SPRUCE Ground Observations of Phenology in Experimental Plots, 2020

This data set consists of one comma separated (*.csv) file containing 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 contains a companion file in HTML (*.html) format 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. SPRUCE Ground Observations of Phenology in Experimental Plots 2021, https://doi.org/10.25581/spruce.099/1874936 for the most recent data as well as links to all other ground phenology datasets.

该数据集包含一个逗号分隔（*.csv）文件，记录了物候转换日期——这些日期源自2020年SPRUCE实验中人类观察者对植物营养生长及繁殖物候学（phenology）的直接观测；2020年是全生态系统变暖实验的第五个完整年份（Hanson等人，2017）。数据集中同时涵盖春季与秋季的物候事件。

自2016年4月起，人类观察者每周在SPRUCE实验舱内直接追踪木本及草本物种的物候学特征；相关数据已纳入年度地面观测数据集（参见相关数据集）。本数据集记录的观测日期，为2020年首次明确观测到某一事件/物候期（phenophase）的调查日期。

该数据集还包含一个HTML格式（*.html）的配套文件，其中的图表展示了2020年不同物种在各物候期与日序及温度处理之间的关系。

用户说明：2016-2021年的物候地面观测数据均已开放获取。最新数据及所有其他地面物候数据集的链接，请参见《2021年SPRUCE实验样地物候地面观测》（DOI：https://doi.org/10.25581/spruce.099/1874936）。