L'ensemble de données MODIS Gross Primary Production (GPP) CONUS estime la production primaire brute à l'aide de la réflectance de surface MODIS pour CONUS. La production primaire brute (PPB) correspond à la quantité de carbone capturée par les plantes dans un écosystème. Il s'agit d'un élément essentiel dans les calculs de la production primaire nette (PPN). Le GPP est calculé à l'aide de l'algorithme MOD17 (voir le guide de l'utilisateur MOD17) avec la réflectance de surface MODIS, gridMET et la base de données nationale sur la couverture des sols.
Bracelets
Taille des pixels 250 mètres
Bandes de fréquences
Nom
Unités
Min
Max
Échelle
Taille des pixels
Description
GPP
kg*C/m^2/8-day
0
65535
0,0001
mètres
Production primaire brute sur huit jours
QC
0
1
mètres
Indique si la valeur NDVI d'origine a été ajustée à l'aide de l'algorithme de lissage. 0 indique que la valeur n'a pas été ajustée. "1" indique que la valeur a été ajustée.
Conditions d'utilisation
Conditions d'utilisation
Cette œuvre appartient au domaine public et n'est soumise à aucune restriction connue en matière de droits d'auteur. Les utilisateurs doivent citer correctement la source utilisée pour créer des rapports et des publications à partir de cet ensemble de données, et indiquer la date à laquelle les données ont été acquises.
Citations
Citations :
Robinson, N.P., B.W. Allred, W.K. Smith, M.O. Jones, A. Moreno, T.A.
Erickson, D.E. Naugle, et S.W. Running. 2018. Production primaire terrestre pour les États-Unis contigus, dérivée de Landsat 30 m et MODIS 250 m. Remote Sensing in Ecology and Conservation.
doi:10.1002/rse2.74
L'ensemble de données MODIS Gross Primary Production (GPP) CONUS estime la production primaire brute à l'aide de la réflectance de surface MODIS pour CONUS. La production primaire brute (PPB) correspond à la quantité de carbone capturée par les plantes dans un écosystème. Il s'agit d'un élément essentiel dans les calculs de la production primaire nette (PPN). Le GPP est calculé à l'aide de l'algorithme MOD17 (voir MOD17…
[null,null,[],[[["\u003cp\u003eThe MODIS Gross Primary Production (GPP) CONUS dataset estimates the amount of carbon captured by plants using MODIS Surface Reflectance data for the conterminous United States.\u003c/p\u003e\n"],["\u003cp\u003eGPP is calculated using the MOD17 algorithm with inputs from MODIS Surface Reflectance, gridMET, and the National Land Cover Database.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset provides 8-day GPP estimates at 250-meter resolution from 2001 to 2021 and is freely available for use.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset includes a quality control band indicating whether the original NDVI value was adjusted during processing.\u003c/p\u003e\n"],["\u003cp\u003eUsers are encouraged to cite the provided source when using this dataset in reports or publications.\u003c/p\u003e\n"]]],["The MODIS GPP CONUS dataset, provided by the University of Montana NTSG, spans from 2001-01-01 to 2021-12-19 with an 8-day cadence. It estimates Gross Primary Production (GPP), or carbon captured by plants, using MODIS Surface Reflectance, gridMET, and the National Land Cover Database. Data is available via Google Earth Engine using an associated snippet, allowing for visualization and analysis of GPP at a 250-meter pixel size, it includes GPP and quality control bands.\n"],null,["# MODIS Gross Primary Production CONUS\n\nDataset Availability\n: 2001-01-01T00:00:00Z--2021-12-19T00:00:00Z\n\nDataset Provider\n:\n\n\n [University of Montana Numerical Terradynamic Simulation Group (NTSG)](https://www.ntsg.umt.edu/project/landsat/landsat-productivity.php)\n\nCadence\n: 8 Days\n\nTags\n:\n[8-day](/earth-engine/datasets/tags/8-day) [conus](/earth-engine/datasets/tags/conus) [gpp](/earth-engine/datasets/tags/gpp) [gridmet-derived](/earth-engine/datasets/tags/gridmet-derived) [mod09q1](/earth-engine/datasets/tags/mod09q1) [mod17](/earth-engine/datasets/tags/mod17) [modis](/earth-engine/datasets/tags/modis) [nlcd-derived](/earth-engine/datasets/tags/nlcd-derived) [photosynthesis](/earth-engine/datasets/tags/photosynthesis) [plant-productivity](/earth-engine/datasets/tags/plant-productivity) [production](/earth-engine/datasets/tags/production) [productivity](/earth-engine/datasets/tags/productivity) \n\n#### Description\n\nThe MODIS Gross Primary Production (GPP) CONUS dataset estimates GPP using\nMODIS Surface Reflectance for CONUS. GPP is the amount of\ncarbon captured by plants in an ecosystem and is an essential component in\nthe calculations of Net Primary Production (NPP). GPP is calculated using the\nMOD17 algorithm (see [MOD17 User\nGuide](https://www.ntsg.umt.edu/files/modis/MOD17UsersGuide2015_v3.pdf)) with\nMODIS Surface Reflectance, gridMET, and the National Land Cover Database.\n\n### Bands\n\n\n**Pixel Size**\n\n250 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Scale | Pixel Size | Description |\n|-------|------------------|-----|-------|--------|------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `GPP` | kg\\*C/m\\^2/8-day | 0 | 65535 | 0.0001 | meters | 8-day gross primary production |\n| `QC` | | 0 | 1 | | meters | Indicates if the original NDVI value was adjusted through the smoothing algorithm. 0 denotes the value was not adjusted. 1 indicates the value was adjusted. |\n\n### Terms of Use\n\n**Terms of Use**\n\nThis work is in the public domain and is free of known copyright\nrestrictions. Users should properly cite the source used in the creation of\nany reports and publications resulting from the use of this dataset and note\nthe date when the data was acquired.\n\n### Citations\n\nCitations:\n\n- Robinson, N.P., B.W. Allred, W.K. Smith, M.O. Jones, A. Moreno, T.A.\n Erickson, D.E. Naugle, and S.W. Running. 2018. Terrestrial primary\n production for the conterminous United States derived from Landsat 30 m and\n MODIS 250 m. Remote Sensing in Ecology and Conservation.\n [doi:10.1002/rse2.74](https://doi.org/10.1002/rse2.74)\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('UMT/NTSG/v2/MODIS/GPP')\n .filter(ee.Filter.date('2017-05-01', '2017-05-31'));\nvar gpp = dataset.select('GPP');\nvar gppVis = {\n min: 0.0,\n max: 1000.0,\n palette: ['bbe029', '0a9501', '074b03'],\n};\nMap.setCenter(-98.26, 39.32, 5);\nMap.addLayer(gpp, gppVis, 'GPP');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/UMT/UMT_NTSG_v2_MODIS_GPP) \n[MODIS Gross Primary Production CONUS](/earth-engine/datasets/catalog/UMT_NTSG_v2_MODIS_GPP) \nThe MODIS Gross Primary Production (GPP) CONUS dataset estimates GPP using MODIS Surface Reflectance for CONUS. GPP is the amount of carbon captured by plants in an ecosystem and is an essential component in the calculations of Net Primary Production (NPP). GPP is calculated using the MOD17 algorithm (see MOD17 ... \nUMT/NTSG/v2/MODIS/GPP, 8-day,conus,gpp,gridmet-derived,mod09q1,mod17,modis,nlcd-derived,photosynthesis,plant-productivity,production,productivity \n2001-01-01T00:00:00Z/2021-12-19T00:00:00Z \n24.42 -124.84 49.72 -64.82 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://www.ntsg.umt.edu/project/landsat/landsat-productivity.php)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/UMT_NTSG_v2_MODIS_GPP)"]]
