Impact of Riverine Source Rock Material on Global Ocean POC Flux Simulation: A Comparative Study

The scatter plot in Figure 3 and the Taylor diagram in Figure 4 indicate that there is no significant difference in the performance of simulating 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 diffusion towards the open ocean. Several simulations show similar effects globally, indicating that the inclusion of the effect of riverine source rock material on POC flux simulation did not significantly improve or adversely affect global ocean modeling. This does not necessarily mean that the modeling effect in the sensitive experimental group in the marginal seas has not changed, but rather that the limited sediment trap data collected in the marginal seas may have a smaller impact on the overall correlation and regression slope. It is worth mentioning that although the change in modeling effect is not significant, the inclusion of the effect of riverine source rock material on POC flux simulation without logarithmic transformation has slightly increased the correlation coefficient between the simulated results and the observed values, from 0.58 in the control group to the highest value of 0.68 in the sensitive experimental group, especially in the sensitive experiment of riverine source rock material transporting towards the ocean along the continental shelf and slope.