Linear trend in yearly vegetation productivity

GIS Map Application Last modified 15 May 2019
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Linear trend of yearly growing season vegetation productivity. Vegetation productivity was derived within the growing season from the PPI vegetation index. The layers shows the R value of the fitted linear regression model. Temporal extent 2000-2016. Spatial resolution 500m. The vegetation index used in the indicator is the Plant Phenology Index (PPI, Jin and Eklundh, 2014). PPI is based on the MODIS Nadir BRDF-Adjusted Reflectance product (MODIS MCD43 NBAR. The product provides reflectance data for the MODIS “land” bands (1 - 7) adjusted using a bi-directional reflectance distribution function. This function models values as if they were collected from a nadir-view to remove so called cross-track illumination effects. The product is distributed with 500 m pixel size (MODIS Sinusoidal Grid) with 8-days compositing period. The web map service was derived from a floating point time series.

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