Sap flow data from San Lorenzo, Panama (PA-SLZ), 2019

This data package contains sap flow data from the NGEE Tropics site in San Lorenzo, Panama (PA-SLZ) from 22 January 2019 to 31 December 2019. Sap flow measurements quantify plant-level transpiration, which varies across spatial and temporal scales. It is a key trait in understanding plant hydraulic functioning. Here sap flow was measured using ‘Granier-type’ thermal dissipation probes. Raw data downloaded from each data logger are in the 'Raw data' folder as CSV files, along with the Campbell data logger programs which can be read when opened with a text editor. The data was processed using the AquaFlux package in R. R code for preparing the data for use in AquaFlux is in the 'R code for pre-processing data folder'; it is saved as a text file that can be copy and pasted into R. The processed data for each data logger is in the 'Processed data' folder as CSV files. Documentation for the Granier sensors and AquaFlux package is in the ‘Manuals’ folder as PDF files. 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.本数据包包含2019年1月22日至2019年12月31日期间，巴拿马圣洛伦佐NGEE Tropics站点（PA-SLZ）的树干液流（sap flow）数据。树干液流测量可量化植株尺度的蒸腾作用，该过程随空间与时间尺度动态变化，是解析植物水力功能的关键功能性状。本研究中采用Granier型热消散探针（Granier-type thermal dissipation probes）开展树干液流测量。从各数据记录仪下载的原始数据以CSV格式存储于"Raw data"文件夹中，同时附带可通过文本编辑器打开读取的Campbell数据记录仪程序文件。本数据集通过R语言的AquaFlux数据包（AquaFlux package）完成处理；用于将数据预处理为适配AquaFlux格式的R代码存储于"R code for pre-processing data"文件夹中，保存为可直接复制粘贴至R运行环境的文本文件。各数据记录仪对应的处理后数据以CSV格式存储于"Processed data"文件夹中。Granier传感器与AquaFlux数据包的相关文档以PDF格式存储于"Manuals"文件夹中。本数据集最初发布于NGEE Tropics档案馆，现由ESS-DIVE镜像存储以实现长期归档。致谢：NGEE-Tropics数据资源的资助由美国能源部科学办公室生物与环境研究局提供。