Dataset of "Snowmelt timing constrains green-up but not peak productivity in alpine grasslands of the western Pyrenees"

Main data used in the production of the research article "Snowmelt timing constrains green-up but not peak productivity in alpine grasslands of the western Pyrenees" submitted to BG/TC special issue.

You will find the following items:

• source_NDVI_maps (folder): contains all the Sentinel-2-derived NDVI maps (tiff format) of the study area during the study period. Generated through Google Earth Engine (GEE). The date is included in the file name.
• source_snow_maps (folder): contains all the Sentinel-2-derived binary snow presence maps (tiff format) of the study area during the study period. Generated through GEE. The date is included in the file name.
• result_maps (folder): includes the main maps generated from the source folders: annual 15-day aggregated snow melt-out date (SMOD) maps, 2018-2025 average SMOD map and 2018-2025 average peak NDVI map (tiff format)
• sunmasks (folder): includes the 3 sun masks generated with function r.sunmask in GRASSGIS at the time of acquisition of satellite images at the beginning (February 15), middle (June 20) and end (September 30) of the annual analysis period, as georeferenced tiff files. The date of each sun mask is included in the name tag. They were used for the shade presence analysis.
• Studyarea_DEM_10m.tiff: Digital Elevation Model of the study area, used as the base layer in Figure 1 of the manuscript.
• fSCA_IZAS_series.csv: csv file containing the evolution of fractional snow cover area (fSCA, a fraction where 0 represents a completely snow-free region and 1 a fully snow-covered one) during the 2018-2023 period in the Izas experimental catchment as captured with a time-lapse camera. Column "DOY" represents the day of the year of each observation.
• fSCA_Sentinel_series.csv: csv file containing the evolution of fSCA during the 2018-2025 period in the whole study area as obtained from the Sentinel-2-derived snow maps. Column "yday" represents the day of the year of each observation.