ECCO V4r4: Monthly Ocean Bottom Pressure on LLC90 Grid, 1992-2017

1992-01-01 to 2018-01-01 monthly-averaged ocean bottom pressure and pressure anomaly data on the native LLC90 grid from the ECCO Version 4 Release 4 ocean and sea-ice state estimate. The dataset is a dynamically consistent reconstruction produced by NASA, fitting a 1-degree global MITgcm model to multiple observational constraints including satellite altimetry, sea surface temperature, salinity, GRACE gravity data, and in-situ measurements.

Use Cases

• Analyzing long-term trends in deep ocean mass distribution based on monthly pressure anomalies.
• Validating or initializing ocean circulation models using the kinematically-consistent state estimate.
• Studying the relationship between ocean bottom pressure and satellite-derived gravity data from GRACE.
• Investigating ocean and sea-ice interactions using the coupled model reconstruction.

Strengths

• Covers a 26-year time period from 1992 to 2018.
• Integrates multiple observational data streams including satellite altimeters, radiometers, and in-situ programs.
• Provides data on the native high-resolution LLC90 model grid for consistency.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data freshness should be verified as the last metadata update is listed as 2026-03 13.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Dynamically and kinematically-consistent reconstruction (state estimate) fitting a MITgcm model to observations in a least-squares sense.

Time Range

1992-01-01 to 2018-01-01

Freshness

Last updated 2026-03-13 02:57:10.506772; freshness should be verified.

Geography

Global ocean coverage on a 1-degree model grid.