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

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 ( https://race-synthese.de ).

The applied atmospheric forcing JRA55-do (Tsujino et al., 2020, http://doi.org/10.5194/gmd-13-3643-2020 ) 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; http://doi.org/10.1016/j.cageo.2007.01.009 ) 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 ( https://doi.org/10.1029/97JC00480 ) 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 datamanagement@geomar.de 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, http://doi.org/10.5194/os-17-1177-20 21

Simple

Date (Publication)
2024-03-07
Edition

1

Citation identifier
VIKING20XJRAshort
Citation identifier
doi:10.26050/WDCC/VIKING20XJRAshort
Principal investigator
  GEOMAR Helmholtz Centre for Ocean Research Kiel - Dr. Klaus Getzlaff
not filled
Author
  GEOMAR Helmholtz Centre for Ocean Research Kiel - Dr. Klaus Getzlaff
not filled
Author
  GEOMAR Helmholtz Centre for Ocean Research Kiel - Dr. Franziska U. Schwarzkopf
not filled
Publisher
  WDC Climate at DKRZ
Point of contact
  GEOMAR Helmholtz Centre for Ocean Research Kiel - Dr. Klaus Getzlaff
https://www.geomar.de/en/idrz/digital-research-services
Name

NetCDF

Keywords
  • ATMOSPHERIC/OCEAN INDICATORS

Keywords
  • Atlantic Meridional Overturning Circulation

Keywords
  • NEMO3.6

Keywords
  • OCEAN CURRENTS

Keywords
  • OCEAN UPWELLING

Keywords
  • RACE

Keywords
  • THERMOHALINE CIRCULATION

Keywords
  • VIKING20X

Keywords
  • model-output

Keywords
  • ocean simulation

Use limitation

CC-BY-4.0: Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/

Language

eng; USA

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S
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Begin date
1980-01-01
End date
2019-12-31
Supplemental Information

info:eu-repo/grantAgreement/BMBF//03F0729C/DE//RACE II - Regional Atlantic Circulation and Global Change

info:eu-repo/grantAgreement/EC/H2020/818123/BE//iAtlantic - Integrated Assessment of Atlantic Marine Ecosystems in Space and Time

Distribution format
  • NetCDF ()

Transfer size
28461295
OnLine resource
https://www.wdc-climate.de/ui/entry?acronym=VIKING20XJRAshort
Hierarchy level
collection

Non quantitative attribute accuracy

Name of measure

n/a

Measure description

None

Attribute description
not filled
Descriptor

not filled; unit: W m-2

Attribute description
net_downward_shortwave_flux_at_sea_water_surface
Descriptor

net_downward_shortwave_flux_at_sea_water_surface [CF-Standard Name]; unit: W m-2

Attribute description
sea_ice_x_velocity
Descriptor

sea_ice_x_velocity [CF-Standard Name]; unit: m s-1

Attribute description
ocean_mixed_layer_thickness_defined_by_sigma_theta
Descriptor

The ocean mixed layer is the upper part of the ocean, regarded as being well-mixed. The base of the mixed layer defined by temperature, sigma or sigma_theta is the level at which the quantity indicated differs from its surface value by a certain amount. [CF-Standard Name]; unit: m

Attribute description
sea_surface_temperature
Descriptor

Sea surface temperature is usually abbreviated as "SST". It is the temperature of sea water near the surface (including the part under sea-ice, if any), and not the skin temperature, whose standard name is surface_temperature. For the temperature of sea water at a particular depth or layer, a data variable of sea_water_temperature with a vertical coordinate axis should be used. [CF-Standard Name]; unit: degC

Attribute description
cell_thickness
Descriptor

Ocean Model Cell Thickness [CF-Standard Name]; unit: m

Attribute description
not filled
Descriptor

not filled; unit: W m-2

Attribute description
sea_water_potential_temperature
Descriptor

sea_water_potential_temperature [CF-Standard Name]; unit: degC

Attribute description
surface_downward_heat_flux_in_sea_water
Descriptor

surface_downward_heat_flux_in_sea_water [CF-Standard Name]; unit: W m-2

Attribute description
sea_surface_height_above_geoid
Descriptor

sea_surface_height_above_geoid [CF-Standard Name]; unit: m

Attribute description
sea_ice_thickness
Descriptor

sea_ice_thickness [CF-Standard Name]; unit: m

Attribute description
not filled
Descriptor

not filled; unit: m s-1

Attribute description
sea_ice_y_velocity
Descriptor

sea_ice_y_velocity [CF-Standard Name]; unit: m s-1

Attribute description
wind_speed
Descriptor

Speed is the magnitude of velocity. Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward_air_velocity.) The wind speed is the magnitude of the wind velocity.[CF-Standard Name]; unit: m s-1

Attribute description
not filled
Descriptor

not filled; unit: 1

Attribute description
surface_snow_thickness
Descriptor

surface_snow_thickness [CF-Standard Name]; unit: m

Attribute description
surface_downward_x_stress
Descriptor

surface_downward_x_stress [CF-Standard Name]; unit: N m-2

Attribute description
sea_water_x_velocity
Descriptor

A velocity is a vector quantity. "x" indicates a vector component along the grid x-axis, positive with increasing x. [CF-Standard Name]; unit: m s-1

Attribute description
water_flux_out_of_sea_water_due_to_newtonian_relaxation
Descriptor

The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. The water_flux_out_of_sea_water_due_to_newtonian_relaxation is the freshwater leaving as a result of the Newtonian relaxation of the sea surface salinity. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. [CF-Standard Name]; unit: kg m-2 s-1

Attribute description
sea_binary_mask
Descriptor

[CF-Standard Name]; unit: 1

Attribute description
surface_downward_x_stress
Descriptor

surface_downward_x_stress [CF-Standard Name]; unit: N m-2

Attribute description
ocean_mixed_layer_thickness_defined_by_sigma_theta
Descriptor

The ocean mixed layer is the upper part of the ocean, regarded as being well-mixed. The base of the mixed layer defined by temperature, sigma or sigma_theta is the level at which the quantity indicated differs from its surface value by a certain amount. [CF-Standard Name]; unit: m

Attribute description
sea_water_practical_salinity
Descriptor

cf:Practical Salinity, S_P, is a determination of the salinity of sea water, based on its electrical conductance. The measured conductance, corrected for temperature and pressure, is compared to the conductance of a standard potassium chloride solution, producing a value on the Practical Salinity Scale of 1978 (PSS-78). This name should not be used to describe salinity observations made before 1978, or ones not based on conductance measurements. Conversion of Practical Salinity to other precisely defined salinity measures should use the appropriate formulas specified by TEOS-10. Other standard names for precisely defined salinity quantities are sea_water_absolute_salinity (S_A); sea_water_preformed_salinity (S_*), sea_water_reference_salinity (S_R); sea_water_cox_salinity (S_C), used for salinity observations between 1967 and 1977; and sea_water_knudsen_salinity (S_K), used for salinity observations between 1901 and 1966. Salinity quantities that do not match any of the precise definitions should be given the more general standard name of sea_water_salinity. Reference: www.teos-10.org; Lewis, 1980 doi:10.1109/JOE.1980.1145448. [CF-Standard Name]; unit: 1e-3

Attribute description
water_flux_out_of_sea_ice_and_sea_water
Descriptor

"Water" means water in all phases. The water_flux_out_of_sea_ice_and_sea_water is the freshwater leaving the ocean as a result of precipitation, evaporation, river outflow and any water flux relaxation(s) and correction(s) that may have been applied. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. [CF-Standard Name]; unit: kg m-2 s-1

Attribute description
sea_ice_area_fraction
Descriptor

sea_ice_area_fraction [CF-Standard Name]; unit: 1

Attribute description
surface_downward_y_stress
Descriptor

surface_downward_y_stress [CF-Standard Name]; unit: N m-2

Attribute description
sea_water_y_velocity
Descriptor

A velocity is a vector quantity. "y" indicates a vector component along the grid y-axis, positive with increasing y. [CF-Standard Name]; unit: m s-1

Attribute description
net_downward_shortwave_flux_at_sea_water_surface
Descriptor

net_downward_shortwave_flux_at_sea_water_surface [CF-Standard Name]; unit: W m-2

Attribute description
surface_temperature
Descriptor

The surface called "surface" means the lower boundary of the atmosphere. The surface temperature is the (skin) temperature at the interface, not the bulk temperature of the medium above or below. [CF-Standard Name]; unit: degC

Attribute description
sea_surface_salinity
Descriptor

The unit of salinity is PSU, which is dimensionless. The units attribute should be given as 1e-3 or 0.001 i.e. parts per thousand if salinity is in PSU. Sea surface salinity is often abbreviated as "SSS". For the salinity of sea water at a particular depth or layer, a data variable of sea_water_salinity with a vertical coordinate axis should be used. [CF-Standard Name]; unit: 1e-3

Attribute description
surface_downward_y_stress
Descriptor

surface_downward_y_stress [CF-Standard Name]; unit: N m-2

Attribute description
ocean_mixed_layer_thickness_defined_by_vertical_tracer_diffusivity
Descriptor

The ocean mixed layer is the upper part of the ocean, regarded as being well-mixed. The base of the mixed layer defined by temperature, sigma, sigma_theta, or vertical diffusivity is the level at which the quantity indicated differs from its surface value by a certain amount. The amount by which the quantity differs can be specified by a scalar coordinate variable. [CF-Standard Name]; unit: m

Attribute description
heat_flux_into_sea_water_due_to_newtonian_relaxation
Descriptor

The specification of a physical process by the phrase due_to_process means that the quantity named is a single term in a sum of terms which together compose the general quantity named by omitting the phrase. The heat_flux_into_sea_water_due_to_newtonian_relaxation is the heat flux resulting from the Newtonian relaxation of the sea surface temperature. In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. [CF-Standard Name]; unit: W m-2

Attribute description
snowfall_flux
Descriptor

In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. [CF-Standard Name]; unit: kg m-2 s-1

File identifier
wdc-climate.de:3952968 XML
Metadata language

eng; USA

Hierarchy level
collection
Hierarchy level name

VIKING20XJRAshort

Date stamp
2022-11-24T15:06:03
Metadata standard name

ISO 19115

Metadata standard version

ISO 19115-2:2009

Point of contact
  GEOMAR Helmholtz Centre for Ocean Research Kiel - Dr. Klaus Getzlaff
https://www.geomar.de/en/idrz/digital-research-services
 
 

Overviews

Spatial extent

N
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E
W
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Keywords


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