Seasonal Water Table Depth (WTD) from the Mobile Instrumented System Platform (MISP) grid in Barrow and Atqasuk, Alaska 2021

Seasonal water table depth measurements were collected during the 2021 growing seasons at each Mobile Instrumented System Platform (MISP) located at Utqiaġvik (formerly Barrow), Alaska as well as in Atqasuk, Alaska. If a uniform representation of the water table within each plot was visible, then a Water Table Depth (WTD) tube was placed there to measure the change in water table throughout the season. One water table depth measurement was acquired, the date, start and end times, and the people present were also recorded, at alternating grid meters. Water table depth was taken on the north side of the grid at each WTD tube in order to reduce disturbance of vegetation. These measurements are part of the Arctic Observing Network (AON) - International Tundra Experiment (ITEX) initiative and help to document seasonal changes in surface moisture and structure at high spatial scales. Special note on coronavirus disease 2019 (COVID-19) impact: 2021 summer field work was partly restricted due to the COVID-19 ongoing pandemic. Travel to native villages required a 10 to 14-day quarantine period after arrival, prompting field work to start at later dates than usual. Despite missing June sampling dates, we consider the basic field observations a success as we received at least one complete set of field observations from each site.

本数据集采集了2021年生长季期间，阿拉斯加州乌特恰维克（原名为巴罗）及阿拉斯加州阿塔苏克的各移动式仪器系统平台（Mobile Instrumented System Platform, MISP）处的季节性地下水位埋深监测数据。若样地内地下水位呈现均匀分布状态，则在此处安装地下水位埋深管（Water Table Depth, WTD），以监测整个生长季内地下水位的动态变化。在间隔布设的网格测点上完成单次地下水位埋深监测的同时，一并记录监测日期、监测起止时刻及在场人员信息。为减少对植被的干扰，各WTD管对应的地下水位埋深监测均在网格北侧开展。本监测数据隶属于北极观测网（Arctic Observing Network, AON）——国际苔原实验（International Tundra Experiment, ITEX）计划，旨在高空间分辨率下记录地表湿度与地表结构的季节性变化。关于2019冠状病毒病（coronavirus disease 2019, COVID-19）影响的特别说明：受COVID-19全球大流行影响，2021年夏季野外工作受到部分限制。前往原住民村落需在抵达后接受10至14天的隔离检疫，导致野外工作启动时间较往年延后。尽管错过了6月的采样窗口期，但所有监测点位均至少获取了一套完整的野外观测数据，因此本次基础野外观测仍视为圆满完成。