Leaf-Area Index & Fraction of Absorbed Photosynthetically Active Radiation
Overview
LAI is defined as the one-sided green leaf area per unit ground area in broadleaf canopies and as half the total needle surface area per unit ground area in coniferous canopies. FPAR is the fraction of photosynthetically active radiation (400-700 nm) absorbed by green vegetation. Both variables are used for calculating surface photosynthesis, evapotranspiration, and net primary production, which in turn are used to calculate terrestrial energy, carbon, water cycle processes, and biogeochemistry of vegetation. Algorithm refinements have improved quality of retrievals and consistency with field measurements over all biomes, with a focus on woody vegetation.
Product Information
- Ranga Myneni
- LAI - Stage 2, FPAR - Stage 1
- Product Home Page Link
- User Guide
- ATBD
- Validation
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DOI
- refer to individual product page (below) for the appropriate DOI , citation text, and file spec for that product
Product Details
| Product Name | Terra | Aqua | Combined Terra Aqua |
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| Leaf Area Index/FPAR 8-Day L4 Global 500m |
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| Leaf Area Index/FPAR 4-Day L4 Global 500m |
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