HYCOM: Hybrid Coordinate Ocean Model, Sea Surface Elevation

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Dataset Provider
Earth Engine Snippet
elevation hycom nopp ocean water


The Hybrid Coordinate Ocean Model (HYCOM) is a data-assimilative hybrid isopycnal-sigma-pressure (generalized) coordinate ocean model. The subset of HYCOM data hosted in EE contains the variables salinity, temperature, velocity, and elevation. They have been interpolated to a uniform 0.08 degree lat/long grid between 80.48°S and 80.48°N. The salinity, temperature, and velocity variables have been interpolated to 40 standard z-levels.

The HYCOM Consortium, which includes the National Ocean Partnership Program (NOPP), is part of the U.S. Global Ocean Data Assimilation Experiment (GODAE).

Funded by the National Ocean Partnership Program, the Office of Naval Research (ONR), and DoD High Performance Computing Modernization Program.

For more information, see:


8905.6 meters


Name Units Min Max Scale Description
surface_elevation m -5681* 5965* 0.001

Sea surface elevation anomaly relative to the modeled elevation mean

* estimated min or max value

Image Properties

Image Properties

Name Type Description
experiment STRING

Experiment number

Terms of Use

Terms of Use

This dataset is freely available with no restrictions.


  • J. A. Cummings and O. M. Smedstad. 2013: Variational Data Assimilation for the Global Ocean. Data Assimilation for Atmospheric, Oceanic and Hydrologic Applications vol II, chapter 13, 303-343.

Explore with Earth Engine

Code Editor (JavaScript)

var dataset = ee.ImageCollection('HYCOM/sea_surface_elevation')
                  .filter(ee.Filter.date('2018-08-01', '2018-08-15'));
var surfaceElevation = dataset.select('surface_elevation');
var surfaceElevationVis = {
  min: -2000.0,
  max: 2000.0,
  palette: ['blue', 'cyan', 'yellow', 'red'],
Map.setCenter(-28.1, 28.3, 1);
Map.addLayer(surfaceElevation, surfaceElevationVis, 'Surface Elevation');
Open in Code Editor