Skip to main content

Description

The MOD17A2H Version 6.1 Gross Primary Productivity (GPP) product is a cumulative 8-day composite of values with 500 meter (m) pixel size based on the radiation use efficiency concept that can be potentially used as inputs to data models to calculate terrestrial energy, carbon, water cycle processes, and biogeochemistry of vegetation. The data product includes information about GPP and Net Photosynthesis (PSN). The PSN band values are the GPP less the Maintenance Respiration (MR). The data product also contains a PSN Quality Control (QC) layer. The quality layer contains quality information for both the GPP and the PSN.

Known Issues

Improvements/Changes from Previous Versions

  • The Version 6.1 Level-1B (L1B) products have been improved by undergoing various calibration changes that include: changes to the response-versus-scan angle (RVS) approach that affects reflectance bands for Aqua and Terra MODIS, corrections to adjust for the optical crosstalk in Terra MODIS infrared (IR) bands, and corrections to the Terra MODIS forward look-up table (LUT) update for the period 2012 - 2017.
  • A polarization correction has been applied to the L1B Reflective Solar Bands (RSB).
  • The product uses Climatology LAI/FPAR as back up to the operational LAI/FPAR.

Version Description

Collection Version 6.1 Processing and Reprocessing

Product Summary

Platforms
Terra
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
2021-01-01 to Present
Temporal Resolution
8 Day
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
C2565791027-LPCLOUD
Data State
ACTIVE
Processing Level
4
Published
Updated
Science Keywords
Photosynthesis,
Primary Production

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. (2021). MODIS/Terra Gross Primary Productivity 8-Day L4 Global 500m SIN Grid V061 [Data set]. NASA Land Processes Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MOD17A2H.061 Date Accessed: 2025-10-29

File Naming Convention

MOD17A2H.A2025209.h05v11.061.2025218043205.hdf

The file name begins with the Product Short Name (MOD17A2H) followed by the Julian Date of Acquisition formatted as AYYYYDDD (A2025209), the Tile Identifier which is horizontal tile and vertical tile provided as hXXvYY (h05v11), the Version of the data collection (061), the Julian Date and Time of Production designated as YYYYDDDHHMMSS (2025218043205), and the Data Format (hdf).

Documents

USER'S GUIDE

ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD)

PRODUCT QUALITY ASSESSMENT

SCIENCE DATA PRODUCT VALIDATION

GENERAL DOCUMENTATION

Publications Citing This Dataset

Filters
Title Year Author
Estimating mangrove forest gross primary production by quantifying environmental stressors in the coastal area Zheng, Y.
Retention of deposited ammonium and nitrate and its impact on the global forest carbon sink Gurmesa, G. A.
Spatiotemporal impact on vegetation by tunnel discharging in the Jinping II Hydropower Station—Evidence from the NDVI and GPP monitoring dataset of 2001–2019 Song, C.
Impacts of sub-grid topographic representations on surface energy balance and boundary conditions in the E3SM land model—A case study in Sierra Nevada Hao, D. L.
El Niño Southern Oscillation and enhanced arid land vegetation productivity in NW South America Vining, B. R.
The global carbon sink potential of terrestrial vegetation can be increased substantially by optimal land management Sha, Z. Y.
Vulnerability assessment and its driving forces in terms of NDVI and GPP over the Loess Plateau, China Zhang, X.
Remotely sensed carotenoid dynamics improve modelling photosynthetic phenology in conifer and deciduous forests Wong, C. Y. S.
Increased interception induced by vegetation restoration counters ecosystem carbon and water exchange efficiency in China Shao, R.
Spatiotemporal variation in gross primary productivity and their responses to climate in the great lakes region of Sub-Saharan Africa during 2001–2020 Kayiranga, A.
SHOWING 10 OF 109

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
Gpp_500m Gross Primary Productivity kg C/m² int16 32761 32761 to 30000 0.0001
PsnNet_500m Net Photosynthesis kg C/m² int16 32761 32761 to 30000 0.0001
Psn_QC_500m Quality Control Indicators N/A uint8 255 255 to 254 N/A
You're viewing 3 of 3