Vegetation Warming Experiment: Landscape-scale digital camera imagery for vegetation phenology, Utqiagvik, Alaska, 2021

Images captured using a StarDot NetCam SC phenocamera looking east from the top of the Barrow Environmental Observatory (BEO) Sled Shed, Utqiagvik, Alaska. The camera was installed to remotely monitor plant phenology and operation of the Brookhaven National Laboratory (BNL) TEST group's ZPW (Zero Power Warming) chambers during the growing season of 2021. Images were captured from early spring (1 April) through to mid fall (22 October). Snowmelt, vegetation growth and senescence, and snow accumulation were captured. Images were uploaded to the BNL FTP server every hour, then from 2021-07-09 images were recorded every 10 minutes until the end of data collection on 2021-10-22. Images have been combined in *.zip format (6.1 GB). Closer fields of view (northeasterly) were also captured using 4 Wingscapes TimelapseCam cameras mounted on a mast on the sled shed. These cameras were operated from 2021-06-19 to 2021-09-22, with images recorded every 30 minutes from 9:00 to 16:30 Alaska daylight time (AKDT, UTC-8). Individual jpg images from each camera have been combined in zip format. The data package includes a metadata document with example fields of view from each camera (*.pdf). 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).

本数据集的影像采用StarDot NetCam SC物候相机（phenocamera）采集，拍摄点位位于阿拉斯加州乌恰克维克（Utqiagvik）的巴罗环境观测站（Barrow Environmental Observatory, BEO）雪橇棚顶，朝向正东方向。该相机部署用于远程监测2021年生长季的植物物候，以及布鲁克海文国家实验室（Brookhaven National Laboratory, BNL）TEST团队的ZPW（零功率增温，Zero Power Warming）增温舱的运行状态。影像采集时段覆盖早春（4月1日）至仲秋（10月22日），涵盖融雪、植被生长与衰老、积雪累积等关键生态过程。影像最初每小时上传至BNL的FTP服务器；自2021年7月9日起，采集频率调整为每10分钟一次，直至2021年10月22日数据采集结束。所有影像已打包为*.zip格式压缩包，总大小6.1 GB。此外，研究团队在雪橇棚的桅杆上安装了4台Wingscapes TimelapseCam相机，用于获取更近距离的东北向视野。该组相机的运行时段为2021年6月19日至2021年9月22日，按阿拉斯加夏令时（Alaska daylight time, AKDT, UTC-8）每日9:00至16:30每30分钟录制一次影像。各相机的单张JPEG影像已分别打包为zip格式压缩包。本数据集附带一份元数据文档，其中包含各相机的视野示例（*.pdf格式）。下一代生态系统实验：北极（Next-Generation Ecosystem Experiments: Arctic, NGEE Arctic）是一项核心研究项目，旨在通过构建对富碳北极生态系统的预测性认知及其气候反馈机制，降低地球系统模型的预测不确定性。该项目由美国能源部生物与环境研究办公室资助。NGEE Arctic共设有两处野外研究站点：其一为位于阿拉斯加州乌恰克维克（原巴罗）附近北坡的巴罗环境观测站（BEO）内的北极多边形苔原沿海区域；其二为阿拉斯加州诺姆以北苏厄德半岛的不连续永久冻土区的多处地块。通过野外观测、控制实验与现有数据集的综合整合，NGEE Arctic为多尺度生态建模提供了更为完善的知识库，并助力美国能源部地球系统模型——能源极端尺度地球系统模型（Energy Exascale Earth System Model, E3SM），尤其是其陆面模型组件（ELM）——在全球泛北极尺度上优化了过程表征方法。