ECCO V4r4: Sea-Ice Velocity on LLC90 Grid, 1992-2017

ECCO Version 4 Release 4 provides a 26-year reconstruction of instantaneous sea-ice velocity on a specialized 1-degree global grid. This state estimate from NASA combines a free-running MIT general circulation model with constraints from multiple satellite and in-situ observations. The dataset covers the period from 1992-01-01 to 2018-01-01, offering a dynamically consistent view of ocean and sea-ice states.

Use Cases

• Modeling sea-ice transport and deformation based on the provided velocity fields.
• Validating other climate model outputs against this observationally constrained reanalysis.
• Analyzing long-term trends in polar ocean circulation from the 26-year time series.
• Studying the coupling between sea-ice motion and ocean states in a dynamically consistent framework.

Strengths

• Integrates observations from over 10 distinct satellite missions and in-situ programs.
• Covers a 26-year time period from 1992 to 2018.
• Provides a dynamically and kinematically consistent reconstruction of ocean and sea-ice states.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data is provided in multiple formats (JPEG, BIN, ISO, HTML, PDF), which may complicate direct analysis.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Dynamically consistent reconstruction from a free-running 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 03:02:56.201568; freshness should be verified.

Geography

Global, on a 1-degree Lat-Lon-Cap 90 (LLC90) model grid.