Evaluation of biogeochemical float pCO2 estimates and empirical approaches to estimate total alkalinity in the Southern Ocean using carbonate system observations from the Drake Passage

David R Munro, National Oceanic and Atmospheric Administration, Global Monitoring Division, Earth System Research Laboratory, Boulder, CO, United States; Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States, Yuichiro Takeshita, Monterey Bay Aquarium Research Institute, CA, United States, Seth M Bushinsky, University of Hawaii at Manoa, Marine Sciences Building, Honolulu, HI, United States, Colm Sweeney, NOAA ESRL, Global Monitoring Division, Boulder, CO, United States and Taro Takahashi, Columbia Univ, Palisades, NY, United States