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

Global ocean data provides daily-averaged density, stratification, and hydrostatic pressure on the native Lat-Lon-Cap 90 (LLC90) model grid. The ECCO Version 4 Release 4 state estimate is a dynamically consistent reconstruction from NASA, covering the period from 1992-01-01 to 2018-01-01. It assimilates observations from satellite altimeters, radiometers, gravimeters, and in-situ instruments like Argo floats.

Use Cases

• Modeling ocean circulation dynamics based on the three-dimensional, time-evolving ocean state.
• Analyzing climate variability based on the 26-year global reconstruction.
• Studying ocean stratification and mixing processes based on the provided density and stratification variables.
• Validating other ocean or climate models against the observationally constrained ECCO state estimate.

Strengths

• Covers a 26-year period from 1992 to 2018, providing a long-term climate record.
• Assimilates a wide array of observational constraints, including satellite altimetry, sea surface temperature, sea surface salinity, and in-situ profiles.
• Provides a dynamically and kinematically consistent reconstruction of the ocean, sea-ice, and surface atmospheric states.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data is provided on a specialized LLC90 model grid, which may require specific tools or expertise for analysis.
• Row count and file sizes are unknown, which may limit suitability assessment for some users.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Free-running solution of the MITgcm, fit to observations in a least-squares sense.

Time Range

1992-01-01 to 2018-01-01

Freshness

Last updated 2026-03-13 03:04:35.539688; freshness should be verified.

Geography

Global