Maps of Arctic vegetation leaf nitrogen concentration, albedo and plant functional type (PFT) derived from imaging spectroscopy data, Council watershed, Seward Peninsula, Alaska, 2019

Remote sensing maps of surface albedo, leaf nitrogen content, and plant functional types (PFTs) derived from NASA's Airborne Visible / Infrared Imaging Spectrometer Next Generation (AVIRIS-NG) by the Terrestrial Ecosystem Science & Technology (TEST) group at Brookhaven National Laboratory. The AVIRIS-NG imaging spectroscopy data (380 ~ 2510 nm) was collected as a part of the collaboration between NASA's Arctic-Boreal Vulnerability Experiment (ABoVE; Miller et al., 2019) and DOE's Next Generation Ecosystem Experiment in the Arctic (NGEE-Arctic). This package includes maps for the NGEE-Arctic Council watershed created using AVIRIS-NG imagery collected on July 9th, 2019. The map data and metadata are provided as image (ENVI, *.png) and text (*.txt, *hdr) formats. Additional supporting map quicklooks are provided as *.png files and GIS *.kml files. Detailed description of the methods for each map are provided in this document. These datasets are provided in support of Figure 6 in Nelson et al., (2022), "Remote Sensing of Tundra Ecosystems using High Spectral Resolution Reflectance: Opportunities and Challenges". The full citation can be found within the references section. Note that the AVIRIS-NG leaf nitrogen product included in this dataset is a preliminary product and is provided for demonstration purposes only. It is not recommended that the map be used for scientific applications. For future updates on these products, please contact the authors. The Next-Generation Ecosystem Experiments: Arctic (NGEE Arctic), was a research effort to reduce uncertainty in Earth System Models by developing a predictive understanding of carbon-rich Arctic ecosystems and feedbacks to climate. NGEE Arctic was supported by the Department of Energy's Office of Biological and Environmental Research. The NGEE Arctic project had two field research sites: 1) located within the Arctic polygonal tundra coastal region on the Barrow Environmental Observatory (BEO) and the North Slope near Utqiagvik (Barrow), Alaska and 2) multiple areas on the discontinuous permafrost region of the Seward Peninsula north of Nome, Alaska. Through observations, experiments, and synthesis with existing datasets, NGEE Arctic provided an enhanced knowledge base for multi-scale modeling and contributed to improved process representation at global pan-Arctic scales within the Department of Energy's Earth system Model (the Energy Exascale Earth System Model, or E3SM), and specifically within the E3SM Land Model component (ELM).

地表反照率（surface albedo）、叶氮含量及植物功能类型（PFTs）的遥感地图，由布鲁克海文国家实验室陆地生态系统科学与技术（TEST）小组基于美国国家航空航天局（NASA）的下一代机载可见/红外成像光谱仪（AVIRIS-NG）数据生成。AVIRIS-NG成像光谱数据（380~2510 nm）是NASA北极-北方脆弱性实验（ABoVE；Miller et al., 2019）与美国能源部（DOE）北极下一代生态系统实验（NGEE-Arctic）合作研究的一部分。本数据包包含利用2019年7月9日采集的AVIRIS-NG影像生成的NGEE-Arctic理事会流域地图。地图数据及元数据以图像格式（ENVI、*.png）和文本格式（*.txt、*.hdr）提供，额外的辅助地图预览以*.png文件和地理信息系统（GIS）*.kml文件形式呈现。每张地图的方法细节描述见本文档。这些数据集旨在支持Nelson等人（2022）的图6，对应论文为《利用高光谱分辨率反射率遥感苔原（tundra）生态系统：机遇与挑战》，完整引文可在参考文献部分查阅。请注意，本数据集包含的AVIRIS-NG叶氮产品为初步版本，仅用于演示目的，不建议用于科学应用；有关产品未来更新，请联系作者。北极下一代生态系统实验（NGEE Arctic）是一项研究计划，旨在通过建立对富碳北极生态系统及其气候反馈的预测性理解，降低地球系统模型（Earth System Models）的不确定性。该计划由DOE生物与环境研究办公室资助，设有两个野外研究站点：1）位于阿拉斯加Utqiagvik（Barrow）附近北坡的巴罗环境观测站（BEO）及北极多边形苔原沿海区域；2）阿拉斯加Nome以北苏厄德半岛不连续多年冻土区的多个地点。通过观测、实验及与现有数据集的整合，NGEE Arctic为多尺度建模提供了更丰富的知识基础，助力改进美国能源部地球系统模型（能源级地球系统模型，E3SM）中全球泛北极尺度的过程表征，尤其是E3SM陆地模型组件（ELM）的表征。