Class Model build to test Table 1 from Doughty et. al, "Nutrient Transport in a World of Giants", PNAS, 2016.
Parameter estimates for the global Phosphorus cycle come from Fig. 1 of Compton et al., "Variations in the Global Phosphorous Cycle", Marine Authigenesis: From Global to Microbial, SEPM Special Publication No. 66, 2000.