MODIS Net Birincil Üretim (NPP) CONUS veri kümesi, NPP'yi CONUS için MODIS Yüzey Yansıtma Değeri'ni kullanarak tahmin eder. NPP, bir ekosistemdeki bitkiler tarafından yakalanan karbon miktarıdır. Bu miktarda, solunum nedeniyle oluşan kayıplar dikkate alınır. NPP, MODIS Yüzey Yansıtma, gridMET ve Ulusal Arazi Örtüsü Veritabanı ile MOD17 algoritması (bkz. MOD17 Kullanıcı Kılavuzu) kullanılarak hesaplanır.
Bantlar
Piksel Boyutu 250 metre
Bantlar
Ad
Birimler
Min.
Maks.
Ölçek
Piksel Boyutu
Açıklama
annualNPP
kg*C/m^2
0
65535
0,0001
metre
Yıllık net birincil üretim
QC
%
0
100
metre
Boşluk doldurulmuş NDVI değerlerinin yüzdesi.
Kullanım Şartları
Kullanım Şartları
Bu çalışma kamu alanında olup bilinen telif hakkı kısıtlamaları içermez. Kullanıcılar, bu veri kümesinin kullanılmasından kaynaklanan rapor ve yayınların oluşturulmasında kullanılan kaynağı uygun şekilde alıntılamalı ve verilerin elde edildiği tarihi belirtmelidir.
Alıntılar
Alıntılar:
Robinson, N.P., B.W. Allred, W.K. Smith, M.O. Jones, A. Moreno, T.A.
Erickson, D.E. Naugle ve S.W. Running. 2018. Landsat 30 m ve MODIS 250 m'den elde edilen, ABD'nin bitişik bölgelerindeki karasal birincil üretim. Remote Sensing in Ecology and Conservation.
doi:10.1002/rse2.74
MODIS Net Birincil Üretim (NPP) CONUS veri kümesi, CONUS için MODIS Yüzey Yansıtma'yı kullanarak NPP'yi tahmin eder. NPP, bir ekosistemdeki bitkiler tarafından solunum nedeniyle oluşan kayıplar hesaba katıldıktan sonra yakalanan karbon miktarıdır. NPP, MODIS Yüzey Yansıtma ile MOD17 algoritması (MOD17 Kullanıcı Kılavuzu'na bakın) kullanılarak hesaplanır.
[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)"]]
