Global Land Surface Phenology NASA VNP22Q2

The Suomi National Polar-Orbiting Partnership (Suomi NPP) NASA Visible Infrared Imaging Radiometer Suite (VIIRS) Land Cover Dynamics data product provides global land surface phenology (GLSP) metrics at yearly intervals. The VNP22Q2 data product is derived from time series of the two-band Enhanced Vegetation Index (EVI2) calculated from VIIRS Nadir Bidirectional Reflectance Distribution Function (BRDF)-Adjusted Reflectance (NBAR). Vegetation phenology metrics at 500 meter spatial resolution are identified for up to two detected growing cycles per year.

Provided in each VNP22Q2 product are 19 Science Dataset (SDS) layers. The product contains six phenological transition dates: onset of greenness increase, onset of greenness maximum, onset of greenness decrease, onset of greenness minimum, dates of mid-greenup, and senescence phases. The product also includes the growing season length. The greenness related metrics consist of EVI2 onset of greenness increase, EVI2 onset of greenness maximum, EVI2 growing season, rate of greenness increase and rate of greenness decrease. The confidence of phenology detection is provided as greenness agreement growing season, proportion of good quality (PGQ) growing season, PGQ onset greenness increase, PGQ onset greenness maximum, PGQ onset greenness decrease, and PGQ onset greenness minimum. The final layer is quality control specifying the overall quality of the product. A low-resolution browse image showing greenup is also available when viewing each VNP22Q2 granule.

Citation: Zhang, X., Friedl, M., Henebry, G. (2020). VIIRS/NPP Land Cover Dynamics Yearly L3 Global 500m SIN Grid V001 [Data set]. NASA EOSDIS Land Processes DAAC. Accessed 2022-03-03 from https://doi.org/10.5067/VIIRS/VNP22Q2.001

For more detail, such as the definition of parameters and growing cycles, please visit the website of the data provider: https://lpdaac.usgs.gov/products/vnp22q2v001/.

Data and Resources

Additional Info

Field Value
Last Updated March 7, 2022, 14:12 (UTC)
Created March 3, 2022, 10:36 (UTC)