Figure 5: Chromium–nutrient and Cr–AOU cross plots.
Dissolved Cr is shown compared to AOU (A, B), PO4 (C, D) and Si(OH)4 (E, F) for the intermediate (A, C, E) and deepwater (B, D, F) dataset to highlight decoupling of Cr from tracers of organic matter respiration and regeneration of organic-associated macronutrients (AOU, PO4). Symbols follow those used in Figure 4.