Soil Moisture MISP (Mobile Instrumented System Platform) and CALM (Circumpolar Active Layer Monitoring) grids in Barrow and Atqasuk, Alaska, 2018

Seasonal soil moisture measurements were collected during the 2018 growing seasons at each Circumpolar Active Layer Monitoring (CALM) grid subset plot (30) and at each Mobile Instrumented System Platform (MISP). Both of these grids are located at Utqiaġvik (formerly Barrow), Alaska as well as in Atqasuk, Alaska. For CALM measurements, at each plot one soil moisture measurement was acquired, the date, start and end times, and the people present were also recorded. Soil moisture measurements were taken outside of every plot on the northeastern most corner in order to reduce disturbance of vegetation. For MISP measurements, at each grid meter one soil moisture measurement was acquired, the date, start and end times, and the people present were also recorded. Soil moisture measurements were taken on the north side of the grid 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.

本数据集采集了2018年生长季期间，于30个环极活动层监测（Circumpolar Active Layer Monitoring, CALM）网格样地子集以及每个移动监测仪器系统平台（Mobile Instrumented System Platform, MISP）处获取的季节性土壤湿度数据。
上述两类监测网格均布设于阿拉斯加州乌特恰维克（Utqiaġvik，旧称巴罗Barrow）与阿拉斯加州阿塔萨克（Atqasuk）两地。
针对CALM监测流程：每个样地均开展1次土壤湿度测量，同步记录测量日期、测量起止时间及在场人员信息。为降低对植被的干扰，土壤湿度测点设置于每个样地的最东北侧角落外侧。
针对MISP监测流程：在每个网格米测点处采集1次土壤湿度数据，同步记录测量日期、测量起止时间及在场人员信息。为降低对植被的干扰，土壤湿度测点设置于网格北侧。
本数据集隶属于北极观测网络（Arctic Observing Network, AON）-国际苔原实验（International Tundra Experiment, ITEX）计划，旨在记录高空间尺度下地表湿度与地表结构的季节性变化。