Some good links, although I would like to know Quay's assumption for carbon cycle time or seawater diffusion constant. I noticed in the PDF poster there is typo in your post: 0.021 decrease per year, not 0.002 like you and I thought. That's a lot more than the anthro contribution that I calculated (0.004 per year) from the NASA carbon numbers (quite simply, 6 parts anthro into 1560 parts seawater/atmosphere). This reversal means that seawater is absorbing a lot more anthro CO2 than I outlined in post 7.
OK, it should be. Thanks for checking.