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Description

The MYD16A3GF Version 6 data product was decommissioned on July 31, 2023. Users are encouraged to use the MYD16A3GF Version 6.1 data product.

The MYD16A3GF Version 6 Evapotranspiration/Latent Heat Flux (ET/LE) product is a year-end gap-filled yearly composite dataset produced at 500 meter (m) pixel resolution. The improved algorithm is based on the logic of the Penman-Monteith equation, which includes inputs of daily meteorological reanalysis data along with Moderate Resolution Imaging Spectroradiometer (MODIS) remotely sensed data products such as vegetation property dynamics, albedo, and land cover.

The MYD16A3GF will be generated at the end of each year when the entire yearly 8-day MYD15A2H is available. Hence, the gap-filled MYD16A3GF is the improved MYD16, which has cleaned the poor-quality inputs from 8-day Leaf Area Index and Fraction Photosynthetically Active Radiation (LAI/FPAR) based on the Quality Control (QC) label for every pixel. If any LAI/FPAR pixel did not meet the quality screening criteria, its value is determined through linear interpolation. However, users cannot get MYD16A3GF in near-real time because it will be generated only at the end of a given year.

Provided in the MYD16A3GF product are layers for composited ET, LE, Potential ET (PET), and Potential LE (PLE) along with a quality control layer. Two low resolution browse images, ET and LE, are also available for each MYD16A3GF granule.

The pixel values for the two Evapotranspiration layers (ET and PET) are the sum for all days within the defined year, and the pixel values for the two Latent Heat layers (LE and PLE) are the average of all days within the defined year.

Known Issues

Improvements/Changes from Previous Versions

  • Spatial resolution of Version 6 products has increased to nominal 500 m from nominal 1,000 m in Version 5.
  • Version 5 data products were previously distributed by the Numerical Terradynamic Simulation Group at the University of Montana. The Version 6 products are a continuation of this project.

Version Description

The MYD16A3GF Version 6 data product was decommissioned on July 31, 2023. Users are encouraged to use the MYD16A3GF Version 6.1 data product (https://doi.org/10.5067/MODIS/MYD16A3GF.061).

Product Summary

Platforms
Aqua
Instruments
MODIS
Spatial Extent
N: 90 S: -90 E: 180 W: -180
Spatial Resolution
500 Meters x 500 Meters
Geographic Region
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2002-07-04 to 2021-12-31
Temporal Resolution
1 Year
Data Partner
Land Processes Distributed Active Archive Center (LP DAAC)
MODIS Adaptive Processing System, Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/TISL/MODAPS)
Concept ID
C2763370684-LPCLOUD
Data State
DEPRECATED
Processing Level
4
Published
Updated
Science Keywords
Evapotranspiration,
Photosynthesis,
Primary Production,
Latent Heat Flux

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Running, S., Mu, Q., Zhao, M., & Moreno, A. (2019). MYD16A3GF MODIS/Aqua Net Evapotranspiration Gap-Filled Yearly L4 Global 500 m SIN Grid V006 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MYD16A3GF.006 Date Accessed: 2025-11-03

File Naming Convention

MYD16A3GF.A2003001.h10v06.006.2019322114453.hdf

The file name begins with the Product Short Name (MYD16A3GF) followed by the Julian Date of Acquisition formatted as AYYYYDDD (A2003001), the Tile Identifier which is horizontal tile and vertical tile provided as hXXvYY (h10v06), the Version of the data collection (006), the Julian Date and Time of Production designated as YYYYDDDHHMMSS (2019322114453), and the Data Format (hdf).

Documents

Publications Citing This Dataset

Filters
Title Year Author
Simulating future groundwater recharge in coastal and inland catchments Busico, G.
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Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
ET_500m Total Evapotranspiration kg/m²/year uint16 65529 65529 to 65500 0.1
ET_QC_500m Evapotranspiration Quality Assessment Percent uint8 249 249 to 100 N/A
LE_500m Average Latent Heat Flux J/m²/day int16 32761 32761 to 32700 10000
PET_500m Total Potential Evapotranspiration kg/m²/year uint16 65529 65529 to 65500 0.1
PLE_500m Average Potential Latent Heat Flux J/m²/day int16 32761 32761 to 32700 10000
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