This data set was acquired with a Sippican MK21 Expendable BathyThermograph during R/V Nathaniel B. Palmer expedition NBP1702 conducted in 2017 (Chief Scientist: Dr. Rebecca Robinson, Investigator: Dr. Rebecca Robinson). These data files are of Sippican MK21 Export Data File format and include Temperature data that have not been processed. Data were acquired as part of the project(s): Collaborative Proposal: A Field and Laboratory Examination of the Diatom N and Si Isotope Proxies: Implications for Assessing the Southern Ocean Biological Pump; Water Mass Structure and Bottom Water Formation in the Ice-age Southern Ocean. Funding was provided by NSF award(s): PLR15-42962 and by: PLR13-41464.