Concentrations of dissolved (10 nM) in the bottom waters of the Laptev Sea shelf may be attributed to either sediment resuspension, sinking of brine or regeneration of DFe in the lower layers. A significant correlation (R2 = 0.60) between salinity and DFe is observed. Using d18O, salinity, nutrients and total alkalinity data, the main source for the high (>2 nM) DFe concentrations in the Amundsen and Makarov Basins is identified as (Eurasian) river water, transported with the Transpolar Drift (TPD). On the North American side of the TPD, the DFe concentrations are low (4) above the shelf and low (<4) off the shelf).

Given are all DFe data stations below 300m.

Supplement to: Klunder, Maarten B; Laan, Patrick; Middag, Rob; de Baar, Hein J W; Bakker, Karel (2012): Dissolved iron in the Arctic Ocean: Important role of hydrothermal sources, shelf input and scavenging removal. Journal of Geophysical Research: Oceans, 117, C04014