ECCO V4r4: Monthly Ocean Velocity on LLC90 Grid, 1992-2018

Global monthly-averaged ocean velocity data on the native Lat-Lon-Cap 90 (LLC90) model grid. The dataset is a dynamically consistent state estimate from the ECCO V4r4 project, produced by NASA, covering the period from 1992-01-01 to 2018-01-01. It assimilates observations from satellite altimeters, radiometers, gravimeters, and in-situ oceanographic instruments.

Use Cases

• Modeling global ocean heat transport based on the three-dimensional velocity reconstructions.
• Analyzing long-term trends in ocean currents based on the 26-year monthly time series.
• Validating ocean general circulation models against the observationally constrained ECCO state estimate.
• Studying ocean-atmosphere interactions using the consistent surface state reconstructions.

Strengths

• Covers a 26-year period from 1992 to 2018, providing a long-term climate record.
• Assimilates multiple observational constraints including satellite altimetry, sea surface temperature, and in-situ profiles.
• Provides data on a native high-resolution model grid (LLC90) for dynamical consistency.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data freshness should be verified as the last update date is listed as 2026-03 13.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Dynamically and kinematically-consistent reconstruction from the MITgcm model, 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 02:55:48.721628; freshness should be verified.

Geography

Global