Auxiliary material for Paper 2007GB002958 Impact of oceanic circulation on biological carbon storage in the ocean and atmospheric pCO2 I. Marinov Program in Atmospheres, Oceans, and Climate, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA. Now at Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA A. Gnanadesikan NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, New Jersey, USA J. L. Sarmiento Atmospheric and Oceanic Sciences Program, Princeton University, Princeton, New Jersey, USA J. R. Toggweiler NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, New Jersey, USA M. Follows Program in Atmospheres, Oceans, and Climate, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA B. K. Mignone The Brookings Institution, Washington, D. C., USA Marinov, I., A. Gnanadesikan, J. L. Sarmiento, J. R. Toggweiler, M. Follows, and B. K. Mignone (2008), Impact of oceanic circulation on biological carbon storage in the ocean and atmospheric pCO2, Global Biogeochem. Cycles, 22, GB3007, doi:10.1029/2007GB002958. Introduction: This supplementary material contains about one page of text and two figures. This material confirms the existence of a robust and predictive functional relationship between globally averaged preformed PO4 and atmospheric pCO2. By contrast, surface nutrients do not predict well atmospheric pCO2 values. Results shown here are from Southern Ocean surface nutrient depletion simulations and global surface nutrient depletion simulations run in the eight circulation models described in the paper. 1. 2007gb002958-txts01.tex, 2007gb002958-txts01.pdf Confirms through an additional set of simulations that the functional relationship between globally averaged preformed PO4 and atmospheric pCO2 is robust and predictive. By contrast, there is no unique functional relationship between surface PO4 and atmospheric pCO2, regardless of how we define our surface PO4 average. 2. 2007gb002958-fs01.eps Atmospheric pCO2 versus surface PO4 and globally averaged preformed PO4. 3. 2007gb002958-fs02.eps Atmospheric pCO2 versus surface PO4 and globally averaged preformed PO4. Similar to Figure 1 but includes a wider range of simulations. The functional relationship between preformed PO4 and atmospheric pCO2 predicted in the paper holds for all models and simulations performed.