Documentation and analysis of a global CO2 model developed by Peng et al. (1983)

摘要

A global carbon model, the Peng '83 model, has been standardized according to protocols developed for an intermodel comparison. The first part of this document describes the model as they received it, and the second part describes a standardized version of the model, which has been parameterized according to the protocols described. Model performance was evaluated according to defined criteria and a sensitivity analysis of the model was conducted to identify the most important parameters. Sensitivity analysis showed a shift in parameter importances with time. The initial conditions were of greatest importance for the length of these simulations, but declined in longer simulations. With the initial pCO2 excluded from the sensitivity analysis, ocean surface area (used to extrapolate results) was second in importance. While the CO2 exchange rate were initially most important, the model projections of atmospheric CO2 soon became more sensitive to the alkalinity of the ocean.