O GCOM-C realiza observações e coleta de dados globais contínuas e de longo prazo para explicar o mecanismo por trás das flutuações no orçamento de radiação e no ciclo de carbono necessárias para fazer projeções precisas sobre o aumento futuro da temperatura. Ao mesmo tempo, a cooperação com instituições de pesquisa que têm um modelo numérico climático contribui para a redução de erros na previsão do aumento da temperatura derivada do modelo numérico climático e para a melhoria da acurácia da previsão de várias mudanças ambientais. O SGLI instalado no GCOM-C é o sensor sucessor do Global Imager (GLI) instalado no ADEOS-II (MIDORI II) e é o radiômetro de imagens que mede a radiação da região do infravermelho próximo ao ultravioleta térmico (380 nm a 12 um) em 19 canais. A observação global de uma vez a cada dois dias é possível em latitudes médias perto do Japão com uma largura de observação no solo maior que 1.000 km. Além disso, o SGLI tem uma resolução maior do que o sensor global semelhante e tem uma função de observação polarizada e multiângulo.
Bandas
Tamanho do pixel 4638,3 metros
Bandas
Nome
Unidades
Mín.
Máx.
Tamanho do pixel
Descrição
CHLA_AVE
mg/m³
0*
4.000*
metros
Concentração do pigmento verde (clorofila-a) no fitoplâncton na camada da superfície do mar.
CHLA_QA_flag
metros
CHLA QA
Máscara de bits para CHLA_QA_flag
Bits 0 a 1: tipo de terreno
0: água (fração de terra = 0%)
1: principalmente água (0% < fração de terra < 50%)
2: predominantemente costeira (50% < fração de terra < 100%)
3: terra (fração de terra = 100%)
* valor mínimo ou máximo estimado
Propriedades de imagens
Propriedades da imagem
Nome
Tipo
Descrição
ALGORITHM_VERSION
STRING
Versão do algoritmo
GRID_INTERVAL
STRING
Resolução espacial
GRID_INTERVAL_UNIT
STRING
Unidade de GRID_INTERVAL
IMAGE_END_TIME
STRING
Horário de término da aquisição de imagens
IMAGE_START_TIME
STRING
Horário de início da aquisição de imagens
PROCESSING_RESULT
STRING
Boa, Regular, Ruim, NG
PROCESSING_UT
STRING
Tempo de processamento
PRODUCT_FILENAME
STRING
Nome do arquivo de origem
PRODUCT_VERSION
STRING
Versão do produto
SATELLITE_DIRECTION
STRING
Direção da órbita do satélite
A: Dados noturnos
D: Dados diurnos
CHLA_AVE_OFFSET
STRING
Deslocamento
CHLA_AVE_SLOPE
STRING
Inclinação
Termos de Uso
Termos de Uso
O uso desse conjunto de dados é sem custo financeiro e sem restrições, incluindo para fins comerciais. Qualquer pessoa que queira publicar resultados analisados ou produtos de dados de valor agregado precisa dar o crédito adequado aos dados originais do G-Portal. Por exemplo: "Dados de relações públicas da Agência Japonesa de Exploração Aeroespacial". Para produtos de dados de valor agregado, indique o crédito dos dados originais do G-Portal, por exemplo: "Os dados originais deste produto de dados de valor agregado foram fornecidos pela Agência Japonesa de Exploração Aeroespacial."
Esse produto é a concentração do pigmento fotossintético (clorofila-a) em fitoplâncton na camada da superfície do mar. Uma versão mais recente JAXA/GCOM-C/L3/OCEAN/CHLA/V3 também está disponível para esse conjunto de dados, que usa esse algoritmo para processamento. O GCOM-C realiza observações e coleta de dados globais contínuas e de longo prazo para explicar o mecanismo por trás das flutuações em…
[null,null,[],[[["\u003cp\u003eThe JAXA/GCOM-C/L3/OCEAN/CHLA/V1 dataset provides chlorophyll-a concentration data in the sea surface layer, collected by the Global Change Observation Mission (GCOM) satellite.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset covers the period from January 1, 2018, to June 28, 2020, with a spatial resolution of 4638.3 meters.\u003c/p\u003e\n"],["\u003cp\u003eA newer version (V3) of this dataset is available with an updated processing algorithm.\u003c/p\u003e\n"],["\u003cp\u003eThe data is free to use with proper attribution to the Japan Aerospace Exploration Agency (JAXA).\u003c/p\u003e\n"],["\u003cp\u003eGCOM-C aims to understand fluctuations in radiation budget and carbon cycle for accurate climate projections.\u003c/p\u003e\n"]]],["The dataset from the Global Change Observation Mission (GCOM), provided by JAXA, offers daily chlorophyll-a concentration data in the ocean's surface layer from January 1, 2018, to June 28, 2020. Data is collected via the SGLI sensor, measuring radiation from near-ultraviolet to thermal infrared. Users can access this data via Earth Engine with provided code snippets, filter it by date and satellite direction and multiply it with the slope coefficient. The data is freely available for any use, with proper attribution.\n"],null,["# GCOM-C/SGLI L3 Chlorophyll-a Concentration (V1)\n\nDataset Availability\n: 2018-01-01T00:00:00Z--2020-06-28T00:00:00Z\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\n#### Description\n\nThis product is the concentration of the photosynthetic pigment (chlorophyll-a) in phytoplankton\nin the sea surface layer.\n\nA newer version [JAXA/GCOM-C/L3/OCEAN/CHLA/V3](/earth-engine/datasets/catalog/JAXA_GCOM-C_L3_OCEAN_CHLA_V3) is also available\nfor this dataset which uses this [algorithm](https://suzaku.eorc.jaxa.jp/GCOM_C/data/product_std.html)\nfor processing.\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\n### Bands\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\n### Image 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\n### Terms 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\n### Citations\n\nCitations:\n\n- Murakami, H. (Oct. 2018). ATBD of GCOM-C chlorophyll-a concentration algorithm (Version 1).\n Retrieved from \u003chttps://suzaku.eorc.jaxa.jp/GCOM_C/data/ATBD/ver1/SGLI_Chla_algorithm_v10.pdf\u003e\n\n### Explore with Earth Engine\n\n| **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\n### Code Editor (JavaScript)\n\n```javascript\nvar dataset = ee.ImageCollection('JAXA/GCOM-C/L3/OCEAN/CHLA/V1')\n .filterDate('2020-01-01', '2020-02-01')\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_V1) \n[GCOM-C/SGLI L3 Chlorophyll-a Concentration (V1)](/earth-engine/datasets/catalog/JAXA_GCOM-C_L3_OCEAN_CHLA_V1) \nThis product is the concentration of the photosynthetic pigment (chlorophyll-a) in phytoplankton in the sea surface layer. A newer version JAXA/GCOM-C/L3/OCEAN/CHLA/V3 is also available for this dataset which uses this algorithm for processing. GCOM-C conducts long-term and continuous global observation and data collection to elucidate the mechanism behind fluctuations in ... \nJAXA/GCOM-C/L3/OCEAN/CHLA/V1, chla,chlorophyll-a,g-portal,gcom,gcom-c,jaxa,ocean,ocean-color,oceans \n2018-01-01T00:00:00Z/2020-06-28T00:00:00Z \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_V1)"]]
