AI-generated Key Takeaways
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This dataset provides the concentration of chlorophyll-a in the sea surface layer, which is a photosynthetic pigment found in phytoplankton.
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The data is collected daily by the GCOM-C satellite as part of a long-term and continuous global observation mission.
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The dataset is available from November 29, 2021, to October 14, 2025, with a latency of 3-4 days.
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The dataset is free to use without restrictions, and proper credit should be given to the Japan Aerospace Exploration Agency (JAXA) when publishing results or value-added data products.
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Earth Engine is a platform for analyzing and visualizing this dataset, available for free for research, education, and nonprofit use.
- Dataset Availability
- 2021-11-29T00:00:00Z–2025-11-14T00:00:00Z
- Dataset Provider
- Global Change Observation Mission (GCOM)
- Cadence
- 1 Day
- Tags
Description
This product is the concentration of the photosynthetic pigment (chlorophyll-a) in phytoplankton in the sea surface layer.
This is an ongoing dataset with a latency of 3-4 days.
GCOM-C conducts long-term and continuous global observation and data collection to elucidate the mechanism behind fluctuations in radiation budget and carbon cycle needed to make accurate projections regarding future temperature rise. At the same time, cooperating with research institutions having a climate numerical model, it contributes to reduction of errors in temperature rise prediction derived from the climate numerical model and improvement of accuracy of prediction of various environmental changes. SGLI mounted on GCOM-C is the succession sensor of the Global Imager (GLI) mounted on ADEOS-II (MIDORI II) and is the Imaging Radiometer which measures the radiation from near-ultraviolet to thermal infrared region (380 nm-12 um) in 19 channels. Global observation of once for approximately every two days is possible at mid-latitude near Japan by observation width at ground greater than 1,000 km. In addition, SGLI realizes high resolution than the similar global sensor and has a polarized observation function and a multi-angle observation function.
Bands
Pixel Size 4638.3 meters
Bands
CHLA_AVE
Concentration of the green pigment (chlorophyll-a) in phytoplankton in sea surface layer.
CHLA_QA_flag
CHLA QA
Image Properties
Image Properties
Algorithm version
Spatial resolution
Unit of GRID_INTERVAL
Image acquisition end time
Image acquisition start time
Good, Fair, Poor, NG
Processing time
Source filename
Product version
Satellite orbit direction
- A: Nighttime data
- D: Daytime data
Offset
Slope
Terms of Use
Terms of Use
This dataset is free to use without any restrictions (including commercial use). Anyone wishing to publish analyzed results or value added data products should properly credit the original G-Portal data, e.g., "PR data by Japan Aerospace Exploration Agency". For value added data products, please indicate the credit of the original G-Portal data, e.g., "Original data for this value added data product was provided by Japan Aerospace Exploration Agency."
See G-Portal's terms of service (Article 7) for additional information.
Citations
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Murakami, H. (Jan. 2020). ATBD of GCOM-C chlorophyll-a concentration algorithm (Version 2). Retrieved from https://suzaku.eorc.jaxa.jp/GCOM_C/data/ATBD/ver2/V2ATBD_O3AB_Chla_Murakami.pdf
Explore with Earth Engine
Code Editor (JavaScript)
var dataset = ee . ImageCollection ( 'JAXA/GCOM-C/L3/OCEAN/CHLA/V3' ) . filterDate ( '2021-12-01' , '2022-01-01' ) // filter to daytime data only . filter ( ee . Filter . eq ( 'SATELLITE_DIRECTION' , 'D' )); // Multiply with slope coefficient var image = dataset . mean (). multiply ( 0.0016 ). log10 (); var vis = { bands : [ 'CHLA_AVE' ], min : - 2 , max : 2 , palette : [ '3500a8' , '0800ba' , '003fd6' , '00aca9' , '77f800' , 'ff8800' , 'b30000' , '920000' , '880000' ] }; Map . addLayer ( image , vis , 'Chlorophyll-a concentration' ); Map . setCenter ( 128.45 , 33.33 , 5 );
