ECCO V4r4: Monthly 3D Ocean Salinity Fluxes, 1992-2018

1992-01-01 to 2018-01-01 monthly-averaged three-dimensional ocean salinity fluxes on the LLC90 grid from the ECCO Version 4 Release 4 state estimate. The dataset is a dynamically consistent reconstruction produced by NASA, fitting a 1-degree MITgcm model to a wide array of satellite and in-situ observations. Observational constraints include satellite altimetry, sea surface temperature and salinity, ocean bottom pressure, sea ice concentration, and in-situ temperature/salinity profiles.

Use Cases

• Analyzing long-term trends in ocean salinity transport based on the monthly-averaged 3D flux data.
• Validating regional or global ocean circulation models against the ECCO state estimate's salinity fields.
• Studying the impact of satellite-derived sea surface salinity (Aquarius) on model-data synthesis.
• Investigating ocean-atmosphere interactions and freshwater fluxes within a dynamically consistent framework.

Strengths

• Covers a 26-year time period from 1992 to 2018, providing a long-term climate record.
• Integrates multiple observational sources including satellite altimeters, radiometers, gravimeters, and in-situ programs like Argo and GO-SHIP.
• Provides data on the native high-resolution LLC90 model grid, preserving the model's spatial structure.

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 freshness should be verified; the last update date is in the future (2026-03 13).

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Dynamically and kinematically consistent ocean/sea-ice state estimate (ECCO V4r4) produced by fitting a 1-degree MITgcm to observations in a least-squares sense.

Time Range

1992-01-01T12:00:00 to 2018-01-01T00:00:00

Freshness

Last updated 2026-03-13 03:04:03.323747

Geography

Global ocean coverage on the LLC90 grid.