Ozeanzirkulation und Klimadynamik


Global Ocean at 1/4°

Surface Speed in ORCA025. Inlay shows zoomed region of the North Sea and the western part of the Baltic Sea to illustrate the model grid box size..

The 1/4° configuration ORCA025 is a case partially resolving mesoscale eddies (in particular, at low latitudes). At high latitudes, an eddy mixing parameterization is often used. Compared to ORCA05, general improvements are a refined western boundary structure by maintaining a computational efficiency. This compromise makes ORCA025 the current working. It is also increasingly used as base model for the nested configurations (e.g. VIKING20, INALT20).

Person in charge: Klaus Getzlaff


  • NEMO ocean
  • LIM2 sea ice (viscous-plastic rheology)
  • Tripolar ORCA grid
  • Grid Points: 1442 x 1021 x 46
  • Nominal Grid Point Distance: Eq: ~28 km; 60°N: ~15 km
  • Time Step: 2016s
  • Eventually Gent and McWilliams parameterization for eddy mixing
Minimum horizontal grid point distance (km) in ORCA025.


Typical simulations are:

  • Control run (climatological forcing)
  • Hindcast run (interannual forcing, last 60 years)
  • Several sensitivity runs (e.g. to single components of the atmospheric forcing or parameter settings)


Simulations and numerical experiments with this configuration are mostly done using high performance computing facilities at the University CAU in Kiel and HLRN.


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


Jump to: 2018 | 2017 | 2016 | 2015 | 2013 | 2012 | 2011 | 2010 | 2008
Number of items: 22.



Rieck, J. K. , Böning, C. W. and Greatbatch, R. J. (2018) Decadal variability of Eddy Kinetic Energy in the South Pacific Subtropical Countercurrent in an Ocean General Circulation Model. Open Access Journal of Physical Oceanography, 48 (4). pp. 757-771. DOI 10.1175/JPO-D-17-0173.1.


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Ummenhofer, C. C., Biastoch, A. and Böning, C. W. (2017) Multidecadal Indian Ocean variability linked to the Pacific and implications for pre-conditioning Indian Ocean Dipole events. Open Access Journal of Climate, 30 (5). pp. 1739-1751. DOI 10.1175/JCLI-D-16-0200.1.


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Böning, C. W. , Behrens, E., Biastoch, A. , Getzlaff, K. and Bamber, J. L. (2016) Emerging impact of Greenland meltwater on deepwater formation in the North Atlantic Ocean. Nature Geoscience, 9 (7). pp. 523-527. DOI 10.1038/ngeo2740.

Patara, L. , Böning, C. W. and Biastoch, A. (2016) Variability and trends in Southern Ocean eddy activity in 1/12° ocean model simulations. Open Access Geophysical Research Letters, 43 . pp. 4517-4523. DOI 10.1002/2016GL069026.


Tseng, Y. h., Lin, H., Chen, H. c., Thompson, K., Bentsen, M., Böning, C. W. , Bozec, A., Cassou, C., Chassignet, E., Chow, C. H., Danabasoglu, G., Danilov, S., Farneti, R., Fogli, P. G., Fujii, Y., Griffies, S. M., Ilicak, M., Jung, T., Masina, S., Navarra, A., Patara, L. , Samuels, B. L., Scheinert, M. , Sidorenko, D., Sui, C. H., Tsujino, H., Valcke, S., Voldoire, A., Wang, Q. and Yeager, S. G. (2016) North and equatorial Pacific Ocean circulation in the CORE-II hindcast simulations. Ocean Modelling, 104 . pp. 143-170. DOI 10.1016/j.ocemod.2016.06.003.



Kretschmer, K., Biastoch, A. , Rüpke, L. and Burwicz, E. (2015) Modeling the fate of methane hydrates under global warming. Open Access Global Biogeochemical Cycles, 29 (5). pp. 610-625. DOI 10.1002/2014GB005011.


Parmentier, F. J. W., Silyakova, A., Biastoch, A. , Kretschmer, K. and Panieri, G. (2015) Natural marine methane sources in the Arctic. Open Access In: AMAP Assessment 2015: Methane as an Arctic climate forcer. . Arctic Monitoring and Assessment Programme (AMAP), Oslo, Norway, pp. 27-38. ISBN 978-82-7971-091-2

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Rieck, J. K. , Böning, C. W. , Greatbatch, R. J. and Scheinert, M. (2015) Seasonal variability of eddy kinetic energy in a global high-resolution ocean model. Open Access Geophysical Research Letters, 42 (21). pp. 9379-9386. DOI 10.1002/2015GL066152.


Rühs, S. , Getzlaff, K. , Durgadoo, J. V. , Biastoch, A. and Böning, C. W. (2015) On the suitability of North Brazil Current transport estimates for monitoring basin-scale AMOC changes. Open Access Geophysical Research Letters, 42 (19). pp. 8072-8080. DOI 10.1002/2015GL065695.



Behrens, E., Biastoch, A. and Böning, C. W. (2013) Spurious AMOC trends in global ocean sea-ice models related to subarctic freshwater forcing. Ocean Modelling, 69 . pp. 39-49. DOI 10.1016/j.ocemod.2013.05.004.


Fischer, M., Biastoch, A. , Behrens, E. and Baehr, J. (2013) Simulations of a Line W-based observing system for the Atlantic meridional overturning circulation. Ocean Dynamics, 63 (8). pp. 865-880. DOI 10.1007/s10236-013-0632-2.


Ruehs, S. , Durgadoo, J. V. , Behrens, E. and Biastoch, A. (2013) Advective timescales and pathways of Agulhas leakage. Open Access Geophysical Research Letters, 40 (15). pp. 3997-4000. DOI 10.1002/grl.50782.

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Ummenhofer, C. C., Schwarzkopf, F. U. , Meyers, G., Behrens, E., Biastoch, A. and Böning, C. W. (2013) Pacific Ocean Contribution to the Asymmetry in Eastern Indian Ocean Variability. Open Access Journal of Climate, 26 . pp. 1152-1171. DOI 10.1175/JCLI-D-11-00673.1.


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Behrens, E., Schwarzkopf, F. U. , Lübbecke, J. F. and Böning, C. W. (2012) Model simulations on the long-term dispersal of 137Cs released into the Pacific Ocean off Fukushima. Open Access Environmental Research Letters, 7 (3). 034004. DOI 10.1088/1748-9326/7/3/034004.


Gary, S. F., Lozier, M., Biastoch, A. and Böning, C. W. (2012) Reconciling tracer and float observations of the export pathways of Labrador Sea Water. Open Access Geophysical Research Letters, 39 (24). L24606. DOI 10.1029/2012GL053978.


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Feng, M., Böning, C. W. , Biastoch, A. , Behrens, E., Weller, E. and Masumoto, Y. (2011) The reversal of the multi-decadal trends of the equatorial Pacific easterly winds, and the Indonesian Throughflow and Leeuwin Current transports. Open Access Geophysical Research Letters, 38 . L11604. DOI 10.1029/2011GL047291.


Gary, S. F., Lozier, S. M., Böning, C. W. and Biastoch, A. (2011) Deciphering the pathways for the deep limb of the Meridional Overturning Circulation. Deep-Sea Research Part II-Topical Studies in Oceanography, 58 (17-18). pp. 1781-1797. DOI 10.1016/j.dsr2.2010.10.059.


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Rattan, S., Myers, P. G., Treguier, A. M., Theetten, S., Biastoch, A. and Böning, C. W. (2010) Towards an understanding of Labrador Sea salinity drift in eddy-permitting simulations. Ocean Modelling, 35 (1-2). pp. 77-88. DOI 10.1016/j.ocemod.2010.06.007.



Durgadoo, J. V. , Lutjeharms, J. R. E., Biastoch, A. and Ansorge, I. J. (2008) The Conrad Rise as an obstruction to the Antarctic Circumpolar Current. Open Access Geophysical Research Letters, 35 (20). L20606. DOI 10.1029/2008GL035382.


Feng, M., Biastoch, A. , Böning, C. W. , Caputi, N. and Meyers, G. (2008) Seasonal and interannual variations of upper ocean heat balance off the west coast of Australia. Open Access Journal of Geophysical Research: Oceans, 113 . C12025. DOI 10.1029/2008JC004908.

This list was generated on Mon May 25 13:56:58 2020 CEST.



Global + Nest



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