ECCO V4r4: Monthly Ocean Density and Pressure on LLC90 Grid, 1992-2017

26 years of monthly-averaged ocean density, stratification, and hydrostatic pressure data from 1992 to 2017. The ECCO Version 4 Release 4 state estimate is a dynamically consistent reconstruction produced by NASA, assimilating observations from satellite altimeters, radiometers, gravimeters, and in-situ instruments. This dataset is provided on the native Lat-Lon-Cap 90 (LLC90) grid of the MIT general circulation model.

Use Cases

• Analyzing long-term trends in ocean stratification based on monthly density profiles.
• Validating ocean general circulation models using hydrostatic pressure fields.
• Studying the ocean's role in climate by examining density variations assimilated from satellite and in-situ data.
• Investigating deep ocean circulation patterns using the three-dimensional, time-evolving state estimate.

Strengths

• Covers a 26-year period from 1992 to 2017, providing a long climate record.
• Assimilates multiple observational constraints including satellite altimetry, sea surface temperature, and in-situ profiles.
• Provides data on a high-resolution native model grid (LLC90) for direct model comparison.

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 as the last metadata update is dated 2026-03-13.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Dynamically and kinematically-consistent ocean state estimate produced by fitting a MITgcm model run to observations in a least-squares sense.

Time Range

1992-01-01 to 2018-01-01

Freshness

Last updated 2026-03-13 02:56:44.124135; data covers up to 2017.

Geography

Global ocean coverage on the LLC90 model grid.