ECCO V4r4: Monthly Sea-Ice and Snow Concentration and Thickness, 1992-2017

ECCO Version 4 Release 4 provides a 26-year reconstruction of global ocean and sea-ice states from 1992 to 2017. The dataset combines a 1-degree global MITgcm model with observations from satellite altimeters, radiometers, gravimeters, and in-situ sensors. NASA produced this monthly-averaged, 0.5-degree gridded product of sea-ice and snow concentration and thickness.

Use Cases

• Modeling sea-ice thickness trends based on the gridded concentration and thickness fields.
• Analyzing snow cover on sea ice based on the included snow concentration variable.
• Validating climate model outputs against the dynamically consistent ocean and sea-ice state estimate.
• Studying polar climate variability from 1992 to 2017 using the long-term monthly time series.

Strengths

• Integrates multiple observational constraints including satellite altimetry, sea surface temperature, and in-situ profiles.
• Covers a 26-year period from 1992-01-01 to 2018-01-01.
• Provides a dynamically and kinematically consistent reconstruction of ocean and sea-ice states.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data freshness should be verified as the last metadata update is dated 2026-03 13.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Free-running solution of the MITgcm fit to observations in a least-squares sense.

Time Range

1992-01-01 to 2018-01-01

Freshness

Last updated 2026-03-13 03:03:14.735198; freshness should be verified

Geography

Global, interpolated to a 0.5-degree grid