Figure 3
From: Iron Biogeochemistry in the High Latitude North Atlantic Ocean

Average profiles (with SD of ±2σ) of DFe and TDFe in IB and IRB during spring and summer 2010, with bottom depths presented in separate box with expanded concentration range. Note the strongly increased and variable TDFe concentrations in the upper 200 m of the Iceland Basin during spring, with maximum TDFe concentration at the surface 34 ± 41 nM. Error bars represent the range of concentrations averaged at this depth interval (3–11 data points at each depth).