Global Ocean Colour: Bio-Geo-Chemical, L4, from Satellite Observations, Reflectance, Multi-Sensor 4KM

  • The Global Ocean Colour (Copernicus-GlobColour) dataset is a Bio-Geo-Chemical (BGC) product developed by ACRI-ST, providing a comprehensive range of oceanographic variables derived from multiple satellite sources.

  • This dataset offers a global record of marine remote sensing reflectance as a high-quality L4 product with a 4 km spatial resolution, integrating data from multiple satellite sensors.

  • The dataset is available from 2023-04-01 to 2025-09-01 with a monthly cadence.

  • It is released under a Service Level Agreement with the E.U. Copernicus Marine Environment Monitoring Service (CMEMS).

  • The dataset includes several bands measuring Remote Sensing Reflectance (RRS) at various wavelengths and associated uncertainty, as well as a land-water mask.
COPERNICUS/MARINE/OC_GLO_BGC/REFLECTANCE_MULTI_4KM
Dataset Availability
2023-04-01T00:00:00Z–2025-10-01T00:00:00Z
Dataset Provider
Earth Engine Snippet
ee.ImageCollection("COPERNICUS/MARINE/OC_GLO_BGC/REFLECTANCE_MULTI_4KM")
Cadence
1 Month
Tags
copernicus marine oceans

Description

The Global Ocean Colour (Copernicus-GlobColour) dataset is a Bio-Geo-Chemical (BGC) product developed by ACRI-ST. Derived from multiple satellite sources like SeaWiFS, MODIS, and OLCI. It provides a comprehensive range of oceanographic variables, including: Chlorophyll (CHL), Phytoplankton Functional types and sizes (PFT), Primary Production (PP), Suspended Matter (SPM), Secchi Transparency Depth (ZSD), Diffuse Attenuation (KD490), Particulate Backscattering (BBP), Absorption Coefficient (CDM), Reflectance (RRS) and more.

This dataset provides a global record of marine remote sensing reflectance. This L4 product integrates data from multiple satellite sensors to provide a consistent and high-quality dataset with a 4 km spatial resolution. The marine reflectance data, which measures the light leaving the ocean surface at various wavelengths, is a fundamental ocean color parameter used to derive other biogeochemical properties like chlorophyll-a concentration and total suspended matter.

Documentation:

Bands

Pixel Size
4000 meters

Bands

Name Units Pixel Size Description
RRS412 sr^-1 meters

Remote Sensing Reflectance at 412 nm
RRS412_uncertainty % meters

Remote Sensing Reflectance at 412 nm - The uncertainty as measured in hundredths of a percent (e.g., a value of 5000 means 50%)..
RRS443 sr^-1 meters

Remote Sensing Reflectance at 443 nm
RRS443_uncertainty % meters

Remote Sensing Reflectance at 443 nm - The uncertainty as measured in hundredths of a percent (e.g., a value of 5000 means 50%).
RRS490 sr^-1 meters

Remote Sensing Reflectance at 490 nm
RRS490_uncertainty % meters

Remote Sensing Reflectance at 490 nm - The uncertainty as measured in hundredths of a percent (e.g., a value of 5000 means 50%).
RRS555 sr^-1 meters

Remote Sensing Reflectance at 555 nm
RRS555_uncertainty % meters

Remote Sensing Reflectance at 555 nm - The uncertainty as measured in hundredths of a percent (e.g., a value of 5000 means 50%).
RRS670 sr^-1 meters

Remote Sensing Reflectance at 670 nm
RRS670_uncertainty % meters

Remote Sensing Reflectance at 670 nm - The uncertainty as measured in hundredths of a percent (e.g., a value of 5000 means 50%).
flags meters

Land water mask bit.

  • 0: Water
  • 1: Land

Terms of Use

Terms of Use

This dataset is released for use under Service Level Agreement (SLA), using the acronym "CMEMS" or the shortened name "Copernicus Marine Service" both denote the E.U. Copernicus Marine Environment Monitoring Service. Highlights and key features of the licence are provided in this document License

Citations

Citations:

  • Copernicus Global Ocean Colour: Global Ocean Satellite Observations, ACRI-ST company (Sophia Antipolis, France) is providing Bio-Geo-Chemical (BGC) products based on the Copernicus-GlobColour processor. doi:10.48670/moi-00279

Explore with Earth Engine

Code Editor (JavaScript)

var dataset =
    ee.ImageCollection('COPERNICUS/MARINE/OC_GLO_BGC/REFLECTANCE_MULTI_4KM')
        .filter(ee.Filter.date('2025-03-01', '2025-06-01'));
var RRS = dataset.select('RRS412').mean();
var RRSVis = {
  min: 0.001,
  max: 0.018,
  palette:
      ['D7F9D0', '91CA85', '5AB05D', '129450', '0F7347', '195437', '122414'],
};
Map.setCenter(71, 52, 2);
Map.addLayer(RRS, RRSVis, 'Reflectance sensor');
Open in Code Editor
The Global Ocean Colour (Copernicus-GlobColour) dataset is a Bio-Geo-Chemical (BGC) product developed by ACRI-ST. Derived from multiple satellite sources like SeaWiFS, MODIS, and OLCI. It provides a comprehensive range of oceanographic variables, including: Chlorophyll (CHL), Phytoplankton Functional types and sizes (PFT), Primary Production (PP), Suspended Matter (SPM), Secchi Transparency Depth …
COPERNICUS/MARINE/OC_GLO_BGC/REFLECTANCE_MULTI_4KM, copernicus,marine,oceans
2023-04-01T00:00:00Z/2025-10-01T00:00:00Z
-90 -180 90 180
Google Earth Engine