English: Annual mean sea surface CFC-11 concentration for the present day (1990s) from the Global Ocean Data Analysis Project climatology. CFC-11 here is in nmol 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.