GCOM-C melakukan pengamatan dan pengumpulan data global jangka panjang dan berkelanjutan untuk menjelaskan mekanisme di balik fluktuasi anggaran radiasi dan siklus karbon yang diperlukan untuk membuat proyeksi yang akurat mengenai kenaikan suhu di masa mendatang. Pada saat yang sama, dengan bekerja sama dengan lembaga penelitian yang memiliki model numerik iklim, hal ini berkontribusi pada pengurangan kesalahan dalam prediksi kenaikan suhu yang berasal dari model numerik iklim dan peningkatan akurasi prediksi berbagai perubahan lingkungan. SGLI yang dipasang di GCOM-C adalah sensor penerus
Global Imager (GLI) yang dipasang di ADEOS-II (MIDORI II) dan merupakan Imaging Radiometer yang
mengukur radiasi dari wilayah inframerah termal hingga ultraviolet dekat (380 nm-12 um) dalam 19
saluran. Pengamatan global sekali dalam kira-kira setiap dua hari dapat dilakukan di lintang tengah dekat Jepang dengan lebar pengamatan di permukaan lebih dari 1.000 km. Selain itu, SGLI memiliki resolusi tinggi dibandingkan sensor global serupa dan memiliki fungsi pengamatan terpolarisasi serta fungsi pengamatan multi-sudut.
Band
Ukuran Piksel 4638,3 meter
Band
Nama
Unit
Min
Maks
Ukuran Piksel
Deskripsi
CHLA_AVE
mg/m^3
0*
4.000*
meter
Konsentrasi pigmen hijau (klorofil-a) dalam fitoplankton di lapisan permukaan laut.
CHLA_QA_flag
meter
CHLA QA
Bitmask untuk CHLA_QA_flag
Bit 0-1: Jenis medan
0: air (fraksi daratan = 0%)
1: sebagian besar air (0% < fraksi daratan < 50%)
2: sebagian besar pesisir (50% < fraksi daratan < 100%)
3: daratan (fraksi daratan = 100%)
* perkiraan nilai min atau maks
Properti Gambar
Properti Gambar
Nama
Jenis
Deskripsi
ALGORITHM_VERSION
STRING
Versi algoritma
GRID_INTERVAL
STRING
Resolusi spasial
GRID_INTERVAL_UNIT
STRING
Unit GRID_INTERVAL
IMAGE_END_TIME
STRING
Waktu berakhir akuisisi gambar
IMAGE_START_TIME
STRING
Waktu mulai pengambilan gambar
PROCESSING_RESULT
STRING
Baik, Cukup, Buruk, NG
PROCESSING_UT
STRING
Waktu pemrosesan
PRODUCT_FILENAME
STRING
Nama file sumber
PRODUCT_VERSION
STRING
Versi produk
SATELLITE_DIRECTION
STRING
Arah orbit satelit
A: Data malam hari
D: Data siang hari
CHLA_AVE_OFFSET
STRING
Offset
CHLA_AVE_SLOPE
STRING
Kemiringan
Persyaratan Penggunaan
Persyaratan Penggunaan
Set data ini bebas digunakan tanpa batasan apa pun (termasuk penggunaan komersial). Siapa pun yang ingin memublikasikan hasil analisis atau produk data bernilai tambah harus memberikan atribusi yang tepat pada data G-Portal asli, misalnya: "Data PR oleh Japan Aerospace Exploration Agency". Untuk produk data bernilai tambah, tunjukkan atribusi data G-Portal asli, misalnya, "Data asli untuk produk data yang ditambahkan nilai ini disediakan oleh Japan Aerospace Exploration Agency."
Produk ini adalah konsentrasi pigmen fotosintetik (klorofil-a) dalam fitoplankton di lapisan permukaan laut. Untuk data setelah 28-11-2021, lihat set data V3. GCOM-C melakukan pengamatan dan pengumpulan data global yang berkelanjutan dan jangka panjang untuk menjelaskan mekanisme di balik fluktuasi anggaran radiasi dan siklus karbon yang diperlukan untuk membuat …
[null,null,[],[[["\u003cp\u003eThis dataset provides chlorophyll-a concentration data in the sea surface layer, collected by the GCOM-C satellite between January 1, 2018, and November 28, 2021.\u003c/p\u003e\n"],["\u003cp\u003eThe data is freely available for use, including commercial purposes, with proper attribution to JAXA.\u003c/p\u003e\n"],["\u003cp\u003eGCOM-C aims to understand fluctuations in radiation budget and carbon cycle for climate change projections.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset has a spatial resolution of 4638.3 meters and includes information on chlorophyll-a concentration and quality flags.\u003c/p\u003e\n"],["\u003cp\u003eUsers can access the data through Earth Engine using the provided code snippet and visualization parameters.\u003c/p\u003e\n"]]],["The dataset from the Global Change Observation Mission (GCOM) provides daily chlorophyll-a concentration data in the ocean's surface layer from 2018-01-01 to 2021-11-28. Data is collected by the SGLI sensor aboard GCOM-C, measuring radiation from near-ultraviolet to thermal infrared regions. Users can access this data via the Earth Engine snippet provided, which also filters data to be only from daytime. The dataset is free for any use with proper credit given to the Japan Aerospace Exploration Agency.\n"],null,["# GCOM-C/SGLI L3 Chlorophyll-a Concentration (V2)\n\nDataset Availability\n: 2018-01-01T00:00:00Z--2021-11-28T00:00:00Z\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\nFor data after 2021-11-28, see [the V3 dataset](/earth-engine/datasets/catalog/JAXA/GCOM-C/L3/LAND/CHLA/V3).\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. (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\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/V2')\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_V2) \n[GCOM-C/SGLI L3 Chlorophyll-a Concentration (V2)](/earth-engine/datasets/catalog/JAXA_GCOM-C_L3_OCEAN_CHLA_V2) \nThis product is the concentration of the photosynthetic pigment (chlorophyll-a) in phytoplankton in the sea surface layer. For data after 2021-11-28, see the V3 dataset. 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 ... \nJAXA/GCOM-C/L3/OCEAN/CHLA/V2, chla,chlorophyll-a,g-portal,gcom,gcom-c,jaxa,ocean,ocean-color,oceans \n2018-01-01T00:00:00Z/2021-11-28T00:00:00Z \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_V2)"]]
