7ed3f6e5-96a0-4837-8cf3-27ba8afd87f5 Gregory Giuliani UNIGE/GRID gregory.giuliani@unige.ch 2022-10-03T14:12:42 ISO 19115:2003/19139 1.0 2 30 30 30 30 0 0 CH1903+ / LV95 - EPSG:2056 Anthocyanin Reflectance Index (ARI) - Sentinel-2 [2016-2021] - Switzerland 2022-10-03 This dataset is an time-serie of Sentinel-2 Analysis Ready Data (ARD)- derived Anthocyanin Reflectance Index (ARI) computed from Sentinel-2 data. ARI is is a reflectance measurement, sensitive to vegetation pigment content using the forumla ARI = (1/b3) - (1/b5). See Gitelson et al. (2009) DOI: 10.3732/ajb.0800395. Anthocyanins are pigments common in higher plants, causing their red, blue and purple coloration. They provide valuable information about the physiological status of plants, as they are considered indicators of various types of plant stresses. The reflectance of anthocyanin is highest around 550nm. However, the same wavelengths are reflected by chlorophyll as well. To isolate the anthocyanins, the 700nm spectral band, that reflects only chlorophyll and not anthocyanins, is subtracted. ARI values for the examined trees in this original article ranged in values from 0 to 0.2. Values are provided as integer and multiplied by 1000 Metrics: annual (_annual) and seasonal (_spring; _summer; _autumn; _winter) mean (_nanmean), standard dev (_nanstd), min (_nanmin), max (_nanmax), median (_nanmedian), and amplitude (_range) Data format: GeoTiff Gregory Giuliani UNIGE/GRID gregory.giuliani@unige.ch Denisa Rodila UNIGE/GRID denisa.rodila@unepgrid.ch Bruno Chatenoux UNIGE/GRID bruno.chatenoux@unepgrid.ch vegetation ari landscape model raster data nature geocat.ch 2022-09-28 geonetwork.thesaurus.external.theme.geocat.ch Creative Commons Attribution 4.0 International 25000 eng imageryBaseMapsEarthCover environment geoscientificInformation 5.9548 10.467 45.821 47.801 2016-01-01 2021-12-31 https://doi.org/10/gqvbpq DOI Anthocyanin Reflectance Index (ARI) - Switzerland [2016] https://doi.org/10/gqvbpp DOI Anthocyanin Reflectance Index (ARI) - Switzerland [2017] https://doi.org/10/gqvbpr DOI Anthocyanin Reflectance Index (ARI) - Switzerland [2018] https://doi.org/10/gqvbpg DOI Anthocyanin Reflectance Index (ARI) - Switzerland [2019] https://doi.org/10/gqvbpf DOI Anthocyanin Reflectance Index (ARI) - Switzerland [2020] https://doi.org/10/gqvjk9 DOI Anthocyanin Reflectance Index (ARI) - Switzerland [2021] This dataset has been produced using Sentinel-2 data from the Swiss Data Cube