Site: Harvard Forest LTER

Postdoctoral fellow David Basler releases his drone from the top of Harvard Forest’s walk-up tower.
Credit: David R. Foster- Harvard Forest Archives

Over the last 30 years, spring phenology has advanced across eastern North America, increasing photosynthesis and net ecosystem carbon storage, with a small negative feedback to climate change. Beginning in 1990 as a biannual pen-and-paper record of bud break and leaf fall, HFR LTER launched the PhenoCam Network in 2008, a continental scale observatory of digital imagery tracking phenology at fine spatial and temporal scales.