Ecosystem phenology

vegetationecosystem-function
Seasonality of ecosystem-level fluxes and structure — start-of-season, peak-of-season, end-of-season and growing-season-length derived from satellite vegetation indices (MODIS MCD12Q2, Sentinel-2/3 HR-VPP, Landsat LCMAP) and eddy-covariance NEE seasonality (FLUXNET, ICOS, NEON, AmeriFlux). Distinct from species-level phenology — the unit is the pixel or footprint, not the organism. Key indicator of climate- driven shifts in carbon uptake and drought stress.
Canonical units: day of year or s