Suomi NPP 7 Day Composite Green Vegetation Fraction, 3/16 to 3/22/2016 - click to enlarge
Vegetation Index
Team Lead: Marco Vargas
Product Description
- Spectral Vegetation Indices (VIs) are optical measures of vegetation canopy "greenness", a composite property of:
- Leaf chlorophyll
- Leaf area
- Canopy cover
- Canopy architecture
- VIs are widely used in studies involving vegetation dynamics:
- Land surface phenology
- Climate-vegetation interactions
- Vis can be used to produce estimates of:
- Leaf Area Index (LAI)
- Fraction of Photosynthetically Active Radiation (fPAR)
- Net Photosynthesis (PSN)
- Annual Net Primary Production (NPP)
- Green Vegetation Fraction (GVF)
Product and Data Access
The IDPS Vegetation Index EDR consists of three vegetation indices:
- Normalized Difference Vegetation Index (NDVITOA) from top-of-atmosphere (TOA) reflectances
- Enhanced Vegetation Index (EVITOC) from top of canopy (TOC) reflectances.
- Normalized Difference Vegetation Index (NDVITOC) from top of canopy (TOC) reflectances
Users
NWS/NCEP, USGS, USDA
Enterprise Algorithm Development
- Develop the Enterprise Algorithm for Vegetation Products to generate: TOA-NDVI, TOC-NDVI, GVF, EVI, EVI2, LAI, fPAR, PSN and NPP
- Global gridded products in Lat/Lon projection
- Spatial resolution: 1 km (0.009 degree)
- Temporal resolution: daily, weekly updated daily, bi-weekly updated daily
