Figure 6. Comparison of particulate organic carbon and biogenic
silica fluxes estimated using different approaches during EXPORTS.
Depth profiles of POC (left) and bSi (right) fluxes obtained from the
MSC assuming a sinking velocity of 18 m d-1 (black
triangles) to 36 m d-1 (filled area), Thorium-234
assessment (pink circles, Buesseler et al., 2020) and drifting sediment
traps (orange squares, Estapa et al., 2021). The MSC fluxes are
calculated using the background biogeochemical concentrations. Note that
we do not consider the 195 m depth to be well represented due to there
being only a single POC and bSi observation at that depth.