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.