Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2018S85, deployed during ODEN cruise AO18

Snow height was measured by the Snow Depth Buoy 2018S85, an autonomous platform, drifting on Arctic sea ice, deployed with the icebreaker ODEN during the Arctic Ocean 2018 campaign (AO18). The resulting time series describes the evolution of snow depth as a function of place and time between 17 September 2018 and 13 December 2018 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 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 depth may still be used for sea ice drift analyses.本数据集的雪深数据由2018S85型雪深浮标（Snow Depth Buoy）采集，该自主观测平台在北极海冰上随冰漂流，随破冰船ODEN于2018年北冰洋科考任务（AO18）中完成部署。所得时间序列刻画了2018年9月17日至12月13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。该雪深浮标包含四组独立声呐测量数据，覆盖浮标周边约10平方米的区域。浮标布设于多年冰之上。除雪深参数外，该平台还同步采集了地理定位（GPS）、大气压强、空气温度以及冰内温度等数据。当表面消融持续延伸至海冰时，雪高会出现负值，此时的测量值表征的是海冰表面相对于初始雪冰界面的位置。单个传感器间的数值差异，可反映浮标周边积雪的小尺度空间变异性。本数据集已完成预处理工作，包括剔除明显的异常值（缺失值）。即便未采集到有效雪深数据，相关记录仍可用于海冰漂流分析。