ECCO V4r4: Daily 3D Ocean Salinity Fluxes on LLC90 Grid, 1992-2017

Daily-averaged three-dimensional ocean salinity fluxes on the native LLC90 grid from the ECCO Version 4 Release 4 state estimate. The dataset is a dynamically consistent reconstruction from the MITgcm, constrained by satellite and in-situ observations including altimetry, sea surface temperature, salinity, and ocean bottom pressure. It covers a 26-year period from 1992-01-01 to 2018-01-01.

Use Cases

• Analyzing global ocean salinity transport and freshwater fluxes based on the three-dimensional salinity flux data.
• Validating ocean general circulation models using the dynamically consistent, observationally constrained state estimate.
• Studying long-term trends in ocean salinity and their relation to climate based on the 26-year temporal coverage.
• Investigating sea ice concentration influences on salinity using the integrated sea-ice state reconstruction.

Strengths

• Covers a 26-year time series from 1992 to 2018, providing long-term climate context.
• Integrates multiple observational constraints including satellite altimetry, SST, SSS, OBP, and in-situ profiles.
• Provides data on a specialized high-resolution LLC90 grid native to the MITgcm model.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for specific ML tasks.
• Data may reflect temporal bias inherent to the availability of satellite missions within the 1992-2017 period.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Dynamically and kinematically consistent ocean/sea-ice/atmosphere state estimate from a free-running MITgcm solution fit to observations in a least-squares sense.

Time Range

1992-01-01 to 2018-01-01

Freshness

Last updated 2026-03-13 03:03:47.167857; freshness should be verified.

Geography

Global ocean