Alastair GC Graham, University of South Florida St. Petersburg, College of Marine Science, St Petersburg, United States, Anna Wahlin, University of Gothenburg, Gothenburg, Sweden, Robert D Larter, British Antarctic Survey, Cambridge, United Kingdom, Kelly Hogan, NERC British Antarctic Survey, Cambridge, United Kingdom, Frank Oliver Nitsche, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States, Karen J. Heywood, University of East Anglia, Norwich, NR4, United Kingdom, Rebecca Totten Minzoni, University of Alabama, Tuscaloosa, AL, United States, Julia S Wellner, University of Houston, Houston, TX, United States and NBP19-02 scientific party