Oxygen isotope, dissolved oxygen, and salinity data from JC211 CTD Niskin bottle samples, February-March 2021

This dataset contains the oxygen isotope (O-18), dissolved oxygen, and salinity data from water samples collected from Niskin bottles on the CTD rosette on cruise JC211, February-March 2021. This cruise was formed from four separate tasks: the Polar Ocean Ecosystems Time Series (POETS) north of South Georgia; observations near iceberg A-68A southeast of South Georgia; the A23 oceanographic transect from the shelf break southeast of South Georgia, south through the eastern Scotia Sea, and into the northern Weddell Sea; and the SR1b oceanographic transect from Elephant Island off the tip of the Antarctic Peninsula to Burdwood Bank south of the Falkland Islands.