This data set was acquired with a Sippican MK21 XCTD Expendable Probe during Laurence M. Gould expedition LMG1006 conducted in 2010 (Chief Scientist: Dr. James Hollibaugh). 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): Ammonia Oxidation Versus Heterotrophy in Crenarchaeota Populations from Marine Environments West of the Antarctic Peninsula, and funding was provided by NSF grant(s): ANT08-38996.