This data set was acquired with a Sippican MK21 XBT Expendable Probe during Nathaniel B. Palmer expedition NBP1003 conducted in 2010 (Chief Scientist: Dr. Douglas Nowacek). 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 Research: The Ecological Role of a Poorly Studied Antarctic Krill Predator: The Humpback Whale, Megaptera Novaeangliae, and funding was provided by NSF grant(s): ANT07-39483.