MOD16A2: MODIS Global Terrestrial Evapotranspiration 8-Day Global 1km

AI-generated Key Takeaways

• MOD16A2 V105 provides 8-day global terrestrial evapotranspiration data at 1km resolution from 2000-01-01 to 2014-12-27.

• Evapotranspiration (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.

• The dataset includes bands for ET, latent heat flux, potential evapotranspiration, potential latent heat flux, and quality control.

• MOD16A2 V105 is produced by the Numerical Terradynamic Simulation Group (NTSG) at the University of Montana in conjunction with NASA.

• The data is freely available for use, sale, and redistribution without restrictions.

Dataset Availability

2000-01-01T00:00:00Z–2014-12-27T00:00:00Z

Dataset Provider

Numerical Terradynamic Simulation Group, The University of Montana

Earth Engine Snippet

ee.ImageCollection("MODIS/NTSG/MOD16A2/105")

Cadence

8 Days

Tags

8-day evapotranspiration global mod16a2 modis water-vapor

Description

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.

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Code Editor (JavaScript)

var dataset = ee.ImageCollection('MODIS/NTSG/MOD16A2/105')
                  .filter(ee.Filter.date('2014-04-01', '2014-06-01'));
var evapotranspiration = dataset.select('ET');
var evapotranspirationVis = {
  min: 0,
  max: 300,
  palette:
      ['a50000', 'ff4f1a', 'f1e342', 'c7ef1f', '05fff3', '1707ff', 'd90bff'],
};
Map.setCenter(6.746, 46.529, 2);
Map.addLayer(evapotranspiration, evapotranspirationVis, 'Evapotranspiration');

Open in Code Editor

MOD16A2: MODIS Global Terrestrial Evapotranspiration 8-Day Global 1km

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. …

MODIS/NTSG/MOD16A2/105, 8-day,evapotranspiration,global,mod16a2,modis,water-vapor

2000-01-01T00:00:00Z/2014-12-27T00:00:00Z

-90 -180 90 180

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