Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2014S11, deployed during POLARSTERN cruise PS82 (ANT-XXIX/9)

Snow height was measured by the Snow Depth Buoy 2014S11, 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 29 Jan 2014 and 02 Jun 2015 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.

本数据集的雪高数据由2014S11型雪深浮标（Snow Depth Buoy）测得，该自主观测平台随南极海冰漂流，部署于“极星号”（POLARSTERN）科考航次PS82（ANT-XXIX/9）期间。所得时间序列刻画了2014年1月29日至2015年6月2日期间，雪高随空间位置与时间的演化过程，采样间隔为1小时。该雪深浮标包含四组独立声呐测量数据，覆盖浮标周边约10平方米的观测区域。本浮标布设于一年海冰之上。除雪高参数外，同步观测的变量还包括地理定位（GPS）、大气压强、空气温度以及浮标内部冰温。雪高负值的出现，意味着表层消融持续渗透至海冰内部，此类测量值表征海冰表面相对于初始雪-冰界面的相对位置。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流程，包括剔除明显的异常不一致数据（缺失值）。即便未获取到有效雪高数据，对应的记录仍可用于海冰漂流分析。