Leaf-to-canopy spectral reflectance, February 2018, PA-SLZ: Panama

Canopy reflectance spectra of 37 trees were measured at the Smithsonian Tropical Research Institute (STRI) San Lorenzo Protected Area site (PA-SLZ), utilising the canopy access crane to access fully sunlit leaves. Data were recorded in the middle of the day, with 20–50 measurements for each tree. The canopy structure for each crown was captured using a digital camera. Leaf-level reflectance and leaf demographic composition (age class) was recorded in detail for a > 0.5 meter branch sampled from each canopy tree (corresponding to the position where canopy spectra were measured). This dataset includes processed canopy and leaf-level spectral measurements (*.xlsx), raw spectral data (Spectral Evolution PSR+, *.raw, *.sed), sample details (*.xlsx) and *.pdf summaries containing low resolution photographs of the measured canopies. This dataset was originally published on the NGEE Tropics Archive and is being mirrored on ESS-DIVE for long-term archival Acknowledgement: This research was supported as part of NGEE-Tropics, funded by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research under contract no. DE-SC0012704. The authors would like to acknowledge Osvaldo Calderón ([e-mail]) of STRI for assistance with species identification.本研究在史密森热带研究所（Smithsonian Tropical Research Institute, STRI）圣洛伦佐保护区站点（PA-SLZ）完成了37棵树木的冠层反射光谱（canopy reflectance spectra）测量：研究人员借助冠层访问起重机（canopy access crane）获取完全受光的叶片，于正午时段开展数据记录，每棵树木采集20至50组光谱测量数据。 利用数码相机采集每棵树冠的冠层结构信息。 针对每棵冠层树木采集的、对应冠层光谱测量点位的长度超0.5米的枝条，研究人员详细记录了叶片尺度反射率与叶片种群人口统计学组成（年龄层级，age class）。 本数据集包含处理后的冠层与叶片尺度光谱测量数据（*.xlsx）、原始光谱数据（由Spectral Evolution PSR+仪器采集，格式为*.raw、*.sed）、样本详情数据（*.xlsx），以及包含测量冠层低分辨率照片的*.pdf汇总文件。 本数据集最初发布于NGEE Tropics档案馆，目前已在ESS-DIVE平台进行镜像，以实现长期归档。 致谢：本研究作为NGEE-Tropics项目的一部分获得资助，该项目由美国能源部科学办公室生物与环境研究局根据合同编号DE-SC0012704资助。作者谨致谢意史密森热带研究所的Osvaldo Calderón（邮箱：[e-mail]）在物种鉴定方面提供的协助。