Time-series data of physical oceanography and ocean current velocity were obtained from mooring AWI208-9 in the northern Weddell Sea between January 2019 and April 2022 as part of the Hybrid Antarctic Float Observing System (HAFOS). The mooring was deployed during RV POLARSTERN expedition PS117, and recovered during PS129. The attached archive contains raw data files of two Seabird SBE37 MicroCATs (nominal depths: 797m, 4758m; sampling interval 2h), and one Nortek Aquadopp current meters (nominal depth: 794m; sampling interval 1h). The mooring also included a Develogic Sonovault (nominal depth: 294m; raw data not publicly available) for passive acoustic monitoring. Auxiliary information such as sensor calibration sheets, mooring diagrams, and schedule files are also provided, if applicable. The 797m MicroCAT did not record any data.

The file AWI208-9.zip includes all available sensor raw data from mooring AWI208-9. The structure of the unzipped folders is mooring->sensor/sampler type->serial number->instrument files. All instruments were synced 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, relevant sampler schedule files, and additional information if available. Finally, mooring schematics and recovery protocols are also attached as pdfs in the root folder. The authors are grateful to the captains, crews, and technical/scientific staff of the expeditions PS117 and PS129 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 acknowledge.