ECCO V4r4: Daily Ocean Velocity on a 0.5-Degree Grid, 1992-2017

Global daily-averaged ocean velocity data interpolated to a regular 0.5-degree 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 is constrained by multiple satellite and in-situ observations including sea surface height, temperature, salinity, and ice concentration.

Use Cases

• Modeling global ocean circulation patterns based on the 0.5-degree gridded velocity fields.
• Analyzing long-term climate trends based on the 26-year time series of ocean state estimates.
• Validating satellite-derived oceanographic data based on the assimilation of altimeter and radiometer observations.
• Studying ocean-atmosphere interactions based on the dynamically consistent reconstructions of surface states.

Strengths

• Covers a 26-year time series from 1992 to 2018.
• Assimilates data from over 10 distinct satellite missions and in-situ programs.
• Provides a dynamically and kinematically consistent reconstruction of the 3D ocean state.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data freshness should be verified; the last update date is 2026-03-13, but the data ends in 2018.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

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

Time Range

1992-01-01 to 2018-01-01

Freshness

Last updated 2026-03-13 03:03:51.620430; freshness should be verified.

Geography

Global