Abstract
The present work addresses the comparison of the sensitivity of leaf chlorophyll estimators vegetation indices (VI), obtainable from Sentinel-2 (S2) spectral bands, in the 1-4 LAI range and of their portability with different crops/soil/illumination conditions. The comparison is addressed by the analysis of a large PROSPECT-SAILH synthetic dataset. Results indicate that the TCI/OSAVI (Triangular Chlorophyll index / Optimized Soil Adjusted Vegetation Index ratio) and MTCI (MERIS Terrestrial Chlorophyll Index), obtainable at 20 m spatial resolution from future S2 data, are the best leaf chlorophyll estimators. The TCI/OSAVI ratio is the best estimator for erectophile crop canopies whereas for planophile canopies the TCI/OSAVI ratio or the MTCI index are the best estimators depending on modelled leaf structure. The CVI (chlorophyll vegetation index), obtainable at 10 m, is the second best estimator for both planophile and erectophile crops canopies.
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