L'ensemble de données MODIS Net Primary Production (NPP) CONUS estime la production primaire nette à l'aide de la réflectance de surface MODIS pour CONUS. La production primaire nette (PPN) correspond à la quantité de carbone capturée par les plantes d'un écosystème, après prise en compte des pertes dues à la respiration. La production primaire nette est calculée 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
annualNPP
kg*C/m^2
0
65535
0,0001
mètres
Productivité primaire nette annuelle
QC
%
0
100
mètres
Pourcentage des valeurs NDVI comblées.
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 Net Primary Production (NPP) CONUS estime la production primaire nette à l'aide de la réflectance de surface MODIS pour CONUS. La production primaire nette correspond à la quantité de carbone capturée par les plantes d'un écosystème, après déduction des pertes dues à la respiration. La NPP est calculée à l'aide de l'algorithme MOD17 (voir le guide de l'utilisateur MOD17) avec la réflectance de surface MODIS, …
[null,null,[],[[["\u003cp\u003eThe MODIS Net Primary Production (NPP) CONUS dataset estimates the net amount of carbon captured by plants in the CONUS region, accounting for respiration losses.\u003c/p\u003e\n"],["\u003cp\u003eIt utilizes the MOD17 algorithm, MODIS Surface Reflectance, gridMET, and the National Land Cover Database for its calculations.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset, provided by the University of Montana NTSG, covers the period from 2001 to 2019 at a 250-meter resolution.\u003c/p\u003e\n"],["\u003cp\u003eNPP values are expressed in kilograms of carbon per square meter and include a quality control band indicating the percentage of gap-filled NDVI values.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset is in the public domain and is free to use, with proper citation encouraged.\u003c/p\u003e\n"]]],[],null,["# MODIS Net Primary Production CONUS\n\nDataset Availability\n: 2001-01-01T00:00:00Z--2019-01-01T00:00:00Z\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: 1 Year\n\nTags\n:\n[conus](/earth-engine/datasets/tags/conus) [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) [npp](/earth-engine/datasets/tags/npp) [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) [yearly](/earth-engine/datasets/tags/yearly) \n\n#### Description\n\nThe MODIS Net Primary Production (NPP) CONUS dataset estimates NPP using\nMODIS Surface Reflectance for CONUS. NPP is the amount of\ncarbon captured by plants in an ecosystem, after accounting for losses due to\nrespiration. NPP is calculated using the MOD17 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| `annualNPP` | kg\\*C/m\\^2 | 0 | 65535 | 0.0001 | meters | Annual net primary productivity |\n| `QC` | % | 0 | 100 | | meters | Percentage of gap-filled NDVI values. |\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/NPP')\n .filter(ee.Filter.date('2016-01-01', '2016-12-31'));\nvar npp = dataset.select('annualNPP');\nvar nppVis = {\n min: 0.0,\n max: 20000.0,\n palette: ['bbe029', '0a9501', '074b03'],\n};\nMap.setCenter(-98.26, 39.32, 5);\nMap.addLayer(npp, nppVis, 'NPP');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/UMT/UMT_NTSG_v2_MODIS_NPP) \n[MODIS Net Primary Production CONUS](/earth-engine/datasets/catalog/UMT_NTSG_v2_MODIS_NPP) \nThe MODIS Net Primary Production (NPP) CONUS dataset estimates NPP using MODIS Surface Reflectance for CONUS. NPP is the amount of carbon captured by plants in an ecosystem, after accounting for losses due to respiration. NPP is calculated using the MOD17 algorithm (see MOD17 User Guide) with MODIS Surface Reflectance, ... \nUMT/NTSG/v2/MODIS/NPP, conus,gridmet-derived,mod09q1,mod17,modis,nlcd-derived,npp,photosynthesis,plant-productivity,production,productivity,yearly \n2001-01-01T00:00:00Z/2019-01-01T00:00:00Z \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_NPP)"]]
