Leaf spectra by leaf age, Feb2017, PA-SLZ: Panama

This data package contains leaf spectra of sunlit canopy leaves of the species Apeiba membranacea, Guatteria dumetorum, Miconia borealis, Terminalia amazonia, Virola multiflora, and Vochysia ferruginea in the Bosque Protector San Lorenzo (PA-SLZ) NGEE Tropics site in Panama. Leaf spectra was measured on young, mature, and old leaves collected before dawn and around midday on five days during February of 2017. Leaf data includes temperature (pre- and post-spectral measurement) and leaf size (length, width). Within the attached zip file there are three PDF files, one with collection protocols and two manuals for the instruments used. Metadata is included in two Excel files, "E-Field_Log_2017_BNL_Panama" "File_Submission_Metadata_2017_SLZ_leafSpec". Leaf spectral data is included in Excel format as "NGEE-Tropics_Panama_2017_Leaf_Spectra_ByAgeV2." and the same data as csv in "Spectral_Data.csv" This data was collected as part of the 2017 Brookhaven National Lab and Smithsonian Tropical Research Institute leaf traits by age campaign. Related datasets include further sample details, leaf water potential, sap flow, leaf mass per area (LMA), gas exchange, and leaf chemistry. 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.

本数据包收录了巴拿马圣洛伦佐保护林（PA-SLZ）NGEE Tropics站点内6个物种的阳光冠层叶片光谱数据，涉及物种包括Apeiba membranacea、Guatteria dumetorum、Miconia borealis、Terminalia amazonia、Virola multiflora及Vochysia ferruginea。

上述叶片光谱采集于2017年2月的5个采样日，分别在黎明前与午间时段采集了幼叶、成熟叶与老叶样本。本次采集的叶片数据包含光谱测量前后的叶片温度，以及叶长、叶宽等叶片尺寸参数。

附带压缩包内含3份PDF文档：1份为采样规程，其余2份为本次实验所用仪器的操作手册。元数据存储于2个Excel文件中，分别为《E-Field_Log_2017_BNL_Panama》与《File_Submission_Metadata_2017_SLZ_leafSpec》。

叶片光谱数据以Excel格式存储于《NGEE-Tropics_Panama_2017_Leaf_Spectra_ByAgeV2》，同时提供CSV格式副本《Spectral_Data.csv》。

本数据集为2017年布鲁克海文国家实验室（Brookhaven National Lab，BNL）与史密森尼热带研究所联合开展的「按叶龄划分叶片性状」研究项目的产出成果。相关数据集涵盖更多样本细节、叶片水势、液流速率、比叶重（Leaf Mass per Area, LMA）、气体交换参数以及叶片化学组分数据。

本数据集最初发布于NGEE Tropics档案库，目前由ESS-DIVE镜像存储以实现长期归档。

致谢：本研究作为NGEE-Tropics项目的组成部分，获得美国能源部科学办公室生物与环境研究局的资助（合同号：DE-SC0012704）。