI2404.1, 6599-6615.

Biastoch, A, C. W. Böning, and J. R. E. Lutjeharms, 2008: Agulhas leakage dynamics affects decadal variability in Atlantic overturning circulation, Nature, 456, doi:10.1038/nature07426, 489-492.

Biastoch, A, J. R. E. Lutjeharms, C. W. Böning, and M. Scheinert, 2008: Mesoscale perturbations control inter-ocean exchange south of Africa, Geophys. Res. Lett., 35, doi:10.1029/2008GL035132.

Capotondi, A., M. Alexander, C. Deser, and M.J. McPhaden, 2005: Anatomy and decadal evolution of the Pacific subtropical-tropical cells (STCs). J. Climate, 18, 3739-3758.

Capotondi, A., M. Alexander, C. Deser, and A.J. Miller, 2005: Low frequency pycnocline variability in the Northeast Pacific, J. Phys. Oceanogr., 35, 1403-1420.

Danabasoglu, G., S. Peacock, K. Lindsay, and D. Tsumune, 2009: Sensitivity of CFC-11 uptake to physical initial conditions and interannually varying surface forcing in a global ocean model. Ocean Modelling, doi:10.1016/j.ocemod.2009.02.011, in press.

Deser, C., A. Capotondi, R. Saravanan, and A. Phillips, 2006: Tropical Pacific and Atlantic climate variability in CCSM3. J. Climate, 19, 2451-2481.

Doney, S.C., S. Yeager, G. Danabasoglu, W.G. Large, and J.C. McWilliams, 2003: Modeling global oceanic inter-annual variability (1958-1997): Simulation design and model-data evaluation. NCAR/TN-452+STR.

Doney, S.C., S. Yeager, G. Danabasoglu, W.G. Large, and J.C. McWilliams, 2007: Mechanisms governing interannual variability of upper-ocean temperature in a global hindcast simulation. J. Phys. Oceanogr., 37, 1918-1938.

Durgadoo, J. V., J. R. E. Lutjeharms, A. Biastoch, and I. J. Ansorge, 2008: The Conrad Rise as an obstruction to the Antarctic Circumpolar Current, Geophys. Res. Lett., 35, L20606, doi:10.1029/2008GL035382.

Feng, M., A. Biastoch, C. Böning, N. Caputi and G. Meyers, 2008: Seasonal and interannual variations of upper ocean heat balance off the west coast of Australia. .J. Geophys. Res., 113, C12025, doi:10.1029/2008JC004908.

Gent, P.R., F.O. Bryan, G. Danabasoglu, K. Lindsay, D. Tsumune, M.W. Hecht, and S.C. Doney, 2006: Ocean chlorofluorocarbon and heat uptake during the twentieth century in CCSM3. J. Climate, 19, 2366-2381.

Kauker, F., C. Köberle, R. Gerdes, and M. Karcher, 2008: Modeling the 20th century Arctic Ocean/Sea Ice system: Reconstruction of surface forcing. JGR-Oceans, accepted.

Large, W.G., and G. Danabasoglu, 2006: Attribution and impacts of upper-ocean biases in CCSM3. J. Climate, 19, 2325-2346.

Latif, M., C. W. Böning, J. Willebrand, A. Biastoch, F. Alvarez, N. Keenlyside, and H. Pohlmann, 2007: Decadal to multidecadal variability of the Atlantic MOC: Mechanisms and Predictability, in Schmittner, A. J. C. H.  Chiang, S. R. Hemming (Eds.) : Ocean Circulation: Mechanisms and Impacts - Past and Future Changes of Meridional Overturning, AGU Monograph 173, American Geophysical Union, 149 -166.

Latif, M., C. Böning, J. Willebrand, A. Biastoch, J. Dengg, N. Keenlyside, G. Madec, and U. Schweckendiek, 2005: Is the thermohaline circulation changing? J. Climate, 19, 4631-4637.

Lübbecke, J., C. W. Böning, and A. Biastoch, 2008: Variability in the subtropical-tropical cells and its effect on near-surface temperature of the equatorial Pacific: a model study. Ocean Sci., 4, 73-88.

McWilliams, J.C., and G. Danabasoglu, 2002: Eulerian and eddy-induced meridional overturning circulations in the tropics. J. Phys. Oceanogr., 32, 2054-2071.

Siedler, G., M. Rouault, A. Biastoch, B. Backeberg, C. J. C. Reason, and J. R. E. Lutjeharms, 2009: Modes of the southern extension of the East Madagascar Current, J. Geophys. Res., in press.

Solomon, A., and I. Wainer, 2006: Pacific tropical-extratropical thermocline water mass exchanges in the NCAR CCSM3. Ocean Modelling, doi:10.1016/j.ocemod.2006.04.003.

Solomon, A., and D. Zhang, 2006: Pacific Subtropical Cell variability in coupled climate model simulations of the late 19th- 20th Century. Ocean Modelling, doi:10.1016/j.ocemod.2006.03.007.

Yeager, S., and W.G. Large, 2004: Late-winter generation of spiciness on subducted isopycnals. J. Phys. Oceanogr., 34, 1528-1547.

Yeager, S. G., and W. G. Large, 2007: Observational evidence of winter spice injection. J. Phys. Oceanogr., 37, 2895-2919, doi:10.1175/2007JPO3629.1.

Yeager, S. G., and M. Jochum, 2009: The connection between Labrador Sea buoyancy loss, Deep Western Boundary Current strength, and Gulf Stream path in an ocean circulation model. Ocean Modelling, submitted.