Seasonal soil active layer measurements from a Circumpolar Active Layer Monitoring (CALM) grid, Atqasuk, Alaska, 2017

Active layer depth measurements were collected during the 2017 growing season at each Circumpolar Active Layer Monitoring (CALM) grid subset plot (30) located in Atqasuk, Alaska. At each plot two active layer depth measurements were acquired, the date, start and end times, and the people present were also recorded. Active layer depth measurements were taken outside of every plot on the northeastern most corner 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.

本数据集于2017年生长季，在位于阿拉斯加州阿特卡斯克的环极地活动层监测（Circumpolar Active Layer Monitoring, CALM）网格子样地（共30个）中采集活动层厚度（active layer depth）测量数据。每个样地均开展两次活动层厚度测量，同时记录测量日期、起止时间以及在场人员信息。为减少对植被的干扰，所有测量均在每个样地的东北最外侧角落进行。本次测量属于北极观测网（Arctic Observing Network, AON）-国际苔原实验（International Tundra Experiment, ITEX）计划的一部分，旨在记录高空间尺度下地表湿度与结构的季节变化。