Profiles of temperature, salinity and dissolved oxygen measured by a handheld CTD in a lead during expedition PS122/5 (MOSAiC Leg 5) to the central Arctic in August-September 2020

• Main Authors: Nomura, Daiki, Kawaguchi, Yusuke, Hoppmann, Mario, Damm, Ellen, Li, Yuhong
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: Arctic Ocean; Calculated from temperature and conductivity; CTD profiler; JFE Advantech; RINKO-Profiler; DATE/TIME; DEPTH; water; Event label; freshwater layer; LATITUDE; LONGITUDE; melt water; MOSAiC; MOSAiC20192020; Multidisciplinary drifting Observatory for the Study of Arctic Climate; North Pole; Oxygen; dissolved; Polarstern; PS122/5; PS122/5_59-225; PS122/5_59-226; PS122/5_59-230; PS122/5_59-258; PS122/5_59-260; PS122/5_59-297; PS122/5_59-419; PS122/5_62-41; PS122/5_99-1; PS122/5_99-10; PS122/5_99-12; PS122/5_99-19; PS122/5_99-26; PS122/5_99-27; PS122/5_99-3; PS122/5_99-32; PS122/5_99-37; PS122/5_99-40; Salinity; Sea ice; Site; Temperature; Width of the lead; fracture or crack; Arctic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.945337; https://doi.org/10.1594/PANGAEA.945337

18 profiles of seawater temperature, salinity and dissolved oxygen were obtained in a lead next to the MOSAiC Leg5 ice camp between 23 August and 17 September 2020. A Rinko handheld CTD (JFE Advantech Co., Ltd., Japan) was carefully lowered into the lead on a regular basis to determine the spatial distribution and temporal evolution of the stratification in the upper 5 m. The several meter wide lead had formed from an initially small crack through the main ice floe on 24 August 2020. Ice dynamics caused the lead to successively open and close throughout the study period. Lead widths were recorded via a laser distance meter during each profile. A fresh meltwater layer was detected at several locations beneath the floe, and was also observed in the lead. As part of a dedicated study, the present dataset documents the evolution of this layer.