ECCO V4r4: Monthly Ocean and Sea-Ice Freshwater Fluxes, 1992-2017

ECCO Version 4 Release 4 provides monthly-averaged ocean and sea-ice surface freshwater fluxes on a global 1-degree model grid. The dataset is a dynamically consistent state estimate from NASA, constrained by satellite and in-situ observations including altimetry, sea surface temperature, salinity, and ice concentration. It covers a 26-year period from January 1992 to January 2018.

Use Cases

• Modeling global ocean freshwater budgets based on the provided surface flux estimates.
• Analyzing long-term trends in sea-ice melt and formation based on the integrated sea-ice surface freshwater fluxes.
• Validating other climate reanalysis products against this observationally constrained state estimate.
• Studying the coupling between atmospheric freshwater inputs and ocean circulation on a monthly scale.

Strengths

• Integrates multiple observational constraints including satellite altimetry, sea surface temperature, salinity from Aquarius, and in-situ profiles.
• Covers a 26-year time span from 1992 to 2018, providing a multi-decadal climate record.
• Provides a dynamically and kinematically consistent reconstruction of ocean, sea-ice, and surface atmospheric states.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data is provided in specialized formats (BIN, ISO) which may require specific tools for access and processing.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

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

Time Range

1992-01-01 to 2018-01-01

Freshness

Last updated 2026-03-13 03:04:49.029122; freshness should be verified.

Geography

Global ocean on the native Lat-Lon-Cap 90 (LLC90) model grid.