Phenology is the study of plant and animal life cycles in relation to the seasons. EROS maintains a set of nine annual phenological metrics for the conterminous United States, all curated from satellite data. Taken together, the metrics represent a powerful tool for documenting life cycle trends and the impacts of climate change on ecosystems.
Historical remote sensing phenology (RSP) image data and graphics for the conterminous U.S. are made freely available from the USGS/EROS Center. Five data sets are distributed: CONUS 1 km AVHRR RSP data, Eastern CONUS 250 m eMODIS RSP data, Western CONUS 250 m eMODIS RSP data, Eastern CONUS 375 m eVIIRS RSP data, and Western CONUS 375 m RSP data.