This data set was acquired with a Sea-Bird Electronics SBE-911+ CTD during R/V Nathaniel B. Palmer expedition NBP1801 conducted in 2017 (Chief Scientist: Dr. Grace Saba, Investigators: Dr. Grace Saba, Dr. Robert Dunbar, Dr. Giacomo DiTullio). These data files are of Sea-Bird CTD format and include Conductivity, Oxygen, Pressure and Temperature data that have not been processed. Data were acquired as part of the project(s): Estimation of Antarctic Ice Melt using Stable Isotopic Analyses of Seawater; Collaborative Research: Cobalamin and Iron Co-Limitation Of Phytoplankton Species in Terra Nova Bay; Using Bio-acoustics on an Autonomous Surveying Platform for the Examination of Phytoplankton-zooplankton and Fish Interactions in the Western Ross Sea. Funding was provided by NSF award(s): OPP16-44073, OPP16-44118, OPP17-43035.