Snow height on sea ice, meteorological conditions and drift of sea ice from autonomous measurements from buoy 2020S105, deployed during MOSAiC 2019/20

Snow height was measured by the Snow Buoy 2020S105, an autonomous platform, installed on drifting sea ice in the Arctic Ocean during MOSAiC (Leg 5) 2019/20. The resulting time series describes the evolution of snow height as a function of place and time between 21 September 2020 and 12 April 2021 in sample intervals of 1 hour. The Snow Buoy consists of four independent acoustic range finder measurements representing the area (approx. 10 m**2) around the buoy. In addition to snow height, geographic position (GPS), barometric pressure, air temperature, and surface 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.

雪高由自主平台雪浮标2020S105测量，该浮标安装于北冰洋漂流海冰上，用于MOSAiC（第五航段，2019/20年）科考。生成的时间序列描述了2020年9月21日至2021年4月12日期间雪高随时间和空间的演变，采样间隔为1小时。雪浮标配备四个独立的声学测距仪（acoustic range finder），可对其周围约10平方米的区域进行测量。除雪高外，还测量了地理位置（GPS）、气压、气温和表面温度。若表面消融（surface ablation）持续至海冰内部，则会出现雪高负值；因此，这些测量值描述了海冰表面相对于原始雪-冰界面的位置。单个传感器间的差异反映了浮标周围积雪层（snow pack）的小尺度变异性。