Ocean Circulation and Climate Dynamics

ORCA12

Global Ocean at 1/12°

Surface Speed in ORCA12. Inlay shows zoomed region of the North Sea and the western part of the Baltic Sea to illustrate the model grid box size.

To explore the interaction between regions of strong mesoscale activity (e.g. usually resolved by local AGRIF nests), a global high resolution model is needed. ORCA12, with a horizontal resolution of 1/12°, provides this link. However, in subpolar and subarctic regions a higher resolution is needed to resolve mesoscale eddies. This is realized in the 1/20° AGRIF configurations (e.g., VIKING20, INALT20).

Person in charge: Markus Scheinert

Characteristics

  • NEMO ocean
  • LIM2 sea ice (elastic-viscous rheology)
  • Tripolar ORCA grid
  • Grid Points: 4322 x 3059 x 46
  • Nominal Grid Point Distance: Eq: ~9 km; 60°N: ~5 km
  • Time Step: 480s
  • CORE-II Bulk forcing
Minimum horizontal grid point distance (km) in ORCA12.

Simulations

The large size of the ORCA12 model (in terms of computing resources and file size) only allows short experiments (typically, 10-30 years). This effort is only achievable through coordinated experiments within the European DRAKKAR collaboration.

  • Hindcast experiment (interannual forcing, past 20-30 years)

HPC

Simulations are run using the high performance computing facilities of DKRZ.

Data

Data is available only internally. For data requests from outside GEOMAR, please contact the Model and Data Management (see right column).

Projects

ORCA12 runs are used within the following projects:

  • RACE
  • SFB754
  • R'Eddy

Publications

Jump to: 2015 | 2013
Number of items: 2.

2015

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Steinle, L., Graves, C. A., Treude, T., Ferré, B., Biastoch, A., Bussmann, I., Berndt, C., Krastel, S., James, R. H., Behrens, E., Böning, C. W., Greinert, J., Sapart, C. J., Scheinert, M., Sommer, S., Lehmann, A. F. and Niemann, H. (2015) Water column methanotrophy controlled by a rapid oceanographic switch. Nature Geoscience, 8 (5). pp. 378-382. DOI 10.1038/ngeo2420.

2013

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Deshayes, J., Tréguier, A. M., Barnier, B., Lecointre, A., Sommer, J. L., Molines, J. M., Penduff, T., Bourdallé-Badie, R., Drillet, Y., Garric, G., Benshila, R., Madec, G., Biastoch, A., Böning, C. W., Scheinert, M., Coward, A. C. and Hirschi, J. J. M. (2013) Oceanic hindcast simulations at high resolution suggest that the Atlantic MOC is bistable. Geophysical Research Letters, 40 (12). pp. 3069-3073. DOI 10.1002/grl.50534.

This list was generated on Thu Oct 19 09:27:45 2017 CEST.

Gallery

Models

Global


Global + Nest

 


Regional
Process-oriented

Model and Data Management

For general questions about the model configurations and data access, please contact:

Dr. Markus Scheinert
West Shore Building
Room 427
Phone: 0431 600-4014
email: mscheinert(at)geomar.de

Dr. Klaus Getzlaff
West Shore - Alte Botanik
Room 51
Phone: 0431 600-4179
email: kgetzlaff(at)geomar.de