English: Annual mean sea surface anthropogenic dissolved inorganic carbon concentration for the present day (1990s) from the Global Ocean Data Analysis Project climatology (the signal of anthropogenic DIC was separated from background, natural DIC by a mathematical technique^[1]). DIC here is in mol m^-3 of seawater. Original mass units (kg^-1) converted to volume units (m^-3) using the SEAWATER toolbox to calculate density from World Ocean Atlas 2005 fields of temperature and salinity. It is plotted here using a Mollweide projection (using MATLAB and the M_Map package).

Note that the GLODAP climatology is missing data in certain oceanic provinces including the Arctic Ocean, the Caribbean Sea, the Mediterranean Sea and the Malay Archipelago.

1. ↑ Gruber, N., Sarmiento, J.L. and Stocker, T.F. (1996). An improved method for detecting anthropogenic CO₂ in the oceans, Global Biogeochemical Cycles 10:809– 837