OTTM outputs used to analyze Indian Ocean acidification

OTTM simulates the global ocean biogeochemistry and carbon cycle. It is an offline model driven by a re-analyzing ocean currents and other data from the ECDA system. OTTM utilizes a phosphate restoration approach to calculate the biological pumps and OCMIP-2 protocols to solve the surface ocean carbonate chemistry. A spatio-temporal community compensation depth is parameterized to reduce the biases in the seasonal cycle of pCO2.