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

Daily-averaged ocean bottom pressure and anomaly data on the native Lat-Lon-Cap 90 grid from the ECCO Version 4 Release 4 ocean and sea-ice state estimate. The dataset is a dynamically consistent reconstruction produced by NASA, covering a 26-year period from 1992-01-01 to 2018-01-01. It assimilates observations from multiple satellite missions and in-situ programs including altimetry, gravimetry, and temperature/salinity profiles.

Use Cases

• Analyzing ocean mass variability and redistribution based on daily bottom pressure fields.
• Studying sea level change components by comparing model pressure anomalies with satellite observations.
• Validating ocean general circulation models using a dynamically consistent state estimate.
• Investigating climate signals like El Niño in ocean bottom pressure time series.
• Assimilating long-term, gridded pressure data into regional or higher-resolution models.

Strengths

• Covers a 26-year time range from 1992 to 2018, providing a long-term climate record.
• Assimilates multiple observational constraints including satellite altimetry, gravimetry (GRACE), and in-situ temperature/salinity profiles.
• Provides data on a native high-resolution model grid (LLC90), preserving numerical consistency.

Limitations

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

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Dynamically and kinematically consistent ocean state estimate produced by fitting a MITgcm model run 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 03:04:30.500825; freshness should be verified.

Geography

Global ocean coverage on the LLC90 model grid.