Vegetation Warming Experiment: Landscape-scale digital camera imagery for vegetation phenology, Utqiagvik (Barrow), Alaska, 2019

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 2019. Images were captured from early spring (4 April) through to mid fall (30 October). Snowmelt, vegetation growth and senescence, and snow accumulation were captured. Images were uploaded to the BNL FTP server every hour, then from 2019-06-27 to 2019-10-02 images were recorded every 10 minutes, then at hourly intervals until the end of data collection on 2019-10-30. Files were renamed with the date and time of the image. jpg images have been compressed in *.tar.gz format (5.6 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 2019-06-23 to 2019-09-25, with images recorded every 30 minutes from 9:00 to 16:30 Alaska daylight time (AKDT, UTC-8). Individual jpg images have been compressed in zip format for each camera and also presented as mp4 timelapse movies. 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).本数据集的影像由StarDot NetCam SC型物候相机（StarDot NetCam SC phenocamera）拍摄，拍摄点位位于美国阿拉斯加州乌恰克维克（Utqiagvik，旧称巴罗）的巴罗环境观测站（Barrow Environmental Observatory, BEO）雪橇棚顶部，朝向正东方向。该相机的部署目的为远程监测2019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（Zero Power Warming）增温实验舱的运行状态。影像采集时段从早春（4月4日）延续至秋中（10月30日），完整记录了融雪、植被生长与衰老、积雪累积等过程。影像每小时自动上传至BNL的FTP服务器；2019年6月27日至2019年10月2日期间，采集频率调整为每10分钟一次，此后恢复为每小时采集一次，直至2019年10月30日数据采集工作结束。所有影像文件均以拍摄时的日期和时间命名。原始JPEG格式影像已打包压缩为*.tar.gz格式文件，总大小为5.6 GB。此外，研究团队还在雪橇棚的桅杆上部署了4台Wingscapes TimelapseCam相机，用于捕捉东北方向的近距离视野。该组相机的运行时段为2019年6月23日至2019年9月25日，采集时段为阿拉斯加夏令时（AKDT, UTC-8）每日9:00至16:30，每30分钟拍摄一张影像。单台相机对应的JPEG影像已分别打包为zip压缩文件，同时还提供了mp4格式的延时摄影视频。下一代北极生态系统实验（Next-Generation Ecosystem Experiments: Arctic, NGEE Arctic）是一项旨在通过深化对富碳北极生态系统的预测性理解及其对气候的反馈机制，以降低地球系统模型不确定性的研究计划。该项目由美国能源部生物与环境研究办公室资助。NGEE Arctic项目共设有两处野外研究站点：1）位于阿拉斯加州乌恰克维克（巴罗）附近北坡的巴罗环境观测站区域的北极多边形苔原沿海地带；2）位于阿拉斯加州诺姆以北苏华德半岛的不连续多年冻土区的多处点位。通过观测、实验与现有数据集的综合分析，NGEE Arctic为多尺度建模提供了更完善的知识库，并助力美国能源部地球系统模型——能源极值计算地球系统模型（Energy Exascale Earth System Model, E3SM），尤其是其E3SM陆面模型组件（ELM），在全球泛北极尺度上优化了过程表征。