In:  Supplement to: Bakker, Dorothee C E; O'Brien, Kevin M; Pfeil, Benjamin; Currie, Kim I; Kozyr, Alexander; Landa, Camilla S; Lauvset, Siv K; Metzl, Nicolas; Nakaoka, Shin-Ichiro; Nojiri, Yukihiro; Nonaka, Isao; Olsen, Are; Omar, Abdirahman M; Pierrot, Denis; Saito, Shu; Smith, Karl; Sutton, Adrienne; Sullivan, Kevin; Tilbrook, Bronte; Wanninkhof, Rik; Akl, John; Alin, Simone R; Barbero, Leticia; Barrera, Kira E; Beaumont, Laurence; Becker, Meike; Bernard, Christophe; Bott, Randy; Byrne, Robert; Cai, Wei-Jun; Cosca, Catherine E; Cross, Jessica; Daly, Kendra L; Danguy, Théo; De Carlo, Eric Heinen; Dietrich, Colin; Feely, Richard A; Fiedler, Björn; Glockzin, Michael; Gove, Matthew D; Goyet, Catherine; Guillot, Antoine; Hales, Burke; Hartman, Sue E; Herndon, Julian; Hoppema, Mario; Humphreys, Matthew P; Hunt, Christopher W; Huss, Betty; Hydes, David; Ibánhez, J Severino P; Ishii, Masao; Johannessen, Truls; Jones, Steve D; Kitidis, Vassilis; Knorr, Paul O; Körtzinger, Arne; Kosugi, Naohiro; Lee, Charity M; Lefèvre, Nathalie; Lo Monaco, Claire; Liu, Xuewu; Maenner, Stacy M; Manke, Ansley; Manzello, Derek P; Mathis, Jeremy T; Mickett, John; Millero, Frank J; Monacci, Natalie; Monteiro, Pedro; Morell, Julio; Munro, David R; Musielewicz, Sylvia; Neill, Craig; Newberger, Timothy; Newton, Jan; Noakes, Scott; Noh, Jae Hoon; Ohman, Mark; Ólafsdóttir, Sólveig Rósa; Ólafsson, Jón; Osborne, John; Padín, Xose Antonio; Rehder, Gregor; Reimer, Janet J; Robbins, Lisa L; Rutgersson, Anna; Sabine, Christopher L; Salisbury, Joe; Sasano, Daisuke; Schlitzer, Reiner; Schuster, Ute; Send, Uwe; Sieger, Rainer; Skjelvan, Ingunn; Steinhoff, Tobias; Sutherland, Stewart C; Sweeney, Colm; Takahashi, Taro; Telszewski, Maciej; Vandemark, Doug; van Heuven, Steven; Wallace, Douglas WR; Woosley, Ryan J; Wynn, Jonathan G; Yates, Kimberly Kaye (in prep.): Version 5 of the Surface Ocean CO2 Atlas (SOCAT).