Snow height on sea ice, meteorological conditions and drift of sea ice from autonomous measurements from buoy 2019S79, deployed during MOSAiC 2019/20

Snow height was measured by the Snow Buoy 2019S79, an autonomous platform, installed on drifting sea ice in the Arctic Ocean during MOSAiC (Leg 1) 2019/20. The resulting time series describes the evolution of snow height as a function of place and time between 07 Oct 2019 and 28 Nov 2010 in sample intervals of 1 hour. The Snow Buoy consists of four independent sonar measurements representing the area (approx. 10 m**2) around the buoy. The buoy was installed on pack ice. In addition to snow height, geographic position (GPS), barometric pressure, air temperature, and ice 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. 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 and meteorological analyses.本数据集的积雪高度观测由2019S79型雪浮标（Snow Buoy 2019S79）完成，该浮标为搭载于北冰洋漂流海冰上的自主观测平台，部署于2019/2020年北极气候多学科漂流观测计划（MOSAiC）第一航段期间。所得时间序列记录了2019年10月7日至2010年11月28日期间，积雪高度随空间位置与时间的演化过程，采样间隔为1小时。该雪浮标采用4台独立声呐设备开展观测，覆盖浮标周边约10平方米的区域，且部署于浮冰之上。除积雪高度外，该观测系统还同步获取了地理位置（GPS）、气压、气温以及冰面温度数据。若表面消融作用持续波及海冰内部，则积雪高度观测值将为负值，此类观测结果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，包括剔除明显的异常值与缺失值。即便未获取到积雪高度的有效观测记录，该数据仍可用于海冰漂移与气象相关分析。