On the other hand, the transport term of the DIC equation (Fig. 5d) shows a more complex pattern than the Corg transport term. It is positive in a narrow strip along the northern coast and in the central and eastern part of the domain, while it CNX1351 is negative in the northern, in the far east and in the southern parts. The coastal positive area reflects the contribution of DIC from adjacent zones and from the river discharges, which veer westward due to the Coriolis force, whereas the northward advection of DIC-rich southern waters causes the positive values in the central and eastern part. The negative values account for the presence of a local surplus of DIC, which is exported. Sources of local DIC are the air–sea CO2 exchange and the NPP term in the northern and eastern areas and in the southern area, respectively.
Finally, respiration at the bottom (Fig. 5e) shows a pattern that reflects the sinking and accumulation of organic matter there: the highest rates are simulated within the shallow western area. Burial (Fig. 5f) represents a net loss of carbon from the pelagic system, but it has a marginal importance, with the highest values only in the western part of the domain, where the sinking of particulate organic matter is relevant.