Testing the robustness of the Plant Phenology Index to changes in temperature
Traditional vegetation indices have long encountered a problem of saturating at high biomass levels. A newly formulated vegetation index, the Plant Phenology Index (PPI), which has a near linear relationship with canopy green leaf area index (LAI) is tested in this study against temperature at 12 sites across Sweden. For comparison, the performance of the Normal Difference Vegetation Index (NDVI)
