Global Vegetation Biophysical Parameters from FASIR NDVI, 1982-1998

FASIR-adjusted NDVI data provides a 17-year, monthly record of terrestrial photosynthetic activity from 1982 to 1998. This NASA-funded dataset includes derived biophysical parameters essential for modeling surface-atmosphere energy exchange. It is a core component of the International Satellite Land Surface Climatology Project (ISLSCP) Initiative II.

Use Cases

• Modeling global photosynthesis using the Fraction of Absorbed Photosynthetically Active Radiation (FAPAR).
• Calculating vegetation cover fraction (Vcover) and Leaf Area Index (LAI_T, LAI_G) for ecosystem studies.
• Estimating surface roughness length (z0) and zero plane displacement (d) for atmospheric boundary layer models.
• Analyzing snow-free albedo for climate and energy balance research.
• Tracking monthly changes in global vegetation activity over a 17-year period using the corrected NDVI.

Strengths

• Provides a continuous 17-year monthly time series (1982-1998) of global vegetation activity.
• Includes multiple spatial resolutions (1/4, 1/2, and 1 degree) for flexibility in analysis.
• Contains a suite of seven derived biophysical parameters (e.g., FAPAR, LAI, albedo) from a single, corrected source.
• Dataset is a recognized core component of the international ISLSCP Initiative II, indicating peer-reviewed methodology.

Limitations

• Key metadata conflicts exist: the 'last updated' date is listed as both 1998-12-31 and 2026-03-13 across sources.
• Specific row counts, file sizes, and complete column lists are not provided by any source.
• Biophysical parameters are derived assuming a single canopy layer, which may not capture complex multi-layer vegetation structures.

Provenance

Source

NASA's Land Surface Hydrology program and the Higher Education Funding Council for Wales (HEFCW), produced for ISLSCP Initiative II.

Collection Method

Derived from Fourier-Adjusted, Sensor and Solar zenith angle corrected, Interpolated, Reconstructed (FASIR) satellite NDVI data.

Time Range

1982 to 1998

Freshness

2026-03-13 01:33:36.302875

Geography

Global terrestrial coverage at 1/4, 1/2, and 1-degree latitude/longitude resolutions.