ECCO V4r4: Daily Ocean Mixed Layer Depth on LLC90 Grid, 1992-2017

Global ocean data providing daily-averaged mixed layer depth on the native Lat-Lon-Cap 90 (LLC90) model grid. The ECCO Version 4 Release 4 state estimate is a dynamically consistent reconstruction of ocean and sea-ice states, constrained by satellite and in-situ observations. It covers the period from 1992-01-01 to 2018-01-01.

Use Cases

• Validating ocean mixed layer depth in climate models based on the ECCO state estimate framework.
• Analyzing temporal trends in ocean stratification based on the 26-year daily time series.
• Correlating mixed layer depth with sea surface temperature and salinity data from satellite constraints mentioned in the description.
• Studying ocean heat content and carbon uptake dynamics based on the three-dimensional, time-evolving reconstruction.

Strengths

• Covers a 26-year time range from 1992 to 2018.
• Integrates multiple observational constraints including satellite altimetry, radiometry, gravimetry, and in-situ profiles.
• Provides data on a native high-resolution model grid (LLC90).

Limitations

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

Provenance

Source

National Aeronautics and Space Administration

Collection Method

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

Time Range

1992-01-01 to 2018-01-01

Freshness

Last updated 2026-03-13 02:56:41.001374

Geography

Global ocean