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.本数据集的雪深数据由雪深浮标（Snow Depth Buoy）2014S11测得，该浮标为搭载于南极海冰之上随冰漂流的自主观测平台，于极星号（POLARSTERN）科考航次PS82（ANT-XXIX/9）期间完成布放。所获时间序列记录了2014年1月29日至2015年6月2日期间，雪深随空间与时间的演化过程，采样间隔为1小时。 该雪深浮标配备4套独立声呐传感器，观测覆盖浮标周边约10平方米的区域，布设于一年冰（first year ice）之上。除雪深参数外，该平台还同步采集地理定位（GPS）、大气压力、气温以及浮标内部冰温等辅助观测数据。 当海冰表面消融持续延伸至海冰内部时，雪深观测值会出现负值，此类负值表征的是海冰表面相对于初始雪-冰界面的相对位置。各单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与缺失值；即便无有效雪深观测的记录，仍可用于海冰漂流相关分析。