Beryllium-7 concentrations in ice during the MOSAiC expedition ...

• Main Author: Stephens, Mark
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: beryllium-7; Central Arctic Ocean; ice cores; MOSAiC expedition; winter; Event label; Sample ID; DATE/TIME; Site; LATITUDE; LONGITUDE; Ice thickness; Depth, top/min; Depth, bottom/max; Sample area; Sample volume; Beryllium-7; Beryllium-7, error; Ice corer; Gamma spectrometry; PS122/1; PS122/2; PS122/3; Polarstern; Multidisciplinary drifting Observatory for the Study of Arctic Climate MOSAiC; Arctic; Arctic Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.945408; https://doi.pangaea.de/10.1594/PANGAEA.945408

Ice cores were collected using a Kovacs Mark II 9 cm diameter corer (area = 63.62 cm2). We generally took three ice cores (total sample area = 190.85 cm2, 11 samples) from a site and combined them into one sample. Snow was swept away from the ice surface before drilling through the ice column. Once recovered, cores were laid out on a cradle to measure length (ice thickness) and then put in a plastic sleeve before being transported to Polarstern. After placing the cores in buckets, we added the following solutions: 5 ml hydrochloric acid, 2 ml iron chloride solution, and 1 ml of 1000 ppm stable beryllium AA standard (chemical yield tracer). After melting at room temperature, the water volume was measured using a graduated cylinder. Next, the sample was precipitated using ammonium hydroxide. After allowing the precipitate to settle, excess water was removed by decanting and centrifugation. The samples were transferred to petri dishes and placed in an oven for drying, and then analyzed with a high purity ...