GCOM-C/SGLI L3 Chlorophyll-a Concentration (V3)

Dataset Availability

2021-11-29T00:00:00Z–2024-11-16T00:00:00Z

Dataset Provider

Global Change Observation Mission (GCOM)

Earth Engine Snippet

ee.ImageCollection("JAXA/GCOM-C/L3/OCEAN/CHLA/V3")

Tags

chla chlorophyll-a climate g-portal gcom gcom-c jaxa ocean ocean-color

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
CHLA_AVE	mg/m^3	0*	4000*	Concentration of the green pigment (chlorophyll-a) in phytoplankton in sea surface layer.
CHLA_QA_flag				CHLA QA
Bitmask for CHLA_QA_flag Bits 0-1: Terrain type 0: water (land fraction = 0%) 1: mostly water (0% < land fraction < 50%) 2: mostly coastal (50% < land fraction < 100%) 3: land (land fraction = 100%)

* estimated min or max value

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 A: Nighttime data D: Daytime data
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

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

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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);

Open in Code Editor

GCOM-C/SGLI L3 Chlorophyll-a Concentration (V3)

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 …

JAXA/GCOM-C/L3/OCEAN/CHLA/V3, chla,chlorophyll-a,climate,g-portal,gcom,gcom-c,jaxa,ocean,ocean-color

2021-11-29T00:00:00Z/2024-11-16T00:00:00Z

Google Earth Engine

https://developers.google.com/earth-engine/datasets