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.本数据集于史密森尼热带研究所（Smithsonian Tropical Research Institute, STRI）圣洛伦佐保护区样地（PA-SLZ）开展，利用冠层接入起重机获取37株树木的完全受光叶片的冠层反射光谱。测量于正午时段进行，每株树木采集20至50组光谱数据。研究人员使用数码相机记录了每株树木树冠的冠层结构；同时从每株对应冠层光谱测量点位的采样树木上截取长度大于0.5米的枝条，对其叶片级反射光谱及叶片种群组成（年龄级）进行了详细记录。本数据集包含经处理的冠层及叶片级光谱测量数据（*.xlsx）、原始光谱数据（Spectral Evolution PSR+，*.raw、*.sed）、样地详细信息（*.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平台进行镜像存档以实现长期留存。致谢：本研究作为NGEE-Tropics项目的一部分得到资助，该项目由美国能源部科学办公室生物与环境研究局通过合同编号DE-SC0012704资助。作者感谢史密森尼热带研究所的Osvaldo Calderón（[e-mail]）在物种鉴定方面提供的帮助。