Collection 005 Change Summary for the MODIS

1. Modification of parameters in Biome Property Look-Up Table (BPLUT) to agree with GPP derived from measurements at eddy flux towers and synthesized NPP. 2. Alteration of growth respiration module in the collection 004 to make it is 25% of annual NPP, rather than being dependent on the annual maximum LAI. 3. Replacement of the constant Q10 quotient of 2.0 for vegetation maintenance respiration calculation with a variable Q10, which changes with air temperature. 4. Spatially non-linear interpolation of coarse resolution meteorological data into 1km MODIS pixel level, instead of nearest neighbor sampling, to increase the accuracy of meteorological data input at pixel level. 5. Limitations of the collection 005 comprise two aspects. First, the BPLUT may be subject to change if collection 005 MODIS FPAR/LAI or new version of meteorological data have large changes. Second, 8-day data and annual NPP are subject to incorrect estimates caused by contaminated FPAR/LAI. The in-house reprocessing is required to clean these contaminated inputs, and users are encouraged to obtain the improved annual MODIS NPP from website of the principal investigator or Dr. Running directly. 6. References