Figure 6: Comparison of particulate Organic Carbon (OC) observations with model results. Observed OC (blue squares with standard deviation bars), modelled OC-S1 accounting for the oceanic sources of OA (red line—squares), and neglecting the marine OA sources (green line—triangles) at marine locations. (a) Amsterdam Island (37° S, 77° E; [41]) and (b) Finokalia (35° N, 25° E; [42] and [43]), (c) Azores (38° N, 27° W; from Pio et al. [44]. All values are in ng m-3.