- Dataset Availability
- 2021-11-29T00:00:00Z–2024-12-09T00:00:00Z
- Dataset Provider
- Global Change Observation Mission (GCOM)
- Earth Engine Snippet
-
ee.ImageCollection("JAXA/GCOM-C/L3/OCEAN/CHLA/V3")
- 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
Resolution
4638.3 meters
Bands
Name | Units | Min | Max | Description | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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CHLA_AVE |
mg/m^3 | 0* | 4000* | Concentration of the green pigment (chlorophyll-a) in phytoplankton in sea surface layer. |
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CHLA_QA_flag |
CHLA QA |
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Image Properties
Image Properties
Name | Type | Description |
---|---|---|
ALGORITHM_VERSION | STRING | Algorithm version |
GRID_INTERVAL | STRING | Spatial resolution |
GRID_INTERVAL_UNIT | STRING | Unit of GRID_INTERVAL |
IMAGE_END_TIME | STRING | Image acquisition end time |
IMAGE_START_TIME | STRING | Image acquisition start time |
PROCESSING_RESULT | STRING | Good, Fair, Poor, NG |
PROCESSING_UT | STRING | Processing time |
PRODUCT_FILENAME | STRING | Source filename |
PRODUCT_VERSION | STRING | Product version |
SATELLITE_DIRECTION | STRING | Satellite orbit direction
|
CHLA_AVE_OFFSET | STRING | Offset |
CHLA_AVE_SLOPE | STRING | 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
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);