Snow height on sea ice and sea ice drift from autonomous measurements from buoy 2014S24, deployed during Antarctic Fast Ice Network 2014 (AFIN 2014)

Snow height was measured by the Snow Depth Buoy 2014S24, an autonomous platform, installed close to Neumayer III Base, Antarctic during Antarctic Fast Ice Network 2014 (AFIN 2014). The resulting time series describes the evolution of snow depth as a function of place and time between 07 Mar 2014 and 16 May 2014 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 the ice shelf. In addition to snow depth, geographic position (GPS), barometric pressure, air temperature, and ice surface 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. Note: This data set contains only relative changes in snow depth, because no initial readings of absolute snow depth are available.

本数据集的雪深数据由雪深浮标（Snow Depth Buoy）2014S24测得，该自主观测平台部署于南极诺伊迈尔三号站（Neumayer III Base）附近，数据采集于2014年南极快速冰网计划（Antarctic Fast Ice Network 2014，简称AFIN 2014）期间。所得时间序列记录了2014年3月7日至2014年5月16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平方米的观测区域。该浮标部署于冰架之上。除雪深参数外，该浮标还同步采集地理定位（GPS）、大气压强、空气温度及冰面温度数据。当冰面消融持续延伸至海冰时，雪深测量值会出现负值，此类数据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覆盖层的小尺度空间变异性。本数据集已完成预处理流程，包括剔除明显的异常值与缺失值。即使未获取到雪深数据的记录，仍可用于海冰漂移分析。注：由于缺乏初始绝对雪深基准读数，本数据集仅包含雪深的相对变化量。