Snowpit raw data collected during the MOSAiC expedition

This dataset captures the yearlong evolution of physical properties of the snow cover over Arctic sea ice during the MOSAiC expedition (October 2019-September 2020). It also includes the surface scattering layer that is typical of the melting summer sea ice surface. This dataset is specifically for measurements that were logged as “snowpit events” during MOSAiC. The snowpit events were either detailed point-measurements of vertical snow profiles or horizontally repeated transects, measured at selected locations in designated undisturbed areas. One snowpit event corresponds to one site visit. The snowpits are often co-located with measurements from other MOSAiC teams to improve our understanding of how snow cover affects and interacts with the atmosphere-sea ice-ocean-ecology system. Most snowpits were measured at least bi-weekly to capture the temporal evolution of physical properties of snow. Some snowpits were one-off events to capture interesting and unplanned-for surface conditions. This dataset includes 576 snowpit events, and describes the snow conditions during the entire expedition. […]

本数据集记录了MOSAiC科考（2019年10月—2020年9月）期间北极海冰上方积雪覆盖层物理特性的全年演化过程，同时涵盖夏季海冰融冻表面典型的表层散射层相关数据。本数据集专门收录MOSAiC科考期间被标记为“雪坑事件（snowpit events）”的测量数据：此类雪坑事件既包括垂直积雪剖面的精细化单点测量，也涵盖在指定未受干扰区域内选定点位开展的横向重复断面测量，每一次雪坑事件对应一次野外现场考察作业。多数雪坑点位会与其他MOSAiC科考团队的测量点位重合，以助力我们深入理解积雪覆盖层如何影响并作用于大气-海冰-海洋-生态系统。绝大多数雪坑的测量频率至少为每两周一次，以捕捉积雪物理特性的时间演化特征；部分雪坑为一次性观测作业，用于记录特殊且未提前规划的地表状况。本数据集共计包含576次雪坑事件，完整记录了整个科考期间的积雪状况。……