Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2015S28, deployed during the Norwegian Young sea ICE cruise N-ICE 2015

Snow height was measured by the Snow Depth Buoy 2015S28, an autonomous platform, drifting on Arctic sea ice, deployed during the Norwegian Young sea ICE cruise (N-ICE 2015) project. The resulting time series describes the evolution of snow depth as a function of place and time between 21 Apr 2015 and 11 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 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.

本数据集的雪深观测数据由雪深浮标2015S28（Snow Depth Buoy 2015S28）采集。该浮标为自主观测平台，随北极海冰漂移，部署于挪威青年海冰科考（Norwegian Young sea ICE cruise，简称N-ICE 2015）项目中。所得时间序列记录了2015年4月21日至2015年6月11日期间，雪深随空间与时间的演化过程，采样间隔为1小时。该雪深浮标搭载4组独立声呐测量单元，覆盖浮标周边约10平方米的观测区域。浮标部署于一年冰之上。除雪深外，该系统还同步采集了地理定位（GPS）、大气压强、空气温度及冰内温度等辅助参数。当表面消融持续延伸至海冰内部时，雪深会出现负值，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。单个传感器间的测量差值可反映浮标周边积雪的小尺度空间异质性。本数据集已完成预处理工作，包括剔除明显的异常值与缺失数据。无有效雪深记录的数据集仍可用于海冰漂移分析。