Nico Lange¹, Dr. Matthew Paul Humphreys, PhD², Henry C Bittig³, Brendan Carter⁴, Siv K Lauvset¹ and GLODAP Reference Group, (1)NORCE Research, Climate and Environment, Bjerknes Centre for Climate Research, Bergen, Norway, (2)NIOZ Royal Netherlands Institute for Sea Research, Ocean Systems, Texel, 't Horntje, Netherlands, (3)Leibniz Institute for Baltic Sea Research, 18119 Warnemunde, Germany, (4)NOAA Pacific Marine Environmental Laboratory, Seattle, United States