Site-level Foliar C, N, delta13C data from samples collected during field survey associated with NEON AOP survey, East River, CO 2018

Carbon (C) and nitrogen (N) weight percent concentrations were obtained from the bulk foliar samples collected across East River, Washington Gulch, Slate River, and Coal Creek watersheds in Gunnison, Colorado during the summer of 2018. These samples were collected from sun-lit leaves of meadow, shrub, and tree vegetation types within 72 hours of the National Ecological Observatory Network Airborne Observation Platform (NEON AOP) hyperspectral survey. These samples were dried and then run on an elemental analyzer coupled to a mass spectrometer for C and N concentrations and delta13C. The intention of these data were to provide ground truth data to develop foliar nutrient models across the imaging spectroscopy domain. Additional associated site metadata and vegetation fractional cover information can be found in the associated data releases (DOI: 10.15485/1618130). Here we provide site level C, N, and delta 13C data in the CN_Results_Foliar.csv. All of these samples were also registered with IGSN codes, and the details from that registration with metadata for the samples is included in foliar_sample_igsn_metadata.csv.

2018年夏季，研究团队于美国科罗拉多州甘尼森地区的东河（East River）、华盛顿谷（Washington Gulch）、板岩河（Slate River）与煤溪（Coal Creek）流域采集批量叶片样品，由此获得碳（Carbon，C）与氮（Nitrogen，N）的重量百分比浓度数据。所有样品均采集自草地、灌丛与乔木植被类型的向阳叶片，采集时间均处于国家生态观测站网络机载观测平台（National Ecological Observatory Network Airborne Observation Platform，NEON AOP）高光谱测量任务完成后的72小时内。样品经干燥处理后，使用连接质谱仪的元素分析仪测定碳、氮浓度与碳同位素比值δ¹³C。本数据集旨在提供地面真值数据，用于构建成像光谱学领域的叶片养分预测模型。额外相关的样地元数据与植被覆盖度信息可参见关联数据集发布内容（DOI：10.15485/1618130）。本次发布的CN_Results_Foliar.csv文件中包含样地尺度的碳、氮及δ¹³C数据。所有样品均已注册国际地质样本编号（IGSN），相关注册详情与样品元数据已收录于foliar_sample_igsn_metadata.csv文件中。