Panama leaf water potential census 2015-2019

This dataset contains values of leaf water potential from a monthly census of predawn and midday measurements conducted on nine trees in each of two sites in Panama from December 2015 to July 2019. The dataset includes individual measurements that were made with a pressure chamber. The measurements were made on the focal trees to complement concurrent measurements of sap flow. The trees were also intensively measured for leaf-level physiological condition during the 2016 ENSO campaign conducted by NGEE-tropics. A subset of measurements was made on leaves that were sealed in plastic bags and protected from solar radiation before they were collected, such that the measurements assessed branch water potential. The dataset contains a csv file that has columns for the time, location, and value of each measurement. The dataset also contains a metadata file, column description file, and an E-Field log file in the recommended NGEE-Tropic formats. This dataset was originally published on the NGEE Tropics Archive and is being mirrored on ESS-DIVE for long-term archival Acknowledgement: Funding for NGEE-Tropics data resources was provided by the U.S. Department of Energy Office of Science, Office of Biological and Environmental Research.本数据集收录了2015年12月至2019年7月期间，在巴拿马两处样地各9棵目标样树上开展的月度普查式黎明前与正午叶片水势（leaf water potential）测定数据。所有测定均采用压力室（pressure chamber）完成，采集自目标样树，用于补充同步开展的液流（sap flow）测定工作。2016年厄尔尼诺-南方涛动（ENSO）野外考察期间，研究团队还针对这些树木开展了高强度的叶片水平生理状态测定，该考察由下一代生态系统实验-热带（NGEE-Tropics）发起。部分测定样本的叶片在采集前被密封于塑料袋中并遮蔽日光直射，此类测定用于评估枝条水势。本数据集包含一份逗号分隔值（CSV）文件，其中包含各次测定的时间、样地位置与测定值三列数据；同时附带符合NGEE-Tropics推荐格式的元数据（metadata）文件、字段说明文件与E-Field现场日志文件。本数据集最初发布于NGEE Tropics档案库，现由ESS-DIVE镜像存档以实现长期留存。致谢：NGEE-Tropics数据资源的资助方为美国能源部科学办公室生物与环境研究局。