MOD17A3.055: Terra Net Primary Production Yearly Global 1km (MODIS/055/MOD17A3)

Version V055

The MOD17A3 V055 product provides information about
annual Gross and Net Primary Productivity (NPP) at 1km pixel resolution.
Net Primary Productivity (NPP) defines the rate at which all plants
in an ecosystem produce net useful chemical energy. In other words,
NPP is equal to the difference between the rate at which plants
in an ecosystem produce useful chemical energy (or GPP), and the
rate at which they expend some of that energy for respiration.

The version 055 of the NPP product is produced by the Numerical
Terradynamic Simulation Group (NTSG),
University of Montana (UMT). It corrects the problem with cloud-contaminated
MODIS LAI-FPAR inputs to the MOD17 algorithm. The original, uncorrected
datasets constitute the version 4 NPP products. For further details
regarding the differences between the NTSG and NASA versions of
this product, please consult this document

GppAnnual gross primary productivitykg*C/m^20.0001
NppAnnual net primary productivitykg*C/m^20.0001
Gpp_Npp_QCPercentage of filled MOD15 LAI caused by cloud-contamination during a growing season (defined when daily minimum air temperatures are above -8°) in a year. A high value indicates a high frequency of cloud-contamination. For example, QA is high for tropical rainforests but low in arid areas.%


NASA LP DAAC at the USGS EROS Center (producer, licensor)
Google Earth Engine (host)
STAC Version 0.6.2
Keywords global, gpp, mod17a3, modis, npp, photosynthesis, productivity, psn, terra, yearly
License proprietary
Temporal Extent 12/31/1999, 4:00:00 PM - now
Citation Please visit [LP DAAC 'Citing Our Data' page]( for information on citing LP DAAC datasets.
Type image_collection
GSD metersm
Platform Terra
Instrument MODIS
Cadence year
cube:dimensions {"x":{"type":"spatial","axis":"x","extent":[-180,180]},"y":{"type":"spatial","axis":"y","extent":[-90,90]},"temporal":{"type":"temporal","extent":["2000-01-01T00:00:00Z",null]},"bands":{"type":"bands","values":["Gpp","Npp","Gpp_Npp_QC"]}}