Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2015S32, deployed during POLARSTERN cruise PS94 (ARK-XXIX/3)

Snow height was measured by the Snow Depth Buoy 2015S32, an autonomous platform, drifting on Arctic sea ice, deployed during POLARSTERN cruise PS94 (ARK-XXIX/3). The resulting time series describes the evolution of snow depth as a function of place and time between 10 Sep 2015 and 28 Apr 2016 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.

雪深由2015S32型雪深浮标（Snow Depth Buoy）测得，该自主观测平台随北极海冰漂流，部署于极星号（POLARSTERN）科考航次PS94（ARK-XXIX/3）期间。所获取的时间序列刻画了2015年9月10日至2016年4月28日期间，雪深随空间与时间的演化规律，采样间隔为1小时。该雪深浮标包含四组独立的声呐（sonar）测量数据，覆盖浮标周边约10平方米的区域。该浮标布设于一年冰（first year ice）之上。除雪深外，同步观测还包括地理位置（GPS）、大气压强、气温以及浮标内部的冰温。当表面消融持续波及海冰内部时，会出现雪深负值。此类测量表征的是海冰表面相对于初始雪-冰界面的位置。各单传感器的测量差值可反映浮标周边积雪覆盖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数据（缺失值）。无有效雪深数据的观测记录仍可用于海冰漂流分析。