Vegetation Warming Experiment: Chamber and ambient plot digital camera imagery for vegetation phenology, Utqiagvik (Barrow), Alaska, 2021

Time lapse photography of experimental plots within five warming chambers (ZPWs) and paired control plots located on the Barrow Environmental Observatory (BEO), Utqiagvik, Alaska. Images were recorded from 17 June to 19 September, 2021 to capture vegetation dynamics during the growing season. Vegetation phenology, including green up and senescence were captured. Images were recorded daily at 30 minute intervals, from 09:00 ? 16:30 Alaska daylight time (AKDT, UTC-8), using Wingscapes TimelapseCam Pro cameras. The target species was Carex aquatilis. 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).本数据集为阿拉斯加州乌恰维克（Utqiagvik，原巴罗）巴罗环境观测站（Barrow Environmental Observatory, BEO）内5个增温箱（ZPWs）及配对对照样地的实验样地延时摄影影像。拍摄时段为2021年6月17日至9月19日，旨在捕捉生长季的植被动态，涵盖植被返青与衰老等植被物候过程。采用Wingscapes TimelapseCam Pro相机，按照阿拉斯加夏令时（Alaska daylight time, AKDT, UTC-8）每日09:00至16:30期间，以30分钟为间隔采集影像。本数据集的目标观测物种为湿地苔草（Carex aquatilis）。各相机拍摄的单张JPEG影像已打包为zip压缩格式。数据集包附带一份元数据文档，其中包含各相机的视场示例文件（*.pdf格式）。下一代北极生态系统实验（Next-Generation Ecosystem Experiments: Arctic, NGEE Arctic）是一项旨在通过构建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项目共设有两个野外研究站点：其一位于阿拉斯加州乌恰维克（巴罗）附近的北坡，以及巴罗环境观测站（BEO）内的北极多边形苔原沿海区域；其二涵盖阿拉斯加州诺姆以北苏华德半岛不连续永久冻土区域的多处地点。通过观测、实验及与现有数据集的综合分析，NGEE Arctic项目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——能源极端尺度地球系统模型（Energy Exascale Earth System Model, E3SM），尤其是其陆面模型模块（ELM）——提升了全球泛北极尺度下的生态过程表征能力。