The MOD16A2 V105 product provides information about
8-day global terrestrial evapotranspiration at 1km pixel resolution.
Evapotranspiration (ET) is the sum of evaporation and plant transpiration
from the Earth's surface to the atmosphere. With long-term ET
data, the effects of changes in climate, land use, and ecosystems
disturbances can be quantified.
The MOD16A2 product is produced by the Numerical Terradynamic Simulation
Group NTSG,
University of Montana (UMT) in conjunction with NASA Earth Observing
System. For more details about the algorithm used see the algorithm
theoretical basis document.
The period of coverage is 8 days with the exception of
the last period at the end of the year which is either 5 or 6 days.
ET/PET units are 0.1mm/5-day for December 27-31 of 2001, 2002,
2003, 2005, 2006, 2007, 2009, 2010, and 0.1mm/6-day for December
26-31 of 2000, 2004, 2008 (leap years).
** For some pixels in African
rainforest, the MODIS albedo data from MCD43B2/MCD43B3 have no
cloud-free data throughout an entire year. As a result, pixels
for that year in all data bands are masked out.
Bands
Pixel Size 1000 meters
Bands
Name
Units
Min
Max
Scale
Pixel Size
Description
ET
kg/m^2
-5*
453*
0.1
meters
Evapotranspiration, aggregated for period of coverage.
LE
J/m^2/day
-20*
1671*
10000
meters
Latent heat flux, averaged daily over the period of coverage.
PET
kg/m^2
-8*
793*
0.1
meters
Potential evapotranspiration, aggregated for period of coverage.
PLE
J/m^2/day
-40*
3174*
10000
meters
Potential Latent Heat Flux, averaged daily over the period ofcoverage.
ET_QC
meters
ET quality control.
Bitmask for ET_QC
Bit 0: MODLAND_QC bits
0: Good quality (main algorithm with or without saturation)
1: Other quality (back-up algorithm or fill values)
Bit 1: Sensor
0: Terra
1: Aqua
Bit 2: Dead detector
0: Detectors fine for up to 50% of channels 1, 2
1: Dead detectors caused >50% adjacent detector retrieval
Bits 3-4: Cloud state
0: Significant clouds NOT present (clear)
1: Significant clouds WERE present
2: Mixed cloud present on pixel
3: Cloud state not defined, assumed clear
Bits 5-7: SCF_QC (five level confidence score)
0: Main method used, best result possible (no saturation)
1: Main method used, good and very usable (with saturation)
2: Main method failed due to bad geometry, empirical algorithm used
3: Main method failed due to problems other than geometry, empirical algorithm used
4: Pixel not produced at all, value couldn't be retrieved
* estimated min or max value
Image Properties
Image Properties
Name
Type
Description
days_of_coverage
DOUBLE
Number of days covered by each image since the period
of coverage for the last asset of the year can be of varying
length
Terms of Use
Terms of Use
All NTSG data distributed through this site
has no restrictions on subsequent use, sale, or redistribution.
Citations
Citations:
Qiaozhen Mu, Maosheng Zhao, Steven W. Running and Numerical Terradynamic
Simulation Group (2014): MODIS Global Terrestrial Evapotranspiration
(ET) Product MOD16A2 Collection 5.
The MOD16A2 V105 product provides information about 8-day global terrestrial evapotranspiration at 1km pixel resolution. Evapotranspiration (ET) is the sum of evaporation and plant transpiration from the Earth's surface to the atmosphere. With long-term ET data, the effects of changes in climate, land use, and ecosystems disturbances can be quantified. …
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],[],[[["\u003cp\u003eMOD16A2 V105 provides 8-day global terrestrial evapotranspiration data at 1km resolution from 2000-01-01 to 2014-12-27.\u003c/p\u003e\n"],["\u003cp\u003eEvapotranspiration (ET) is the combined evaporation and plant transpiration from the Earth's surface, and this dataset allows for the quantification of changes in climate, land use, and ecosystem disturbances.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset includes bands for ET, latent heat flux, potential evapotranspiration, potential latent heat flux, and quality control.\u003c/p\u003e\n"],["\u003cp\u003eMOD16A2 V105 is produced by the Numerical Terradynamic Simulation Group (NTSG) at the University of Montana in conjunction with NASA.\u003c/p\u003e\n"],["\u003cp\u003eThe data is freely available for use, sale, and redistribution without restrictions.\u003c/p\u003e\n"]]],[],null,["Dataset Availability\n: 2000-01-01T00:00:00Z--2014-12-27T00:00:00Z\n\nDataset Provider\n:\n\n\n [Numerical Terradynamic Simulation Group, The University of Montana](https://www.ntsg.umt.edu/project/modis/mod16.php)\n\nCadence\n: 8 Days\n\nTags\n:\n[8-day](/earth-engine/datasets/tags/8-day) [evapotranspiration](/earth-engine/datasets/tags/evapotranspiration) [global](/earth-engine/datasets/tags/global) [mod16a2](/earth-engine/datasets/tags/mod16a2) [modis](/earth-engine/datasets/tags/modis) [water-vapor](/earth-engine/datasets/tags/water-vapor) \n\nDescription \nThe MOD16A2 V105 product provides information about\n8-day global terrestrial evapotranspiration at 1km pixel resolution.\nEvapotranspiration (ET) is the sum of evaporation and plant transpiration\nfrom the Earth's surface to the atmosphere. With long-term ET\ndata, the effects of changes in climate, land use, and ecosystems\ndisturbances can be quantified.\n\nThe MOD16A2 product is produced by the Numerical Terradynamic Simulation\nGroup [NTSG](https://www.ntsg.umt.edu/),\nUniversity of Montana (UMT) in conjunction with NASA Earth Observing\nSystem. For more details about the algorithm used see the [algorithm\ntheoretical basis document](https://scholarworks.umt.edu/cgi/viewcontent.cgi?article=1267&context=ntsg_pubs).\n\n- The period of coverage is 8 days with the exception of the last period at the end of the year which is either 5 or 6 days. ET/PET units are 0.1mm/5-day for December 27-31 of 2001, 2002, 2003, 2005, 2006, 2007, 2009, 2010, and 0.1mm/6-day for December 26-31 of 2000, 2004, 2008 (leap years).\n\n\\*\\* For some pixels in African\nrainforest, the MODIS albedo data from MCD43B2/MCD43B3 have no\ncloud-free data throughout an entire year. As a result, pixels\nfor that year in all data bands are masked out.\n\nBands\n\n\n**Pixel Size**\n\n1000 meters\n\n**Bands**\n\n| Name | Units | Min | Max | Scale | Description |\n|---------|------------|-------|--------|-------|------------------------------------------------------------------------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|\n| `ET` | kg/m\\^2 | -5\\* | 453\\* | 0.1 | Evapotranspiration, aggregated for period of coverage. |\n| `LE` | J/m\\^2/day | -20\\* | 1671\\* | 10000 | Latent heat flux, averaged daily over the period of coverage. |\n| `PET` | kg/m\\^2 | -8\\* | 793\\* | 0.1 | Potential evapotranspiration, aggregated for period of coverage. |\n| `PLE` | J/m\\^2/day | -40\\* | 3174\\* | 10000 | Potential Latent Heat Flux, averaged daily over the period ofcoverage. |\n| `ET_QC` | None | | | | ET quality control. |\n| Bitmask for ET_QC - Bit 0: MODLAND_QC bits - 0: Good quality (main algorithm with or without saturation) - 1: Other quality (back-up algorithm or fill values) - Bit 1: Sensor - 0: Terra - 1: Aqua - Bit 2: Dead detector - 0: Detectors fine for up to 50% of channels 1, 2 - 1: Dead detectors caused \\\u003e50% adjacent detector retrieval - Bits 3-4: Cloud state - 0: Significant clouds NOT present (clear) - 1: Significant clouds WERE present - 2: Mixed cloud present on pixel - 3: Cloud state not defined, assumed clear - Bits 5-7: SCF_QC (five level confidence score) - 0: Main method used, best result possible (no saturation) - 1: Main method used, good and very usable (with saturation) - 2: Main method failed due to bad geometry, empirical algorithm used - 3: Main method failed due to problems other than geometry, empirical algorithm used - 4: Pixel not produced at all, value couldn't be retrieved ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||\n\n\\* estimated min or max value\n\nImage Properties\n\n**Image Properties**\n\n| Name | Type | Description |\n|------------------|--------|---------------------------------------------------------------------------------------------------------------------------|\n| days_of_coverage | DOUBLE | Number of days covered by each image since the period of coverage for the last asset of the year can be of varying length |\n\nTerms of Use\n\n**Terms of Use**\n\nAll NTSG data distributed through this [site](http://files.ntsg.umt.edu/)\nhas no restrictions on subsequent use, sale, or redistribution.\n\nCitations \nCitations:\n\n- Qiaozhen Mu, Maosheng Zhao, Steven W. Running and Numerical Terradynamic\n Simulation Group (2014): MODIS Global Terrestrial Evapotranspiration\n (ET) Product MOD16A2 Collection 5.\n\nExplore with Earth Engine **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\nCode Editor (JavaScript) \n\n```javascript\nvar dataset = ee.ImageCollection('MODIS/NTSG/MOD16A2/105')\n .filter(ee.Filter.date('2014-04-01', '2014-06-01'));\nvar evapotranspiration = dataset.select('ET');\nvar evapotranspirationVis = {\n min: 0,\n max: 300,\n palette:\n ['a50000', 'ff4f1a', 'f1e342', 'c7ef1f', '05fff3', '1707ff', 'd90bff'],\n};\nMap.setCenter(6.746, 46.529, 2);\nMap.addLayer(evapotranspiration, evapotranspirationVis, 'Evapotranspiration');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/MODIS/MODIS_NTSG_MOD16A2_105) \n[MOD16A2: MODIS Global Terrestrial Evapotranspiration 8-Day Global 1km](/earth-engine/datasets/catalog/MODIS_NTSG_MOD16A2_105) \nThe MOD16A2 V105 product provides information about 8-day global terrestrial evapotranspiration at 1km pixel resolution. Evapotranspiration (ET) is the sum of evaporation and plant transpiration from the Earth's surface to the atmosphere. With long-term ET data, the effects of changes in climate, land use, and ecosystems disturbances can be quantified. ... \nMODIS/NTSG/MOD16A2/105, 8-day,evapotranspiration,global,mod16a2,modis,water-vapor \n2000-01-01T00:00:00Z/2014-12-27T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://www.ntsg.umt.edu/project/modis/mod16.php)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/MODIS_NTSG_MOD16A2_105)"]]
