Vegetation Warming Experiment: Chamber and ambient plot digital camera imagery for vegetation phenology, Utqiagvik (Barrow), Alaska, 2017

Time lapse photography of experimental plots within five warming chambers (ZPWs) and paired control plots located on the Barrow Environmental Observatory (BEO), Barrow (now Utqia?vik), Alaska. Images were recorded from 21 June to 18 September, 2017 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 11:00 ? 14:30 Alaska daylight time (AKDT, UTC-8), using Wingscapes TimelapseCam cameras. The target species was Petasites frigidus.The Next-Generation Ecosystem Experiments: Arctic (NGEE Arctic), was a 10-year research effort (2012-2022) 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 Last update: September 16, 2022 2 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).

本数据集为采集自美国阿拉斯加州巴罗（现名乌特恰维克，Utqiagvik）巴罗环境观测站（Barrow Environmental Observatory, BEO）内5个增温舱（warming chambers, ZPWs）及其配对对照样地的实验样地延时摄影影像。拍摄时间为2017年6月21日至9月18日，旨在捕获生长季的植被动态过程，涵盖返青、衰老等植被物候现象。影像录制采用Wingscapes TimelapseCam相机，于阿拉斯加夏令时（Alaska Daylight Time, AKDT, UTC-8）每日11:00至14:30时段内，以30分钟为间隔每日完成拍摄。本数据集的目标研究物种为Petasites frigidus。下一代北极生态系统实验（Next-Generation Ecosystem Experiments: Arctic, NGEE Arctic）是一项为期10年（2012-2022）的研究计划，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共设两个野外研究站点：其一位于阿拉斯加州乌特恰维克（原巴罗）的巴罗环境观测站（BEO）及北坡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厄德半岛的不连续多年冻土区多处区域。通过观测、实验及与现有数据集的综合分析，NGEE Arctic为多尺度建模构建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（E3SM Land Model Component, ELM）在全球泛北极尺度上的过程表征精度提升。本数据集最后更新于2022年9月16日。