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wdc-climate.de:3952968 eng; USA collection VIKING20XJRAshort Dr. Klaus Getzlaff GEOMAR Helmholtz Centre for Ocean Research Kiel https://www.geomar.de/en/idrz/digital-research-services pointOfContact 2022-11-24T15:06:03 ISO 19115 ISO 19115-2:2009 VIKING20X-JRA-short: daily to multi-decadal ocean dynamics under JRA55-do atmospheric forcing 2024-03-07 publication 1 VIKING20XJRAshort doi:10.26050/WDCC/VIKING20XJRAshort Dr. Klaus Getzlaff GEOMAR Helmholtz Centre for Ocean Research Kiel not filled Email: kgetzlaff@geomar.de principalInvestigator Dr. Klaus Getzlaff GEOMAR Helmholtz Centre for Ocean Research Kiel not filled Email: kgetzlaff@geomar.de author Dr. Franziska U. Schwarzkopf GEOMAR Helmholtz Centre for Ocean Research Kiel not filled Email: fschwarzkopf@geomar.de author WDC Climate at DKRZ publisher 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-17-1177-2021 Dr. Klaus Getzlaff GEOMAR Helmholtz Centre for Ocean Research Kiel https://www.geomar.de/en/idrz/digital-research-services pointOfContact NetCDF ATMOSPHERIC/OCEAN INDICATORS Atlantic Meridional Overturning Circulation NEMO3.6 OCEAN CURRENTS OCEAN UPWELLING RACE THERMOHALINE CIRCULATION VIKING20X model-output ocean simulation CC-BY-4.0: Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ eng; USA 0.0 360.0 -78.0 90.0 gregorian 1980-01-01 2019-12-31 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 not filled not filled; unit: W m-2 net_downward_shortwave_flux_at_sea_water_surface net_downward_shortwave_flux_at_sea_water_surface [CF-Standard Name]; unit: W m-2 sea_ice_x_velocity sea_ice_x_velocity [CF-Standard Name]; unit: m s-1 ocean_mixed_layer_thickness_defined_by_sigma_theta 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 sea_surface_temperature 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 cell_thickness Ocean Model Cell Thickness [CF-Standard Name]; unit: m not filled not filled; unit: W m-2 sea_water_potential_temperature sea_water_potential_temperature [CF-Standard Name]; unit: degC surface_downward_heat_flux_in_sea_water surface_downward_heat_flux_in_sea_water [CF-Standard Name]; unit: W m-2 sea_surface_height_above_geoid sea_surface_height_above_geoid [CF-Standard Name]; unit: m sea_ice_thickness sea_ice_thickness [CF-Standard Name]; unit: m not filled not filled; unit: m s-1 sea_ice_y_velocity sea_ice_y_velocity [CF-Standard Name]; unit: m s-1 wind_speed 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 not filled not filled; unit: 1 surface_snow_thickness surface_snow_thickness [CF-Standard Name]; unit: m surface_downward_x_stress surface_downward_x_stress [CF-Standard Name]; unit: N m-2 sea_water_x_velocity 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 water_flux_out_of_sea_water_due_to_newtonian_relaxation 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 sea_binary_mask [CF-Standard Name]; unit: 1 surface_downward_x_stress surface_downward_x_stress [CF-Standard Name]; unit: N m-2 ocean_mixed_layer_thickness_defined_by_sigma_theta 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 sea_water_practical_salinity 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 water_flux_out_of_sea_ice_and_sea_water "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 sea_ice_area_fraction sea_ice_area_fraction [CF-Standard Name]; unit: 1 surface_downward_y_stress surface_downward_y_stress [CF-Standard Name]; unit: N m-2 sea_water_y_velocity 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 net_downward_shortwave_flux_at_sea_water_surface net_downward_shortwave_flux_at_sea_water_surface [CF-Standard Name]; unit: W m-2 surface_temperature 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 sea_surface_salinity 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 surface_downward_y_stress surface_downward_y_stress [CF-Standard Name]; unit: N m-2 ocean_mixed_layer_thickness_defined_by_vertical_tracer_diffusivity 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 heat_flux_into_sea_water_due_to_newtonian_relaxation 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 snowfall_flux 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 NetCDF 28461295 https://www.wdc-climate.de/ui/entry?acronym=VIKING20XJRAshort information collection n/a None