![COPERNICUS/MARINE/OC_GLO_BGC/REFLECTANCE_MULTI_4KM](https://developers.google.com/earth-engine/datasets/images/COPERNICUS/COPERNICUS_MARINE_OC_GLO_BGC_REFLECTANCE_MULTI_4KM_sample.png) Dataset Availability : 2025-03-01T00:00:00Z--2026-10-01T00:00:00Z Dataset Producer : [Copernicus](https://doi.org/10.48670/moi-00279) Cadence : 1 Month Tags : [copernicus](https://developers.google.com/earth-engine/datasets/tags/copernicus.md.txt) [oceans](https://developers.google.com/earth-engine/datasets/tags/oceans.md.txt) #### 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: - [User's Guide](https://documentation.marine.copernicus.eu/PUM/CMEMS-OC-PUM.pdf) - [Quality Information Document](https://documentation.marine.copernicus.eu/QUID/CMEMS-OC-QUID-009-101to104-111-113-116-118.pdf) - [Copernicus Marine Datastore](https://data.marine.copernicus.eu/products) NOTE: The provider may remove Copernicus Marine data (especially Near Real-Time, NRT, observations) from their repository after some time, possibly aggregating that data into different (e.g., monthly) products. However, the corresponding assets remain available in the Earth Engine collection. ### Bands **Bands** Pixel size: 4638.3 meters (all bands) | Name | Units | Pixel Size | Description | |---|---|---|---| | `RRS412` | sr\^-1 | 4638.3 meters | Remote Sensing Reflectance at 412 nm | | `RRS412_uncertainty` | % | 4638.3 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 | 4638.3 meters | Remote Sensing Reflectance at 443 nm | | `RRS443_uncertainty` | % | 4638.3 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 | 4638.3 meters | Remote Sensing Reflectance at 490 nm | | `RRS490_uncertainty` | % | 4638.3 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 | 4638.3 meters | Remote Sensing Reflectance at 555 nm | | `RRS555_uncertainty` | % | 4638.3 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 | 4638.3 meters | Remote Sensing Reflectance at 670 nm | | `RRS670_uncertainty` | % | 4638.3 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` | | 4638.3 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](https://marine.copernicus.eu/user-corner/service-commitments-and-licence) ### 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](https://doi.org/10.48670/moi-00279) ### Explore with Earth Engine > [!NOTE] > **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine) ### Code Editor (JavaScript) ```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](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/COPERNICUS/COPERNICUS_MARINE_OC_GLO_BGC_REFLECTANCE_MULTI_4KM) [Global Ocean Colour: Bio-Geo-Chemical, L4, from Satellite Observations, Reflectance, Multi-Sensor 4KM](https://developers.google.com/earth-engine/datasets/catalog/COPERNICUS_MARINE_OC_GLO_BGC_REFLECTANCE_MULTI_4KM.md.txt) 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,oceans 2025-03-01T00:00:00Z/2026-10-01T00:00:00Z -90 -180 90 180 Google Earth Engine https://developers.google.com/earth-engine/datasets - [](https://doi.org/https://doi.org/10.48670/moi-00279) - [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/COPERNICUS_MARINE_OC_GLO_BGC_REFLECTANCE_MULTI_4KM)