Groundwater and active layer measurements at permafrost sites (DP1.20099.001)

In arctic environments with permafrost there is a seasonal change in active thawed layer and liquid water that drive the hydrology of the system. This seasonal freeze/thaw cycle causes frost heaving of groundwater wells, making measurements of groundwater elevation inaccurate due to sensor movement. Therefore, this data product contains measurements of depth to liquid water and thaw relative to the ground surface made manually rather than using a sensor that would require a fixed elevation throughout the season. For additional details, see the user guide, protocols, and science design listed in the Documentation section in this data product's details webpage.

在存在永久冻土的北极环境中，活动解冻层与液态水的季节性变化驱动着该系统的水文过程。这种季节性冻融循环会引发地下水井冻胀，因传感器位移导致地下水水位测量结果失准。因此，本数据集产品包含以地面为基准的液态水埋藏深度与解冻状态的人工测量数据，而非依赖整个观测季需保持固定高程的传感器所采集的数据。如需获取更多细节，请查阅本数据集详情网页中「文档」板块所列的用户指南、观测规程与科学设计方案。