Here lists simulation issues specific to LTCM model in additon to the LTMIP protocol Simulation: Since the LTCM box model does not include changes in ocean circulation, climate feedbacks refer to effect of temperature change on CO2 solubility. In additon to sediment and weathering, simulations including changes in shallow water calcium carbonate deposition were also conducted. Duration: Since the model is quick to run, simulations including sediment, weathering, and shallow-water deposition were conducted for 1 million years and simulations including only ocean uptake were conducted for 10,000 years.