ECCO V4r4b: Monthly Mean Sea Surface Height on LLC90 Grid, 1992-2018

1992-01-01 to 2018-01-01 monthly-averaged dynamic sea surface height and model sea level anomaly data on the native Lat-Lon-Cap 90 (LLC90) model grid. The National Aeronautics and Space Administration produced this dataset as part of the ECCO Version 4 Release 4b (V4r4b) ocean and sea-ice state estimate, which is a dynamically consistent reconstruction fit to multiple satellite and in-situ observations.

Use Cases

• Analyzing long-term sea-level rise trends based on the 26-year monthly time series.
• Validating ocean general circulation models using the dynamically consistent state estimate.
• Studying ocean eddy and current variability from the high-resolution LLC90 grid data.
• Assimilating historical sea surface height observations into climate reanalysis projects.

Strengths

• Covers a 26-year period from 1992 to 2018, providing a long climate record.
• Integrates multiple observational constraints including satellite altimetry, sea surface temperature, and in-situ profiles.
• Provides data on a native high-resolution 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.
• 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 reconstruction (state estimate) from the MIT general circulation model (MITgcm), fit 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 02:54:46.738656; freshness should be verified

Geography

Global ocean coverage on the 1-degree global configuration of the MITgcm.