Raw physical oceanography and ocean current velocity data from mooring Y3-1 on the Yermak Plateau, Arctic Ocean, July 2022 – June 2023

Time-series data of physical oceanography and ocean current velocities were obtained from mooring Y3-1 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 four Seabird SBE37 MicroCATs (nominal depths: 40m, 70m, 103m, 250m, sampling interval 10min/1h), eight Seabird SBE56 temperature loggers (nominal depths: 50m, 60m, 80m, 153m, 203m, 400m, 501m, 753m, sampling interval 30s), and one upward-looking Teledyne RDI 75 kHz Longranger ADCP (nominal depth: 306m; sampling interval 1h). Auxiliary information such as sensor calibration sheets, mooring diagrams, and schedule files are also provided, if applicable. The mooring also originally included a 29 m long tube segment at the top, which was however lost due to material failure in early February 2023. All data from the instruments in the tube (three SBE37 MicroCATs, three SBE 56 temperature recorders, one RBR Duo wave recorder, one Wetlabs ECO Triplet fluorometer, and one Nortek S500 ADCP) were therefore also lost. As another consequence, part of the remaining instruments beneath the lost tube were dislocated from their nominal depths due to the now missing buoyancy at the top of the mooring.