ECCO V4r4: Daily Ocean Momentum Tendency on LLC90 Grid, 1992-2017

ECCO Version 4 Release 4 provides a daily-averaged, three-dimensional ocean momentum tendency dataset on the native LLC90 grid. NASA's state estimate is a dynamically consistent reconstruction of ocean and sea-ice states, fit to observations from multiple satellite and in-situ programs. The data covers the period from 1992-01-01 to 2018-01-01.

Use Cases

• Analyzing ocean circulation dynamics based on three-dimensional momentum tendency fields.
• Validating or initializing global ocean models based on the dynamically consistent ECCO state estimate.
• Studying climate variability based on the 26-year time series of daily ocean state reconstructions.
• Assimilating observational data from satellites and in-situ sensors into oceanographic research.

Strengths

• Integrates multiple observational constraints, including satellite altimetry, SST, SSS, OBP, sea ice concentration, and in-situ temperature/salinity profiles.
• Covers a 26-year period from 1992 to 2018, providing a long-term climate record.
• Provides a dynamically and kinematically consistent reconstruction of the full 3D ocean state.

Limitations

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

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 02:56:16.759002; freshness should be verified.

Geography

Global ocean coverage on the LLC90 model grid.