William M Landing, Florida State University, Earth, Ocean, and Atmospheric Science, Tallahassee, FL, United States, Reiner Schlitzer, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, Maria Teresa Maldonado, University of British Columbia, Earth, Ocean & Atmospheric Sciences, Vancouver, BC, Canada, Ana Aguilar-Islas, University of Alaska Fairbanks, Fairbanks, United States, Hélène Planquette, IUEM Institut Universitaire Européen de la Mer, LEMAR (CNRS, Univ Brest, IRD, Ifremer), Plouzané, France, Robert F Anderson, Lamont-Doherty Earth Observatory at Columbia University, Palisades, United States, Elena Masferrer Dodas, GEOTRACES International Project Office LEGOS-OMP, Toulouse, France and Donna Cockwell, GEOTRACES International Data Assembly Centre, British Oceanographic Data Centre, Southampton, United Kingdom