Micro-inclusions identified with Raman spectroscopy in thirteen samples (1360 -2115 m) from the EastGRIP ice core

Micro-inclusions in thirteen samples (1360-2115 m) from the Last Glacial of the East Greenland Ice Core Project ice core in North-East Greenland were located with microstructure mapping and analysed with Raman spectroscopy. Ice samples were drilled and processed between 2018 and 2019, Raman analysis was performed between March 2021 and April 2022 at the Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research. The samples are between 14.4 and 49.8 ka yr old and cover the Last Glacial period. Ice sample sizes are usually 10 x 10 mm; micro-inclusions are only a few micrometers large. The original ice core sample bag (55 cm long) number is indicated by four numbers, the number after the underscore implies the section of the respective bag. S_x indicated the sample number as referred to in the preprint, the depth is displayed in m. Located micro-inclusions are indicated with colored dots measured with Raman spectroscopy. Images point in the direction of the ice sheet surface, i.e. top is upwards.

格陵兰东北部东格陵兰冰芯计划（East Greenland Ice Core Project）冰芯末次冰期段的13个冰样（深度区间为1360~2115 m），通过显微结构测绘法完成内部显微包裹体的定位，并采用拉曼光谱（Raman spectroscopy）开展分析。冰样的钻取与前处理工作于2018至2019年间完成，拉曼光谱分析则于2021年3月至2022年4月在阿尔弗雷德·魏格纳研究所亥姆霍兹极地与海洋研究中心（Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research）开展。本次研究的冰样年代介于14.4至49.8千年之间，覆盖末次冰期时段。冰样常规尺寸为10×10 mm，而内部显微包裹体的粒径仅为数微米。原冰样储存袋（长55 cm）的编号由四位数字构成，下划线后的数字代表对应储存袋的子段序号。预印本中提及的样品编号以S_x标注，深度单位为米。经拉曼光谱检测确认的显微包裹体以彩色圆点标注；所有图像均以冰盖表面方向为正向，即图像顶部对应冰盖上方。