ECCO V4r4: Monthly Ocean-Atmosphere Surface Variables on LLC90 Grid, 1992-2017

ECCO Version 4 Release 4 provides monthly-averaged surface temperature, humidity, winds, and pressure on a global 1-degree Lat-Lon-Cap 90 grid. This dynamically consistent ocean and sea-ice state estimate from NASA covers the period from 1992-01-01 to 2018-01-01. The reconstruction fits a model to observations from satellite altimeters, radiometers, gravimeters, and in-situ ocean sensors.

Use Cases

• Validating climate model outputs based on the described satellite and in-situ observational constraints.
• Analyzing long-term trends in surface humidity and pressure over the global oceans.
• Studying air-sea interaction processes using the co-located wind and temperature variables.
• Assimilating reanalysis data into regional climate models based on the global 1-degree LLC90 grid structure.

Strengths

• Covers a 26-year time series from 1992 to 2018, providing a long climate record.
• Integrates multiple observational sources including satellite altimetry, sea surface temperature, salinity, and in-situ profiles.
• Provides data on a native LLC90 model grid, ensuring dynamical consistency for the described state estimate.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data freshness should be verified as the last metadata update is listed far in the future (2026-03-13).
• File formats include non-standard data types like JPEG, BIN, ISO, HTML, and PDF, which may complicate direct analysis.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Dynamically and kinematically-consistent reconstruction (state estimate) from the MIT general circulation model fit to observations in a least-squares sense.

Time Range

1992-01-01 to 2018-01-01

Freshness

Last updated 2026-03-13 03:05:56.437242; freshness should be verified.

Geography

Global ocean