Drill-hole ridge ice and snow thickness and draft measurements of "Jaridge" during MOSAiC 2019/20

Snow and first-year sea ice ridge thickness, draft, and morphology were measured using a 2-inch ice drilling auger (Kovacs Enterprises) during walking surveys on the first-year ice ridge during the MOSAiC expedition. Drilling was performed during June and July 2020 across seven drilling transects. The total covered area was approximately 35 m by 25 m. The investigated “Jaridge” was formed on February 4–12, 2020 between first- and second-year ice and consisted mainly of 0.2–0.4 m thick ice blocks. The ridge was located on drifting sea ice in the Arctic Ocean within the Central Observatory of MOSAiC.

The table contains the event label (1), event ID (2), time (3), and global coordinates (4,5) of each drilling measurement. Each separate drilling hole has its number (6), and local coordinates X (7) and Y (8) in [m]. Global coordinates are given for the local coordinates of (0,0). For each drill hole, the depth relative to the waterline of the top (9) and bottom (10) interface of each separate layer is given together with its ice type (11). Ice types include snow, ice, and water. The drill hole with local coordinates of (0,0) coincides with the ice mass balance buoy 2020M26 installation described in doi:10.1594/PANGAEA.926580. The drill holes with local coordinates of (7.5,20) and (19,35) coincide with the isotope and salinity data from ice coring described in doi:10.1594/PANGAEA.943746 for events PS122/4_46-178 and PS122/4_47-199.

本数据集依托MOSAiC科考航次，在一年海冰脊步行勘察期间，采用2英寸冰钻钻机（Kovacs Enterprises出品）对积雪与一年海冰脊的厚度、吃水及形态特征开展测量。钻孔作业于2020年6月至7月间实施，共布设7条钻孔断面，总勘察覆盖面积约35米×25米。本次勘察的“Jaridge”海冰脊形成于2020年2月4日至12日，分布于一年海冰与次年海冰之间，主体由厚度0.2~0.4米的冰块组成；该海冰脊坐落于北冰洋漂流海冰上的MOSAiC中央观测区内。

本数据集表格包含各钻孔测量的事件标签（第1列）、事件ID（第2列）、测量时间（第3列）以及全球坐标（第4、5列）。每个独立钻孔均配有专属编号（第6列），并附带以米为单位的局部X坐标（第7列）与Y坐标（第8列）；局部坐标(0,0)对应的全球坐标已作为基准参数给出。针对每个钻孔，表格还给出了各独立层顶界面（第9列）与底界面（第10列）相对于水线的深度，以及对应的冰体类型（第11列）；冰体类型涵盖积雪、海冰与海水。局部坐标为(0,0)的钻孔，与文献doi:10.1594/PANGAEA.926580中记载的2020M26号冰质量平衡浮标（ice mass balance buoy）安装位置一致；局部坐标为(7.5,20)与(19,35)的钻孔，则分别匹配文献doi:10.1594/PANGAEA.943746中对应事件PS122/4_46-178与PS122/4_47-199的冰芯同位素及盐度数据。