R. Steinfeldt et al.: Anthropogenic carbon in the Atlantic 3863 Figure E1. (a, c, e) Whole water column, (b, d, f) only deep and bottom water masses. (a, b) 1990–2000, (c, d) 2000–2010, (e, f) 2010–2020. Only areas with a water depth larger than 200m are considered. Station locations for the first period (1982–1994 in a, b; 1995–2005 in c, d; and 2006–2013 in e, f) are marked in light grey, and those for the second period (1995–2005 in a, b; 2006–2013 in c, d; and 2014–2021 in e, f) are marked in black. Regions with differences smaller than the error range are stippled. Note the uneven spacing between contour intervals. https://doi.org/10.5194/bg-21-3839-2024 Biogeosciences, 21, 3839–3867, 2024