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

1992-01-01 to 2018-01-01 daily-averaged Gent-McWilliams ocean bolus velocity on the native Lat-Lon-Cap 90 (LLC90) model grid. This dataset is part of the ECCO Version 4 Release 4 (V4r4) ocean and sea-ice state estimate, a dynamically consistent reconstruction produced by NASA. The model solution is constrained by observations from satellite altimeters, radiometers, gravimeters, and in-situ ocean measurements.

Use Cases

• Modeling ocean eddy transport and parameterization based on the Gent-McWilliams bolus velocity field.
• Analyzing long-term ocean circulation trends from 1992 to 2018 using the daily time series.
• Validating or initializing other ocean or climate models using the dynamically consistent ECCO state estimate.
• Studying the interaction between ocean currents and sea ice using the coupled model reconstruction.

Strengths

• Covers a 26-year time period from 1992 to 2018, providing a long-term climate record.
• Integrates multiple observational constraints including satellite altimetry, sea surface temperature, and in-situ profiles.
• Provides a dynamically and kinematically consistent reconstruction of the ocean state.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data is provided in specialized formats (BIN, ISO) which may require specific tools for processing.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Free-running solution of 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 03:05:30.467038; freshness should be verified.

Geography

Global ocean on a 1-degree model grid.