This data set consists phenological transition dates, as derived from direct observations of vegetative and reproductive phenology recorded by a human observer, from the SPRUCE experiment during 2020, the fifth full year of whole-ecosystem warming (Hanson et al. 2017). Both spring and autumn phenological events are included.
Since April 2016, human observers have been directly tracking the phenology of both woody and herbaceous species on a weekly schedule within the SPRUCE experimental chambers, these data are reported in annual ground observations data sets (see Related Data Sets). The observed date reported here is the first survey date in 2020 on which an event/phenophase was definitively observed.
This data set also has a companion file containing figures showing the relationship between the day of year and temperature treatment for different phenological phases by species for 2020.
User note: Ground observations of phenology from 2016-2021 are available. See SPRUCE Ground Observations of Phenology in Experimental Plots 2021. for the most recent data as well as links to all other ground phenology datasets.
Schädel, C., K. J. Pearson, A. D. Richardson, J.M. Warren, and P. J. Hanson. 2021. SPRUCE Ground Observations of Phenology in Experimental Plots 2020. Oak Ridge National Laboratory, TES SFA, U.S. Department of Energy, Oak Ridge, Tennessee, U.S.A. https://doi.org/10.25581/spruce.094/1824175.
Friday, October 22, 2021