Footnote u

^uSee Thomas and Ittekkot 2001; Thomas 2002.

Thomas, H. and V. Ittekkot. 2001. Determination of anthropogenic CO₂ in the North Atlantic Ocean using water mass ages and CO₂ equilibrium chemistry. J. Mar. Sys., 27:325-336.

Thomas, H. 2002. Remineralisation ratios of carbon, nutrients and oxygen in the North Atlantic Ocean - a field data based assessment. Global Biogeochem. Cycles 16, DOI 10.1029/2001GB001452.