This data set was acquired with a CTD during R/V Nathaniel B. Palmer expedition NBP1503 conducted in 2015 (Chief Scientist: Dr. Frank O. Nitsche, Investigator: Dr. Frank O. Nitsche). These data files are of Sea-Bird CTD format and include Conductivity, Density, Fluorescence, Oxygen, Pressure, Salinity, Sound Velocity, Temperature and Visible Radiation data that were processed after acquisition. Data were acquired as part of the project(s): Vulnerability of East Antarctic Ice Streams to warm Ocean Water Incursions. Funding was provided by NSF award(s): PLR12-45879.