Meltwater fraction data in Pine Island Bay, West Antarctica (Jan–Feb 2020)

1. General InformationTitle: Meltwater fraction data in Pine Island Bay, West Antarctica (Jan–Feb 2020)Data Collection Period: January 29th – February 15th, 2020Platform: IBRV ARAON (Korea Polar Research Institute)Location: Pine Island Bay (PIB), West Antarctica 2. Dataset DescriptionThis dataset contains meltwater (MW) fractions calculated using in situ observations of absolute salinity (SA) and dissolved oxygen (DO).Variables:lat: Latitude [unit: °N]lon: Longitude [unit: °E]MWfrac: Calculated Meltwater Fraction [range: 0 to 1]JulianT: Time in Julian Days [unit: days] 3. MethodologyThe MW fraction was calculated using the Composite Tracer Method (Jenkins, 1999) based on a three-end-member mixing analysis. Data points influenced by non-conservative surface processes or those falling outside the mixing triangle were excluded. 4. Citation & AttributionIf you use this dataset, please cite the following article:Kim, J., Nam, S., & Yoon, S.-T. (2026, under review). High fraction of glacial meltwater along two separate isopycnals observed in summer 2020 near and off the Pine Island and Thwaites ice shelves, West Antarctica. Journal of Geophysical Research: Oceans.(Note: This dataset was generated specifically for the study mentioned above.) 5. Further InformationFor detailed information regarding end-member selection, sensitivity tests, and uncertainty analysis, please refer to the associated manuscript [Kim et al., 2026].