Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2014S12, deployed during POLARSTERN cruise PS82 (ANT-XXIX/9)

Snow height was measured by the Snow Depth Buoy 2014S12, an autonomous platform, drifting on Antarctic sea ice, deployed during POLARSTERN cruise PS82 (ANT-XXIX/9). The resulting time series describes the evolution of snow height as a function of place and time between 17 Jan 2014 and 02 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 first year ice. In addition to snow height, 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 height may still be used for sea ice drift analyses.

本数据集的雪深数据由2014S12型雪深浮标（Snow Depth Buoy 2014S12）采集，该自主观测平台随南极海冰漂移，部署于极星号（POLARSTERN）航次PS82（ANT-XXIX/9）执行期间。所得到的时间序列刻画了2014年1月17日至2016年2月2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4组独立声呐测量单元，可覆盖浮标周边约10平方米的观测区域。该浮标被安装于一年冰（first year ice）之上。除雪深数据外，该浮标还同步采集了地理定位（GPS）、大气压强、空气温度以及浮标内部冰温等观测参数。当表面消融持续延伸至海冰内部时，雪深观测值会出现负值，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工作，包括剔除明显的异常值（缺失值）。无有效雪深数据的记录仍可用于海冰漂移分析。