Tower-Based Visible and Near-Infrared Remote Sensing Observations at Caribou-Poker Creeks Research Watershed (Alaska) (April 2023 - July 2024)

This dataset consists of tower-based remote sensing measurements collected using a pair of Fluospec2 (FS2; Yang et al., 2018) instruments, each consisting of two QEPro spectrometers (Ocean Optics, Orlando, USA), installed at the Caribou-Poker Creeks Research Watershed National Ecological Observatory Network (NEON) site (site abbreviation: BONA) near Fairbanks, Alaska. Remote sensing observations include solar-induced fluorescence, derived via a spectral fitting method, near-infrared reflectance of vegetation, and several vegetation indices that can collectively be used to evaluate canopy productivity, photosynthetic phenology, and physiology. Data was collected from two subsites, one FS2 (frequency-synthesizer) instrument installed at each site, located roughly one kilometer apart along a topographic gradient. The evergreen site consists of a black spruce canopy and a lichen and moss understory, with a few larch trees interspersed. The FS2 instrument here was installed on an observation tower (latitude/longitude: 65.15401/-147.50258) installed by NEON that also hosts NEON's meteorological and flux instruments, with the FS2 instrument observing a cluster of black spruce (Picea mariana) trees. At the deciduous site (latitude and longitude: 65.15686833, -147.50367667), a mast was installed within a deciduous canopy consisting of alaskan paper birch (Betula neoalaskana), black spruce, and quaking aspen (Populus tremuloides) trees located roughly one kilometer (km) uphill from the evergreen site. The FS2 instrument installed here observed a paper birch tree located near-nadir from the instrument. Literature Citation: Yang, X., Shi, H., Stovall, A., Guan, K., Miao, G., Zhang, Y., Zhang, Y., Xiao, X., Ryu, Y., & Lee, J. E. (2018). FluoSpec 2—an automated field spectroscopy system to monitor canopy solar-induced fluorescence. Sensors (Switzerland), 18(7). https://doi.org/10.3390/s18072063

本数据集包含基于塔架的遥感观测数据，采集自两台Fluospec2（FS2；Yang等，2018）仪器。每台仪器搭载两台QEPro光谱仪（海洋光学（Ocean Optics），美国奥兰多），安装于阿拉斯加费尔班克斯附近的驯鹿-波克河研究流域国家生态观测站网络（National Ecological Observatory Network，NEON）站点（站点缩写：BONA）。遥感观测内容包括通过光谱拟合方法反演得到的太阳诱导叶绿素荧光（solar-induced fluorescence）、植被近红外反射率，以及可共同用于评估冠层生产力、光合物候与生理特性的多种植被指数。数据采集自两个子站点，每个站点均安装一台FS2（频率合成器）仪器，两个站点沿地形梯度分布，间距约1公里。常绿站点的冠层为黑云杉，林下覆盖地衣与苔藓，其间散生少量落叶松。该站点的FS2仪器安装于NEON架设的观测塔（经纬度：65.15401/-147.50258），该塔同时搭载NEON的气象与通量观测仪器，FS2仪器的观测目标为一片黑云杉（Picea mariana）林。落叶站点（经纬度：65.15686833, -147.50367667）内架设了一座测杆，其所在冠层由阿拉斯加纸桦（Betula neoalaskana）、黑云杉以及美洲颤杨（Populus tremuloides）构成，该站点位于常绿站点上坡方向约1公里处。该站点安装的FS2仪器的观测目标为位于仪器近天底方向的一株纸桦。文献引用：Yang, X., Shi, H., Stovall, A., Guan, K., Miao, G., Zhang, Y., Zhang, Y., Xiao, X., Ryu, Y., & Lee, J. E. (2018). FluoSpec 2——一款用于监测冠层太阳诱导叶绿素荧光的自动化野外光谱系统. 传感器（瑞士）, 18(7). https://doi.org/10.3390/s18072063