VIKING20X-JRA-short: daily to multi-decadal ocean dynamics under JRA55-do atmospheric forcing


Getzlaff, Klaus; Schwarzkopf, Franziska U.

VIKING20X-JRA-short (Biastoch et al., 2021) is part of a series of VIKING20X simulations under JRA55-do atmospheric forcing. It is based on a restart from a pre-spun experiment in 1980 (VIKING20X-CORE; see Biastoch et al., 2021) and integrated for the period 1980 to 2019 in the framework of the RACE–Synthesis: Regional Atlantic Circulation and Global Change (
The applied atmospheric forcing JRA55-do (Tsujino et al., 2020, builds on the Japanese reanalysis product JRA-55 with improvements through the implementation of satellite and several other reanalysis products.

Details of the Configuration:
- eddy-rich 1/20° nest using the two-way nesting technique Adaptive Grid Refinement In Fortran (AGRIF; that covers the Atlantic Ocean from 33.5° S to ∼65° N embedded in a 1/4° resolution global grid
- initialization from a pre-spun experiment in 1980
- time step refinement factor 3 between host and nest
- momentum advection scheme in vector form with Hollingsworth correction, conserving both energy and enstrophy
- tracer advection as two-step flux corrected transport, total variance dissipation scheme
- linearized filtered free surface
- weak sea surface salinity restoring towards Levitus WOA98 (piston velocity 12.2 m/yr), suppressed under sea-ice
- thermodynamic, dynamic sea-ice model LIM2 ( with viscous-plastic rheology
- turbulent kinetic energy scheme
- bi-Laplacian lateral viscosity
- non-linear bottom friction

Note of advise on re-using the provided simulation output data
We recommend to only use the high-resolution simulation output data from the 1/20 degree nested region for any analysis (nest file names "1_VIKING20X.L46-KKG36107B_*.nc"). The simulation was designed to improve the understanding of specific key processes in the Atlantic Ocean and their effect on the large scale and inter-hemispheric circulation in the Atlantic.
The simulation results can only be interpreted in this context and are not necessarily applicable to other arbitrary research questions on ocean and climate dynamics. In particular, the output fields of the global simulation at coarser resolution (host file names "VIKING20X.L46-KKG36107B_*.nc") must be understood as an interactive boundary condition to the focus region of the nest and are here provided for completeness only. For questions in this regard we recommend to contact
and generally encourage potential users to reach out to us for clarification.

A detailed description of the configuration and experiments is given in Biastoch et al. (2021):
Biastoch, A., F. U. Schwarzkopf, K. Getzlaff, S. Rühs, T. Martin, M. Scheinert, T. Schulzki, P. Handmann, R. Hummels, and C. W. Böning, 2021, Regional Imprints of Changes in the Atlantic Meridional Overturning Circulation in the Eddy-rich Ocean Model VIKING20X, Ocean. Sci., 17, 1177–1211,
VIKING20X (Simulations with the 1/20° nested Atlantic Ocean ocean-sea-ice model VIKING20X)
Dr. Klaus Getzlaff (
Spatial Coverage
Longitude 0 to 360 Latitude -78 to 90 Altitude: -5875 m to -3 m
Temporal Coverage
1980-01-01 to 2019-12-31 (gregorian)
Use constraints
Creative Commons Attribution 4.0 International (CC BY 4.0) (
Data Catalog
World Data Center for Climate
25.89 TiB (28461294660237 Byte)
completely archived
Creation Date
Future Review Date
Cite as
Getzlaff, Klaus; Schwarzkopf, Franziska U. (2024). VIKING20X-JRA-short: daily to multi-decadal ocean dynamics under JRA55-do atmospheric forcing. World Data Center for Climate (WDCC) at DKRZ.

Federal Ministry of Education and Research
Grant/Award No: 03F0729C - RACE II - Regional Atlantic Circulation and Global Change
European Commission - Horizon 2020 Framework Programme
Grant/Award No: 818123 - iAtlantic - Integrated Assessment of Atlantic Marine Ecosystems in Space and Time
Level 4 (numerical simulation outout)
Findable: 6 of 7 level;
Accessible: 2 of 3 level;
Interoperable: 3 of 4 level;
Reusable: 5 of 10 level
F-UJI online v3.1.0 automated
Method Description
Checks performed by WDCC. Metrics documentation: Metric Version: metrics_v0.5
Result Date
Result Date
1. Number of data sets is correct and > 0: passed;
2. Size of every data set is > 0: passed;
3. The data sets and corresponding metadata are accessible: passed;
4. The data sizes are controlled and correct: passed;
5. The spatial-temporal coverage description (metadata) is consistent to the data, time steps are correct and the time coordinate is continuous: passed;
6. The format is correct: passed;
7. Variable description and data are consistent: passed
WDCC-TQA checklist
Method Description
Checks performed by WDCC. The list of TQA metrics are documented in the 'WDCC User Guide for Data Publication' Chapter 8.1.1
Method Url
Result Date
Contact typePersonORCIDOrganization

Is documented by

[1] DOI Biastoch, Arne; Schwarzkopf, Franziska U.; Getzlaff, Klaus; Rühs, Siren; Martin, Torge; Scheinert, Markus; Schulzki, Tobias; Handmann, Patricia; Hummels, Rebecca; Böning, Claus W. (2021). Regional imprints of changes in the Atlantic Meridional Overturning Circulation in the eddy-rich ocean model VIKING20X. doi:10.5194/os-17-1177-2021

Attached Datasets ( 9 )

Details for selected entry
[Entry acronym: VIKING20XJRAshort] [Entry id: 3952968]