Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2015S42, deployed during POLARSTERN cruise PS96 (ANT-XXXI/2)

Snow height was measured by the Snow Depth Buoy 2015S42, 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 26 Dec 2015 and 04 May 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由部署于南极海冰的自主漂移观测平台——雪深浮标（Snow Depth Buoy）2015S42完成，观测时段覆盖“极星号（POLARSTERN）”科考航次PS96（ANT-XXXI/2）期间。所得到的时间序列记录了2015年12月26日至2016年5月4日期间，雪深随空间位置与时间的演化过程，采样间隔为1小时。 该雪深浮标搭载四个独立声呐测深传感器，可覆盖浮标周边约10平方米的观测区域，浮标部署于多年海冰之上。除雪深外，该浮标还同步观测了地理定位（GPS）、大气压力、空气温度以及浮标内部的冰温。 当积雪表面消融持续波及海冰时，会出现雪深负值。此类观测值反映的是海冰表面相对于初始雪-冰界面的位置。各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，包括剔除明显的异常数据与缺失值。无雪深数据的记录仍可用于海冰漂移分析。