ECCO V4r4: Daily Ocean Temperature Fluxes on LLC90 Grid, 1992-2017

ECCO Version 4 Release 4 provides daily-averaged three-dimensional potential temperature fluxes on the LLC90 model grid. This NASA state estimate is a dynamically consistent reconstruction of ocean and sea-ice states from 1992 to 2017. The model is constrained by observations from satellite altimeters, radiometers, gravimeters, and in-situ programs like Argo and GO-SHIP.

Use Cases

• Modeling global ocean heat budget changes based on three-dimensional potential temperature fluxes.
• Validating climate model outputs against the observationally constrained ECCO state estimate.
• Analyzing long-term trends in ocean heat content and transport based on the 26-year temporal coverage.
• Studying ocean-atmosphere interactions using the consistent reconstructions of surface atmospheric states.

Strengths

• Covers a 26-year period from 1992-01-01 to 2018-01-01.
• Integrates multiple observational constraints including satellite altimetry, sea surface temperature, and in-situ profiles.
• Provides data on a high-resolution native model grid (Lat-Lon-Cap 90).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data freshness should be verified; the last update is listed as 2026-03-13, which is a future date.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Dynamically and kinematically consistent reconstruction (state estimate) from the 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 03:03:58.326177

Geography

Global ocean