Impact of Riverine Source Rock Material on Global Ocean POC Flux Simulation

The scatter plot in Figure 3 and the Taylor diagram in Figure 4 indicate that there is no significant difference in the quality of simulated global ocean POC flux between the control group and the sensitive experimental group, despite changes in the concentration of riverine source rock material and the distance of its diffusion towards the open ocean. This suggests that, although the inclusion of the compressive effect of riverine source rock material did not significantly improve the simulation of global ocean POC flux, it also did not have an adverse effect. This does not mean that the simulation of the marginal seas in the sensitive experimental group did not change, but rather it may be due to the limited sediment trap data collected from the marginal seas, which had a smaller effect on the overall correlation and regression slope. It is worth mentioning that, although the change in simulation quality was not significant, the addition of the compressive effect of riverine source rock material slightly increased the correlation coefficient between the simulated POC flux and the observed value, from 0.58 in the control group to a maximum of 0.68 in the sensitive experimental group, especially in the sensitive experiment of riverine source rock material migrating from the continental shelf and slope towards the ocean without logarithmic transformation.