Este producto representa la concentración del pigmento fotosintético (clorofila-a) en el fitoplancton de la capa superficial del mar.
Este es un conjunto de datos continuo con una latencia de 3 a 4 días.
El GCOM-C realiza observaciones y recopila datos globales de forma continua y a largo plazo para dilucidar el mecanismo detrás de las fluctuaciones en el presupuesto de radiación y el ciclo del carbono necesarios para hacer proyecciones precisas sobre el aumento futuro de la temperatura. Al mismo tiempo, la cooperación con instituciones de investigación que tienen un modelo numérico climático contribuye a reducir los errores en la predicción del aumento de temperatura derivado del modelo numérico climático y a mejorar la precisión de la predicción de diversos cambios ambientales. El SGLI instalado en el GCOM-C es el sensor sucesor del Global Imager (GLI) instalado en el ADEOS-II (MIDORI II) y es el radiómetro de imágenes que mide la radiación desde la región del infrarrojo cercano al infrarrojo térmico (380 nm a 12 μm) en 19 canales. La observación global una vez cada dos días aproximadamente es posible en latitudes medias cerca de Japón con un ancho de observación en tierra superior a 1,000 km. Además, el SGLI ofrece una resolución más alta que el sensor global similar y tiene una función de observación polarizada y una función de observación multiángulo.
Bandas
Tamaño de los píxeles 4,638.3 metros
Bandas
Nombre
Unidades
Mín.
Máx.
Tamaño de los píxeles
Descripción
CHLA_AVE
mg/m³
0*
4,000*
metros
Concentración del pigmento verde (clorofila-a) en el fitoplancton de la capa superficial del mar.
CHLA_QA_flag
metros
CHLA QA
Máscara de bits para CHLA_QA_flag
Bits 0 y 1: Tipo de terreno
0: Agua (fracción de tierra = 0%)
1: Principalmente agua (0% < fracción de tierra < 50%)
2: Principalmente costera (50% < fracción de tierra < 100%)
3: Tierra (fracción de tierra = 100%)
* Valor mínimo o máximo estimado
Propiedades de imágenes
Propiedades de imágenes
Nombre
Tipo
Descripción
ALGORITHM_VERSION
STRING
Versión del algoritmo
GRID_INTERVAL
STRING
Resolución espacial
GRID_INTERVAL_UNIT
STRING
Unidad de GRID_INTERVAL
IMAGE_END_TIME
STRING
Hora de finalización de la adquisición de la imagen
IMAGE_START_TIME
STRING
Hora de inicio de la adquisición de la imagen
PROCESSING_RESULT
STRING
Good, Fair, Poor, NG
PROCESSING_UT
STRING
Tiempo de procesamiento
PRODUCT_FILENAME
STRING
Nombre del archivo fuente
PRODUCT_VERSION
STRING
Versión del producto
SATELLITE_DIRECTION
STRING
Dirección de la órbita satelital
A: Datos nocturnos
D: Datos diurnos
CHLA_AVE_OFFSET
STRING
Desplazamiento
CHLA_AVE_SLOPE
STRING
Pendiente
Condiciones de Uso
Condiciones de Uso
Este conjunto de datos se puede usar de forma gratuita sin restricciones (incluido el uso comercial). Cualquier persona que desee publicar resultados analizados o productos de datos de valor agregado debe atribuir correctamente los datos originales de G-Portal, p.ej., "Datos de PR de la Agencia Japonesa de Exploración Aeroespacial". En el caso de los productos de datos de valor agregado, indica el crédito de los datos originales de G-Portal, p.ej., "Los datos originales de este producto de datos con valor agregado fueron proporcionados por la Agencia Japonesa de Exploración Aeroespacial".
Este producto es la concentración del pigmento fotosintético (clorofila a) en el fitoplancton de la capa superficial del mar. Este es un conjunto de datos continuo con una latencia de 3 a 4 días. GCOM-C realiza observaciones y recopila datos globales de forma continua y a largo plazo para dilucidar el mecanismo detrás de las fluctuaciones en el presupuesto de radiación y el ciclo del carbono…
[null,null,[],[[["\u003cp\u003eThe JAXA/GCOM-C/L3/OCEAN/CHLA/V3 dataset provides global chlorophyll-a concentration data, indicating the amount of phytoplankton in the sea surface layer.\u003c/p\u003e\n"],["\u003cp\u003eData is collected by the GCOM-C satellite with the SGLI sensor, offering global coverage approximately every two days and high spatial resolution.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is freely available for use with attribution, including commercial purposes, and has a latency of 3-4 days.\u003c/p\u003e\n"],["\u003cp\u003eGCOM-C's mission focuses on understanding long-term changes in the radiation budget and carbon cycle to improve climate prediction accuracy.\u003c/p\u003e\n"],["\u003cp\u003eUsers can explore and analyze this dataset within Google Earth Engine using provided code snippets and visualizations.\u003c/p\u003e\n"]]],["The Global Change Observation Mission (GCOM) provides a dataset (2021-11-29 to 2025-02-20) on chlorophyll-a concentration in phytoplankton at the ocean's surface, collected daily. The data, captured by the SGLI sensor on GCOM-C, is used to study the radiation budget and carbon cycle. The dataset includes the concentration, quality flags, and metadata. Data is accessible via Earth Engine, with free use allowed, and requires proper citation to the Japan Aerospace Exploration Agency.\n"],null,["Dataset Availability\n: 2021-11-29T00:00:00Z--2025-08-29T00:00:00Z\n\nDataset Provider\n:\n\n\n [Global Change Observation Mission (GCOM)](https://suzaku.eorc.jaxa.jp/GCOM/index.html)\n\nCadence\n: 1 Day\n\nTags\n:\n[chla](/earth-engine/datasets/tags/chla) [chlorophyll-a](/earth-engine/datasets/tags/chlorophyll-a) [g-portal](/earth-engine/datasets/tags/g-portal) [gcom](/earth-engine/datasets/tags/gcom) [gcom-c](/earth-engine/datasets/tags/gcom-c) [jaxa](/earth-engine/datasets/tags/jaxa) [ocean](/earth-engine/datasets/tags/ocean) [ocean-color](/earth-engine/datasets/tags/ocean-color) [oceans](/earth-engine/datasets/tags/oceans) \n\nDescription \nThis product is the concentration of the photosynthetic pigment (chlorophyll-a) in phytoplankton\nin the sea surface layer.\n\nThis is an ongoing dataset with a latency of 3-4 days.\n\nGCOM-C conducts long-term and continuous global observation and data collection to elucidate the\nmechanism behind fluctuations in radiation budget and carbon cycle needed to make accurate\nprojections regarding future temperature rise. At the same time, cooperating with research\ninstitutions having a climate numerical model, it contributes to reduction of errors in\ntemperature rise prediction derived from the climate numerical model and improvement of accuracy\nof prediction of various environmental changes. SGLI mounted on GCOM-C is the succession sensor\nof the Global Imager (GLI) mounted on ADEOS-II (MIDORI II) and is the Imaging Radiometer which\nmeasures the radiation from near-ultraviolet to thermal infrared region (380 nm-12 um) in 19\nchannels. Global observation of once for approximately every two days is possible at\nmid-latitude near Japan by observation width at ground greater than 1,000 km. In addition, SGLI\nrealizes high resolution than the similar global sensor and has a polarized observation function\nand a multi-angle observation function.\n\nBands\n\n\n**Pixel Size**\n\n4638.3 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Pixel Size | Description |\n|----------------|---------|-----|--------|------------|-------------------------------------------------------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `CHLA_AVE` | mg/m\\^3 | 0\\* | 4000\\* | meters | Concentration of the green pigment (chlorophyll-a) in phytoplankton in sea surface layer. |\n| `CHLA_QA_flag` | | | | meters | CHLA QA |\n| Bitmask for CHLA_QA_flag - Bits 0-1: Terrain type - 0: water (land fraction = 0%) - 1: mostly water (0% \\\u003c land fraction \\\u003c 50%) - 2: mostly coastal (50% \\\u003c land fraction \\\u003c 100%) - 3: land (land fraction = 100%) ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n\n\\* estimated min or max value\n\nImage Properties\n\n**Image Properties**\n\n| Name | Type | Description |\n|---------------------|--------|-----------------------------------------------------------------|\n| ALGORITHM_VERSION | STRING | Algorithm version |\n| GRID_INTERVAL | STRING | Spatial resolution |\n| GRID_INTERVAL_UNIT | STRING | Unit of GRID_INTERVAL |\n| IMAGE_END_TIME | STRING | Image acquisition end time |\n| IMAGE_START_TIME | STRING | Image acquisition start time |\n| PROCESSING_RESULT | STRING | Good, Fair, Poor, NG |\n| PROCESSING_UT | STRING | Processing time |\n| PRODUCT_FILENAME | STRING | Source filename |\n| PRODUCT_VERSION | STRING | Product version |\n| SATELLITE_DIRECTION | STRING | Satellite orbit direction - A: Nighttime data - D: Daytime data |\n| CHLA_AVE_OFFSET | STRING | Offset |\n| CHLA_AVE_SLOPE | STRING | Slope |\n\nTerms of Use\n\n**Terms of Use**\n\nThis dataset is free to use without any restrictions (including commercial use). Anyone wishing\nto publish analyzed results or value added data products should properly credit the original\nG-Portal data, e.g., \"PR data by Japan Aerospace Exploration Agency\". For value added data\nproducts, please indicate the credit of the original G-Portal data, e.g., \"Original data for\nthis value added data product was provided by Japan Aerospace Exploration Agency.\"\n\nSee [G-Portal's terms of service (Article 7)](https://gportal.jaxa.jp/gpr/index/eula?lang=en)\nfor additional information.\n\nCitations \nCitations:\n\n- Murakami, H. (Jan. 2020). ATBD of GCOM-C chlorophyll-a concentration algorithm (Version 2).\n Retrieved from \u003chttps://suzaku.eorc.jaxa.jp/GCOM_C/data/ATBD/ver2/V2ATBD_O3AB_Chla_Murakami.pdf\u003e\n\nExplore with Earth Engine **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)\n\nCode Editor (JavaScript) \n\n```javascript\nvar dataset = ee.ImageCollection('JAXA/GCOM-C/L3/OCEAN/CHLA/V3')\n .filterDate('2021-12-01', '2022-01-01')\n // filter to daytime data only\n .filter(ee.Filter.eq('SATELLITE_DIRECTION', 'D'));\n\n// Multiply with slope coefficient\nvar image = dataset.mean().multiply(0.0016).log10();\n\nvar vis = {\n bands: ['CHLA_AVE'],\n min: -2,\n max: 2,\n palette: [\n '3500a8','0800ba','003fd6',\n '00aca9','77f800','ff8800',\n 'b30000','920000','880000'\n ]\n};\n\nMap.addLayer(image, vis, 'Chlorophyll-a concentration');\n\nMap.setCenter(128.45, 33.33, 5);\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/JAXA/JAXA_GCOM-C_L3_OCEAN_CHLA_V3) \n[GCOM-C/SGLI L3 Chlorophyll-a Concentration (V3)](/earth-engine/datasets/catalog/JAXA_GCOM-C_L3_OCEAN_CHLA_V3) \nThis 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 ... \nJAXA/GCOM-C/L3/OCEAN/CHLA/V3, chla,chlorophyll-a,g-portal,gcom,gcom-c,jaxa,ocean,ocean-color,oceans \n2021-11-29T00:00:00Z/2025-08-29T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://suzaku.eorc.jaxa.jp/GCOM/index.html)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/JAXA_GCOM-C_L3_OCEAN_CHLA_V3)"]]
