Time-series data of physical & biological oceanography, nutrient biogeochemistry, molecular biology and carbon/particle export were obtained from mooring Y4-1 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 recovered during PS137 (ALOIS). The attached archive contains raw data files of three Seabird SBE37 MicroCATs (nominal depths: 18m, 37m, 246m, sampling interval 1h), one upward-looking Teledyne RDI 300 kHz Workhorse ADCP (nominal depth: 45m; sampling interval 1h), one Wetlabs ECO PAR sensor (nominal depth: 18m; sampling interval 1h), one Wetlabs ECO Triplet fluorometer (nominal depth: 18m; sampling interval 2h), two Satlantic SUNA nitrate sensors (nominal depths: 18m, 246m; sampling interval 4h), two Sunburst SAMI-pCO2 sensors (nominal depths: 18m, 246m; sampling interval 1h), and two Sunburst SAMI-pH sensor (nominal depths: 18m, 246m; sampling interval 3h). The mooring also included two McLane RAS water samplers (nominal depths: 18m, 246m; raw data not available), and two sediment traps (nominal depths: 191m, 582m; raw data not available). Auxiliary information such as sensor calibration sheets, mooring diagrams, and schedule files are also provided, if applicable.

The file Y4-1.zip includes all available sensor raw data from mooring Y4-1. 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.