Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2015S19, deployed during POLARSTERN cruise PS89 (ANT-XXX/2)@en

Snow height was measured by the Snow Depth Buoy 2015S19, an autonomous platform, installed on fast ice in the Atka Bay close to Neumayer III Base, Antarctic during POLARSTERN cruise PS89 (ANT-XXX/2). The resulting time series describes the evolution of snow depth as a function of place and time between 03 Jan 2015 and 15 Jul 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. 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.本数据集的雪深数据由雪深浮标2015S19（Snow Depth Buoy 2015S19）采集，该自主观测平台部署于南极阿特卡湾毗邻诺伊迈尔三号站的固定冰区，搭载于极星号（POLARSTERN）科考航次PS89（ANT-XXX/2）期间。所得时间序列刻画了2015年1月3日至2015年7月15日期间，雪深随空间位置与时间的演化规律，采样间隔为1小时。雪深浮标（Snow Depth Buoy）搭载四组独立声呐测量单元，可覆盖浮标周边约10平方米的区域。除雪深外，该平台还同步采集地理定位（GPS）、气压、气温及冰内温度数据。当海冰表面消融持续延伸至海冰内部时，雪深测量值会出现负值，因此本次采集的测量数据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的小尺度空间变异特征。本数据集已完成预处理流程，包括剔除明显的不一致数据（缺失值）。即便无有效雪深数据的记录，仍可用于海冰漂移分析。