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Use cases and Data sets

Use cases

The purpose of the use cases is to foster exchanges and collaborative work (datasets used, codes, best practices) and to share the different studies across the participating teams. Each use case is coordinated by a designated leader responsible for its scientific animation and coordination.

Topic Lead
Romain Ronan McAdam (CMCC)
MHW Chunxue Yang (CNR)
OHC Jiping Xie (NERSC)
Polar Region Gael Forget (MIT)
Ocean transport
MOC
Biomass/carbon Gregory Smith (ECCC)
Meso-scale/Eddies
Earth System Model
Surface Lagrangian
Sea Level Charikleia Oikonomou (HCMR)
Wave

 

Data sets

A non-exhaustive list of datasets contributing to this intercomparison is available here:

Name Ocean model Resolution General information
ECCO MITgcm Lat–Lon–Cap 90; grid spacing 22–110 km
  • Forcing field: ERA Interim
  • Assimilation method: 4D-Var
  • Assimilated data: SSH (ERS-1/2, TOPEX/Poseidon, GFO, ENVISAT, Jason-1/2/3, CryoSat-2, SARAL/AltiKa); SST (AVHRR); SSS (Aquarius); OBP (GRACE); sea ice; in situ (CTD, XBT, Argo)
  • Restoration data: _
  • Restoring time period: _ 

 
BRAN MOM5 0.1° × 0.1°
  • Forcing field: JRA-55
  • Assimilation method: Ensemble Optimal Interpolation
  • Assimilated data: SST (AVHRR, ATSR); SLA (RADS v4); in situ (CORA, Argo)
  • Restoration data: SSS (WOA13); T/S below 2,000 m
  • Restoring time period: 14 days (SSS); 365 days (T/S below 2,000 m)
SODA3 MOM5 0.25° × 0.25°
  • Forcing field: ERA Interim
  • Assimilation method: Optimum Interpolation
  • Assimilated data: Hydrographic data (World Ocean Database); SST (ICOADS); sea ice
  • Restoration data: _
  • Restoring time period: _ 
SODA4 MOM5.1/SIS1 0.1° × 0.1°
  • Forcing field: ERA5
  • Assimilation method: Optimum Interpolation
  • Assimilated data: Hydrographic data (World Ocean Database); SST (ICOADS); sea ice
  • Restoration data: _
  • Restoring time period: _ 
NCEP-GODAS MOM3 Zonal 1° × 1°; meridional 1/3°–1°
  • Forcing field:NCEP Reanalysis 2 (R2)
  • Assimilation method: 3D-Var
  • Assimilated data: SST (Reynolds et al., 2002); synthetic salinity; SSH (TOPEX/Jason-1); in situ (XBT, TAO, TRITON, PIRATA, Argo)
  • Restoration data: SST; SSS (annual climatology)
  • Restoring time period: 5 days (SST); 10 days (SSS)
GODAS-MOM4p1 MOM4p1 Zonal 1/2°; meridional 1/4°–1/2°
  • Forcing field:NCEP-R2; NCMRWF winds
  • Assimilation method: 3D-Var
  • Assimilated data: Temperature and salinity profiles (GTS); SST (OISST)
  • Restoration data: SSS (annual climatology)
  • Restoring time period: 30 days (SSS); 5 days (SST)
ORAS5 NEMO v3.4 ORCA1/4°
  • Forcing field: ERA-40; ERA-Interim; ECMWF NWP
  • Assimilation method: NEMOVAR (3D-Var FGAT)
  • Assimilated data: SST (HadISST2, OSTIA); T/S profiles (EN4); SLA (AVISO DT2014); sea ice concentration
  • Restoration data: SST (nudging); SSS (climatology)
  • Restoring time period: 12 days (SST); 1 year (SSS)
GLORYS NEMO 3.1 ORCA1/4°
  • Forcing field: ERA-Interim
  • Assimilation method: Reduced-order Kalman filter (SEEK); 3D-Var
  • Assimilated data: SST; SLA; in situ T/S (CORA); sea ice concentration
  • Restoration data: 3D restoring (EN4 products below 2,000 m)
  • Restoring time period: 20 years (below 2,000 m; poleward of 60°S)
C-GLORS NEMO 3.4 ORCA1/4°
  • Forcing field: ERA Interim
  • Assimilation method: OceanVar (3D-Var)
  • Assimilated data: Hydrographic profiles (EN3/EN4); along-track altimetry (AVISO)
  • Restoration data: Large-scale T/S (bias correction)
  • Restoring time period: 36 months
GloSea5 NEMO 0.25° × 0.25°
  • Forcing field: ERA-Interim
  • Assimilation method: NEMOVAR (3D-Var FGAT)
  • Assimilated data: SST; SLA; subsurface T/S profiles; sea ice concentration
  • Restoration data: Subsurface T/S
  • Restoring time period: 360 days (3D Newtonian damping)

Summary of ocean reanalysis systems, including ocean model configuration, resolution, forcing fields, data assimilation methods, assimilated observations, and restoring strategies.

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