Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2017S53, deployed during POLARSTERN cruise PS106 (ARK-XXXI/1)

Snow height was measured by the Snow Depth Buoy 2017S53, an autonomous platform, drifting on Arctic sea ice, deployed during POLARSTERN cruise ARK-XXXI/1 (PS106). The resulting time series describes the evolution of snow depth as a function of place and time between 07 Jun 2017 and 12 Jul 2017 in sample intervals of 1 hour. The Snow Depth Buoy consists of four independent sonar measurements representing the area (approx. 10 m**2) around the buoy. The buoy was installed on first year ice. In addition to snow depth, geographic position (GPS), barometric pressure, air temperature, and an internal ice temperature were measured. Negative values of snow height occur if surface ablation continues into the sea ice. Thus, these measurements describe the position of the sea ice surface relative to the original snow-ice interface. Differences between single sensors indicate small-scale variability of the snow pack around the buoy. The data set has been processed, including the removal of obvious inconsistencies (missing values). Records without any snow depth may still be used for sea ice drift analyses.

本数据集的雪深观测由2017S53型雪深浮标（Snow Depth Buoy）测得，该浮标为自主观测平台，随北极海冰漂流，部署于极星号（POLARSTERN）科考航次ARK-XXXI/1（PS106）期间。所生成的时间序列刻画了2017年6月7日至2017年7月12日期间，雪深随空间位置与时间的演化规律，采样间隔为1小时。该雪深浮标搭载4套独立声呐测量单元，可覆盖浮标周边约10平方米的观测区域。浮标布设于一年海冰之上。除雪深参数外，该浮标还同步采集了地理定位数据（GPS）、大气压强、气温以及冰内温度等观测指标。当表面消融延伸至海冰内部时，会出现雪高负值，此类测量值表征的是海冰表面相对于初始雪-冰界面的位置。各单个传感器间的测量差值可反映浮标周边积雪层的小尺度空间变异性。本数据集已完成预处理工作，包括剔除明显的异常值（缺失值）。即便无有效雪深记录，该数据集仍可用于海冰漂流分析。