Hydrographic and Calibrated Dissolved Oxygen Observations from the Canada and Makarov Basins, HLY2202 (2022)

This dataset provides calibrated, high-resolution dissolved oxygen measurements from CTD (conductivity, temperature, and depth) profiles collected during the 2022 HLY2202 expedition aboard the USCGC (United States Coast Guard Cutter) Healy across the Arctic Ocean. The product includes corrected dissolved oxygen concentrations, oxygen saturation, and apparent oxygen utilization (AOU), derived from Winkler-referenced calibration of CTD oxygen sensors. The dataset spans the Canada and Makarov Basin and captures the vertical structure of oxygen from surface to deep waters. These data are intended to support biogeochemical investigations of ventilation, water mass transformation, and remineralization processes that drive oxygen variability in the Arctic Basin. The calibrated oxygen fields enable direct comparison with historical hydrographic surveys, facilitating assessment of spatial gradients, vertical oxygen structure, and decadal-scale changes in dissolved oxygen. The dataset is distributed in NetCDF format to support reproducible analysis and long-term archival.