Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2015S39, deployed during POLARSTERN cruise PS96 (ANT-XXXI/2)@en

Snow height was measured by the Snow Depth Buoy 2015S39, an autonomous platform, drifting on Antarctic sea ice, during POLARSTERN cruise PS96 (ANT-XXXI/2). The resulting time series describes the evolution of snow depth as a function of place and time between 23 Dec 2015 and 13 Feb 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 multi 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 depth 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数据由雪深浮标（Snow Depth Buoy）2015S39采集，该自主观测平台搭载于南极海冰随流漂移，观测时段覆盖"极星号"（POLARSTERN）科考航次PS96（ANT-XXXI/2）执行期间。所得到的时间序列记录了2015年12月23日至2016年2月13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。该雪深浮标配备4台独立声呐传感器，可覆盖浮标周边约10平方米的观测范围。该浮标部署于多年海冰之上。除雪深参数外，该浮标还同步采集了地理定位（GPS）、大气压强、气温以及海冰内部温度等多类观测数据。当海冰表层消融持续波及海冰内部时，雪深观测值会出现负值，此类负值观测实际上表征了海冰表面相对于初始雪冰界面的位置偏移。各单台传感器间的观测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流程，包括剔除明显的异常值与缺失值。即便无有效雪深观测的记录，仍可用于海冰漂移相关分析工作。