Time-series data of physical oceanography were obtained from mooring AWI227-15 in the northeastern Weddell Sea between December 2018 and March 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 one Seabird SBE37 MicroCAT (nominal depth: 4560m; sampling interval 2h). The mooring also included one Develogic Sonovault (nominal depth: 285m; 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 file AWI227-15.zip includes all available sensor raw data from mooring AWI227-15. 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.