Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2016S37, deployed during POLARSTERN cruise PS96 (ANT-XXXI/2)

Snow height was measured by the Snow Depth Buoy 2016S37, 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 18 Jan 2016 and 24 Dec 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.

本数据集的观测数据由2016S37型雪深浮标（Snow Depth Buoy 2016S37）采集，该平台为在南极海冰上漂移的自主观测装置，搭载于POLARSTERN科考航次PS96（ANT-XXXI/2）期间。所得时间序列记录了2016年1月18日至2016年12月24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。该雪深浮标包含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，其部署于多年冰之上。除雪深参数外，同步观测的变量还包括地理位置（GPS）、大气压强、气温以及浮标内置冰温。当表面消融持续侵入海冰时，会出现雪深负值，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。各传感器间的测量差值可反映浮标周边积雪覆盖层的小尺度空间变异性。本数据集已完成预处理流程，包括剔除明显异常值（缺失值）。即便无有效雪深记录的数据条目，仍可用于海冰漂移分析。