Time-series data of physical oceanography and ocean current velocities were obtained from mooring Y2-1 on the Yermak Plateau from July 2022 to June 2023 as part of the ATlantic WAter pathways to the ICE (ATWAICE) project. The mooring was deployed during RV POLARSTERN expedition PS131 (ATWAICE) and partially recovered during PS137 (ALOIS). After releasing and recovering the upper mooring segment containing the profiling winch system, sea ice conditions became unfavorable to recover the rest of the mooring. The lower part was then recovered during RV POLARSTERN PS143-2 in 2024. The attached archive contains raw data files of one Seabird SBE37 MicroCAT (nominal depth: 128m; sampling interval 1h), and one AWI profiling winch equipped with a SeaBird CTD, a chl-a fluorometer, a dissolved oxygen sensor, and a CO2 sensor (nominal depth: 127m; sampling interval 4 days). The mooring also included a Develogic Sono.Vault passive acoustic recorder (nominal depth: 308m; data archived elsewhere). Auxiliary information such as sensor calibration sheets, mooring diagrams, and schedule files are also provided, if applicable.

The file Y2-1.zip includes all available sensor raw data from mooring Y2-1. The structure of the unzipped folders is mooring->sensor/sampler type->serial number->instrument files. All instruments were synched to UTC before deployment, and the offset after the recovery is supplied in the respective instrument folder, if available. The archive also contains the sensor calibration sheets/files and relevant sampler schedule files, if available. Finally, mooring schematics are also attached as pdfs in the root folder.The authors are grateful to the captains, crews, and technical/scientific staff of the expeditions PS131 and PS137 onboard RV Polarstern. Many individuals have contributed to the conception of the research, the preparation of the instruments, the deployments and recoveries, as well as to the retrieval of the data, which we greatly appreciate. We acknowledge support from the Helmholtz infrastructure program "Frontiers in Arctic Marine Monitoring", and the Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung. This mooring contributed to the Arctic PASSION project.