Vegetation Warming Experiment: Landscape-scale digital camera imagery for vegetation phenology, Utqiagvik (Barrow), Alaska, 2018

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 BNL TEST group's ZPW (Zero Power Warming) chambers during the growing season of 2018. Images were captured from early spring (13 April) through to mid fall (18 October). Snowmelt, vegetation growth and senescence, and snow accumulation were captured. Images were uploaded to the BNL FTP server every hour until 16 June, and then every 10 minutes. Files were renamed with the date and time of the image. jpg images have been compressed in *.tar.gz format (7.9 GB). Different fields of view (northeasterly) were also captured using 3 Wingscapes TimelapseCam cameras mounted on a mast on the sled shed. Images were recorded from 21 June to 24 September, 2018, at 30 minute intervals, from 11:00 - 14:30, Alaska daylight time (AKDT, UTC-8). Movie files (.mp4) of each Wingscapes camera dataset. Additional metadata included in *.pdf and *.csv files.
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).

本数据集包含由StarDot NetCam SC表型相机（phenocamera）在阿拉斯加州乌特恰维克（Utqiagvik）的巴罗环境观测站（Barrow Environmental Observatory, BEO）雪橇棚顶部朝东拍摄的影像。该相机于2018年生长季布设，用于远程监测植物物候以及BNL TEST小组的ZPW（零功率增温，Zero Power Warming）增温舱的运行状态。影像拍摄时段为早春（4月13日）至秋季中旬（10月18日），涵盖融雪、植被生长与衰老以及积雪积累等过程。2018年6月16日前，影像每小时上传至BNL FTP服务器，此后上传频率调整为每10分钟一次。所有影像文件均以拍摄时的日期和时间重命名，其中JPEG格式的影像已压缩为*.tar.gz打包文件（总大小7.9 GB）。

另有3台安装在该雪橇棚桅杆上的Wingscapes TimelapseCam相机，用于拍摄东北向的不同视场影像。该组影像的记录时段为2018年6月21日至9月24日，采用阿拉斯加夏令时（AKDT, UTC-8），每日拍摄时段为11:00至14:30，拍摄间隔为30分钟。

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气候反馈机制，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项目设有两个野外研究站点：1）位于阿拉斯加州乌特恰维克（原称巴罗）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；2）位于阿拉斯加州诺姆以北苏厄德半岛的不连续永久冻土区域的多个点位。

通过观测、实验以及与现有数据集的综合分析，NGEE Arctic为多尺度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（E3SM陆面模型）在全球泛北极尺度上改进过程表征能力。